Added old URL paths as aliases and cleaned up some code sections of old posts

This commit is contained in:
Brandon Rozek 2020-11-07 23:09:16 -05:00
parent 8e175e60e4
commit b86c103ade
27 changed files with 1023 additions and 966 deletions

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@ -5,6 +5,8 @@ date: 2015-04-16T22:19:36+00:00
author: Brandon Rozek
layout: post
guid: http://brandonrozek.com/?p=57
aliases:
- /2015/04/responsive-layout-and-animation/
permalink: /2015/04/responsive-layout-and-animation/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -32,51 +34,39 @@ Side Note: I changed the form of the equation to something similar to y = mx + b
There are many occasions where I want an element on the page to move between two points. The navigation in the header of my site (at the time of writing) is a great example of this. So knowing the two points I want it to lie between and having the screen width as the variable, I can plug in&#8230; [<img class="aligncenter size-full wp-image-58" src="https://brandonrozek.com/wp-content/uploads/2015/04/responsivelayoutequation.gif" alt="f(x) = (100 * (b - a)/(d - c))X + (ad - bc) / (d - c)" width="219" height="36" />](https://brandonrozek.com/wp-content/uploads/2015/04/responsivelayoutequation.gif){.broken_link} where a is the start pixel b is the end pixel c is the start media query d is the end media query and X is the screen width out of 100 otherwise known as 1vw \*\*Don&#8217;t forget to keep track of your units!! Whether it&#8217;s px/rem/em/etc.\*\* Say I want to push a box towards the right a minimum of 5px, a maximum of 20px and for the push to vary between the widths 400-800px. Then I would write&#8230;
<pre><code class="language-css">
```css
@media (min-width: 400px) and (max-width: 800px) {
.box {
position: relative;
left: calc(3.75vw - 10px) /*After simplifying the equation*/ }
left: calc(3.75vw - 10px) /*After simplifying the equation*/
}
</code></pre>
}
```
That would only make it vary between 400-800px. Now we need to include what happens under 400px and over 800px.
<pre><code class="language-css">
```css
@media (max-width: 400px) {
.box {
position: relative;
left: 5px; }
left: 5px;
}
}
@media (min-width: 400px) and (max-width: 800px) {
.box {
position: relative;
left: calc(3.75vw - 10px); }
left: calc(3.75vw - 10px);
}
}
@media (min-width: 800px) {
.box {
position: relative;
left: 20px; }
left: 20px;
}
</code></pre>
}
```
This is exactly like Mike&#8217;s pen, but instead he uses the equation to adjust the font-size between an upper and lower bound. You can apply this method to anything that accepts calc() and viewport units. Here is my [pen](http://codepen.io/brandonrozek/pen/JoQVEb){.broken_link} showing some use cases. To make your life easier, I made a quick little tool where you can input the variables and it will provide you with a simpler form of the equation to put into your calc() function [here](http://codepen.io/brandonrozek/pen/KpPwGL){.broken_link}.

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@ -5,6 +5,8 @@ date: 2015-05-23T19:59:25+00:00
author: Brandon Rozek
layout: post
guid: http://brandonrozek.com/?p=85
aliases:
- /2015/05/animatable-border/
permalink: /2015/05/animatable-border/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -34,21 +36,16 @@ This post follows well along with my Codepen [demo](http://codepen.io/brandonroz
Border-color animates by splitting the colors to their red, green and blue components and raises/lowers them to it&#8217;s new value. ([Demo](http://codepen.io/brandonrozek/pen/PqzPMe){.broken_link}) ([Spec](http://www.w3.org/TR/css3-transitions/#animtype-color)) Example of animation corresponds to #1 in the pen, but I will rewrite the relevant code here.
<pre><code class="language-css">
```css
@keyframes color {
to { border-color: purple red green blue; }
}
.border-color {
border-color: white;
animation: color .4s ease-in .1s infinite alternate;
}
</code></pre>
```
 
@ -58,44 +55,31 @@ animation: color .4s ease-in .1s infinite alternate;
* Each value corresponds to a corner starting from the top left and going clockwise
* Initial Value: 0
<pre><code class="language-css">
```css
.border-radius {
border-radius: 40% 30% 60% 50% / 20% 40% 60% 80%;
/** is the same as **/
border-top-left-radius: 40% 20%;
border-top-right-radius: 30% 40%;
border-bottom-right-radius: 60% 60%;
border-bottom-left-radius: 50% 80%;
/** where the first value is the horizontal radius and the second value the vertical radius**/
/** where the first value is the horizontal
radius and the second value the vertical radius **/
}
</code></pre>
```
For animation, this corresponds to #2 in the pen I made at the top. I&#8217;ll repeat the relevant code here.
<pre><code class="language-css">
```css
@keyframes radius {
to { border-radius: 20%; }
}
.border-radius {
border-radius: 0;
animation: radius .5s ease-in .1s infinite alternate;
}
</code></pre>
```
 
@ -107,24 +91,27 @@ animation: radius .5s ease-in .1s infinite alternate;
For animation, this corresponds to #3 in the pen I made at the top. I&#8217;ll repeat the relevant code here.
<pre><code class="language-css">
```css
@keyframes width {
to { border-width: .15rem .25rem .15rem .25rem; }
}
.border-width {
border-width: .7rem;
animation: width .5s ease-in .1s infinite alternate;
}
</code></pre>
```
 
### Conclusion
Animations are quite enjoyable. The last box in my Codepen demo tries combining all three of those animations. (Super Wacky!)  You don&#8217;t need to use keyframe animations to achieve this, you can also use the transition property. I used keyframes so you can better visualize what&#8217;s going on. There are plenty of other animatable properties to go through, so I&#8217;ll get started on those. In the meantime, if you want to look at some of the sites I used for research I&#8217;ll include the links below. <https://developer.mozilla.org/en-US/docs/Web/CSS/animation> <http://www.w3.org/TR/css3-transitions/#animatable-css> <https://developer.mozilla.org/en-US/docs/Web/CSS/border-color> <https://developer.mozilla.org/en-US/docs/Web/CSS/border-radius> <https://developer.mozilla.org/en-US/docs/Web/CSS/border-width> <https://docs.webplatform.org/wiki/css/properties/border-color>{.broken_link} <https://docs.webplatform.org/wiki/css/properties/border-radius>{.broken_link} <https://docs.webplatform.org/wiki/css/properties/border-width>{.broken_link}
Animations are quite enjoyable. The last box in my Codepen demo tries combining all three of those animations. (Super Wacky!)  You don&#8217;t need to use keyframe animations to achieve this, you can also use the transition property. I used keyframes so you can better visualize what&#8217;s going on. There are plenty of other animatable properties to go through, so I&#8217;ll get started on those. In the meantime, if you want to look at some of the sites I used for research I&#8217;ll include the links below.
- <https://developer.mozilla.org/en-US/docs/Web/CSS/animation>
- <http://www.w3.org/TR/css3-transitions/#animatable-css>
- <https://developer.mozilla.org/en-US/docs/Web/CSS/border-color>
- <https://developer.mozilla.org/en-US/docs/Web/CSS/border-radius>
- <https://developer.mozilla.org/en-US/docs/Web/CSS/border-width>
- <https://docs.webplatform.org/wiki/css/properties/border-color>{.broken_link}
- <https://docs.webplatform.org/wiki/css/properties/border-radius>{.broken_link}
- <https://docs.webplatform.org/wiki/css/properties/border-width>{.broken_link}

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@ -5,6 +5,8 @@ date: 2015-09-14T12:07:52+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=155
aliases:
- /2015/09/animatable-box-model/
permalink: /2015/09/animatable-box-model/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-03T09:34:08+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=190
aliases:
- /2015/10/animatable-location/
permalink: /2015/10/animatable-location/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-03T08:44:51+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=148
aliases:
- /2015/10/animatable-text/
permalink: /2015/10/animatable-text/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-04T17:50:50+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=210
aliases:
- /2015/10/html-css-javascript-link-together/
permalink: /2015/10/html-css-javascript-link-together/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-10T20:01:20+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=238
aliases:
- /2015/10/javascript-data-types/
permalink: /2015/10/javascript-data-types/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-11T16:52:36+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=297
aliases:
- /2015/10/animatable-visual/
permalink: /2015/10/animatable-visual/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-18T16:32:37+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=337
aliases:
- /2015/10/animatable-transform/
permalink: /2015/10/animatable-transform/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-10-18T18:30:21+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=344
aliases:
- /2015/10/javascript-conditional-statements/
permalink: /2015/10/javascript-conditional-statements/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -32,25 +34,28 @@ This post is part of my lecture series for Math I/O. There is no pre-reading for
To run a block of code when a condition is true, use an <code class="language-javascript">if</code> statement.
<pre><code class="language-javascript"> if (condition) {
```javascript
if (condition) {
doSomething();
}
</code></pre>
```
You can also run a block of code when a condition is false using the <code class="language-javascript">else</code> statement.
<pre><code class="language-javascript"> if (condition) {
```javascript
if (condition) {
doSomething();
} else {
doSomethingElse();
}
</code></pre>
```
### <a href="#switch-statement" name="switch-statement"></a>Switch statement {#switch-statement}
If you want to check a variable for **equality** against multiple different cases, use a <code class="language-javascript">switch</code> statement.
<pre><code class="language-javascript"> switch (variable) {
```javascript
switch (variable) {
case condition1:
doSomething();
break;
@ -61,7 +66,7 @@ If you want to check a variable for **equality** against multiple different case
doSomethingCompletelyDifferent();
break;
}
</code></pre>
```
The default statement runs when the variable doesnt equal any of the cases.
@ -69,10 +74,11 @@ The default statement runs when the variable doesnt equal any of the cases.
To run a block of code over and over again until a condition is false, use a <code class="language-javascript">while</code> loop.
<pre><code class="language-javascript"> while (condition) {
```javascript
while (condition) {
doSomething();
}
</code></pre>
```
Dont forget to include something in the loop that will eventually make the condition <code class="language-javascript">false</code>, otherwise you run into an infinite loop. (Which is a loop that never stops repeating itself; most likely crashing your browser)
@ -80,10 +86,11 @@ Dont forget to include something in the loop that will eventually make the co
If you want to run something a certain amount of times, use a &#8220;<code class="language-javascript">for"</code> loop. For loops can be broken down into three components: an initiating statement, a condition, and a statement that runs after every loop.
<pre><code class="language-javascript"> for (var i = 0; i &lt; 5; i++) {
```javascript
for (var i = 0; i &lt; 5; i++) {
doSomething();
}
</code></pre>
```
Here you have the initiating statement of <code class="language-javascript">var i = 0</code>. From there you check, is <code class="language-javascript">i</code> less than 5? Yes, so then we <code class="language-javascript">doSomething();</code>. After we <code class="language-javascript">doSomething();</code>, we add 1 to <code class="language-javascript">i</code>. Now <code class="language-javascript">i</code> equals 2. Is <code class="language-javascript">i</code> still less than 5? Yes, so we <code class="language-javascript">doSomething();</code>. Then we add 1 to <code class="language-javascript">i</code> again. This loop will keep happening until <code class="language-javascript">i</code> is not less than 5.
@ -91,11 +98,12 @@ Here you have the initiating statement of <code class="language-javascript">var
Having different control/conditional statements helps keep the state of any application youre making. Did the user say not to notify them? Then dont, otherwise (else) notify them. Thats all I have to say for this week. Hope this post helps you get a little more used to this big world called programming.
<pre><code class="language-javascript"> if (youLikeThisPost) {
```javascript
if (youLikeThisPost) {
console.log("Come back next week! :)");
} else {
console.log("Aww that's okay, you should give me another chance next week :)");
}
</code></pre>
```
I recommend that you look at different perspectives of the same concepts. WebCheatSheet.com has a similar post to mine, check out what they had to say [here](http://webcheatsheet.com/javascript/if_else_switch.php).

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@ -5,6 +5,8 @@ date: 2015-10-25T13:48:41+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=350
aliases:
- /2015/10/functions/
permalink: /2015/10/functions/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -27,33 +29,33 @@ Ever had a snippet of code that appears multiple times in different places in yo
To make a function
<pre><code class="language-javascript">
```javascript
var doSomething = function() {
doStuff;
}
</code></pre>
```
To call the above function to execute
<pre><code class="language-javascript">
```javascript
doSomething();
</code></pre>
```
### <a href="#arguments" name="arguments"></a>Arguments {#arguments}
You can also add in arguments (parameters that go inside the paraenthesis next to the word function) for the functions to use.
<pre><code class="language-javascript">
```javascript
var add = function(number1, number2) {
return number1 + number2;
}
</code></pre>
```
And when you use the `return` keyword, like the function above. You can store the value in a variable for future use.
<pre><code class="language-javascript">
```javascript
var total = add(1, 3);
</code></pre>
```
<code class="language-javascript">total</code> here will equal `4`
@ -63,16 +65,16 @@ Functions create their own scope, which means that variables created inside the
The snippet below will output an error like <code class="language-javascript">total is not defined</code>
<pre><code class="language-javascript">
```javascript
var add = function(number1, number2) {
var total = number1 + number2;
}
console.log(total);
</code></pre>
```
Below is a correct example of the concept
<pre><code class="language-javascript">
```javascript
//Function below converts km/hr to m/s
var convert = function(speed) {
var metersPerHour = speed * 1000;
@ -80,13 +82,13 @@ Below is a correct example of the concept
return metersPerSecond;
}
var currentSpeed = convert(5);
</code></pre>
```
Its also important to note that functions can use variables outside of it; granted it resides in the same scope.
Here is an example of a variable that doesn&#8217;t reside in the same scope as the function. (The below code will fail)
<pre><code class="language-javascript">
```javascript
var something = function() {
var x = 5;
var y = 2;
@ -96,17 +98,17 @@ Here is an example of a variable that doesn&#8217;t reside in the same scope as
console.log(x + y);
}
addXandY();
</code></pre>
```
Below, is an example of where the variable does reside in the same scope as the function. Which allows this snippet to execute properly.
<pre><code class="language-javascript">
```javascript
var x = 5;
var addX = function(a) {
return a + x;
}
var sum = addX(6);
</code></pre>
```
<code class="language-javascript">sum</code> here will equal <code class="language-javascript">11</code>

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@ -5,6 +5,8 @@ date: 2015-11-14T15:47:06+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=400
aliases:
- /2015/11/service-workers/
permalink: /2015/11/service-workers/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -33,34 +35,37 @@ You need HTTPS to be able to use service workers on your site. This is mainly fo
Place `service-worker.js` on the root of your site. This is so the service worker can access all the files in the site. Then in your main javascript file, register the service worker.
<pre><code class="language-javascript">
```javascript
if (navigator.serviceWorker) {
navigator.serviceWorker.register('/serviceworker.js', {
scope: '/'
});
}
</code></pre>
```
## <a href="#install-the-service-worker" name="install-the-service-worker"></a>Install the service worker {#install-the-service-worker}
The first time the service worker runs, it emits the `install` event. At this time, we can load the visitors cache with some resources for when theyre offline. Every so often, I like to change up the theme of the site. So I have version numbers attached to my files. I would also like to invalidate my cache with this version number. So at the top of the file I added
<pre><code class="language-javascript">
```javascript
var version = 'v2.0.24:';
</code></pre>
```
Now, to specify which files I want the service worker to cache for offline use. I thought my home page and my offline page would be good enough.
<pre><code class="language-javascript">
```javascript
var offlineFundamentals = [
'/',
'/offline/'
];
</code></pre>
```
Since <code class="language-javascript">cache.addAll()</code> hasnt been implemented yet in any of the browsers, and the polyfill implementation didnt work for my needs. I pieced together my own.
<pre><code class="language-javascript">
```javascript
var updateStaticCache = function() {
return caches.open(version + 'fundamentals').then(function(cache) {
return Promise.all(offlineFundamentals.map(function(value) {
@ -76,7 +81,8 @@ var updateStaticCache = function() {
}))
})
};
</code></pre>
```
Lets go through this chunk of code.
@ -88,11 +94,12 @@ Lets go through this chunk of code.
Now we call it when the `install` event is fired.
<pre><code class="language-javascript">
```javascript
self.addEventListener("install", function(event) {
event.waitUntil(updateStaticCache())
})
</code></pre>
```
With this we now cached all the files in the offlineFundamentals array during the install step.
@ -100,7 +107,7 @@ With this we now cached all the files in the offlineFundamentals array during th
Since were caching everything. If you change one of the files, your visitor wouldnt get the changed file. Wouldnt it be nice to remove old files from the visitors cache? Every time the service worker finishes the install step, it releases an `activate` event. We can use this to look and see if there are any old cache containers on the visitors computer. From [Nicolas code](https://ponyfoo.com/articles/serviceworker-revolution). Thanks for sharing 🙂
<pre><code class="language-javascript">
```javascript
var clearOldCaches = function() {
return caches.keys().then(function(keys) {
return Promise.all(
@ -114,7 +121,8 @@ var clearOldCaches = function() {
);
})
}
</code></pre>
```
1. Check the names of each of the cache containers
2. If they dont start with the correct version number
@ -122,11 +130,12 @@ var clearOldCaches = function() {
Call the function when the `activate` event fires.
<pre><code class="language-javascript">
```javascript
self.addEventListener("activate", function(event) {
event.waitUntil(clearOldCaches())
});
</code></pre>
```
## <a href="#intercepting-fetch-requests" name="intercepting-fetch-requests"></a>Intercepting fetch requests {#intercepting-fetch-requests}
@ -136,7 +145,7 @@ The cool thing about service workers is that it can handle file requests. We
If the visitor started browsing all of the pages on my site, his or her cache would start to get bloated with files. To not burden my visitors, I decided to only keep the latest 25 pages and latest 10 images in the cache.
<pre><code class="language-javascript">
```javascript
var limitCache = function(cache, maxItems) {
cache.keys().then(function(items) {
if (items.length &gt; maxItems) {
@ -144,7 +153,8 @@ var limitCache = function(cache, maxItems) {
}
})
}
</code></pre>
```
Well call it later in the code.
@ -152,7 +162,7 @@ Well call it later in the code.
Every time I fetch a file from the network I throw it into a specific cache container. <code class="language-javascript">'pages'</code> for HTML files, <code class="language-javascript">'images'</code> for CSS files, and <code class="language-javascript">'assets'</code> for any other file. This is so I can handle the cache limiting above easier. Defined within the `fetch` event.
<pre><code class="language-javascript">
```javascript
var fetchFromNetwork = function(response) {
var cacheCopy = response.clone();
if (event.request.headers.get('Accept').indexOf('text/html') != -1) {
@ -172,16 +182,15 @@ var fetchFromNetwork = function(response) {
cache.put(event.request, cacheCopy);
});
}
return response;
}
</code></pre>
```
### <a href="#when-the-network-fails" name="when-the-network-fails"></a>When the network fails {#when-the-network-fails}
There are going to be times where the visitor cannot access the website. Maybe they went in a tunnel while they were riding a train? Or maybe your site went down. I thought it would be nice for my readers to be able to look over my blog posts again regardless of an internet connection. So I provide a fall-back. Defined within the `fetch` event.
<pre><code class="language-javascript">
```javascript
var fallback = function() {
if (event.request.headers.get('Accept').indexOf('text/html') != -1) {
return caches.match(event.request).then(function (response) {
@ -191,7 +200,8 @@ var fallback = function() {
return new Response('&lt;svg width="400" height="300" role="img" aria-labelledby="offline-title" viewBox="0 0 400 300" xmlns="http://www.w3.org/2000/svg"&gt;&lt;title id="offline-title"&gt;Offline&lt;/title&gt;&lt;g fill="none" fill-rule="evenodd"&gt;&lt;path fill="#D8D8D8" d="M0 0h400v300H0z"/&gt;&lt;text fill="#9B9B9B" font-family="Helvetica Neue,Arial,Helvetica,sans-serif" font-size="72" font-weight="bold"&gt;&lt;tspan x="93" y="172"&gt;offline&lt;/tspan&gt;&lt;/text&gt;&lt;/g&gt;&lt;/svg&gt;', { headers: { 'Content-Type': 'image/svg+xml' }});
}
}
</code></pre>
```
1. Is the request for a HTML file?
* Show the [offline](https://brandonrozek.com/offline/) page.
@ -202,20 +212,22 @@ var fallback = function() {
First off, Im only handling GET requests.
<pre><code class="language-javascript">
```javascript
if (event.request.method != 'GET') {
return;
}
</code></pre>
```
For HTML files, grab the file from the network. If that fails, then look for it in the cache. _Network then cache strategy_
<pre><code class="language-javascript">
```javascript
if (event.request.headers.get('Accept').indexOf('text/html') != -1) {
event.respondWith(fetch(event.request).then(fetchFromNetwork, fallback));
return;
}
</code></pre>
```
For non-HTML files, follow this series of steps
@ -226,13 +238,14 @@ For non-HTML files, follow this series of steps
_Cache then network strategy_
<pre><code class="language-javascript">
```javascript
event.respondWith(
caches.match(event.request).then(function(cached) {
return cached || fetch(event.request).then(fetchFromNetwork, fallback);
})
)
</code></pre>
```
For different stategys, take a look at Jake Archibalds [offline cookbook](https://jakearchibald.com/2014/offline-cookbook/).
@ -240,7 +253,7 @@ For different stategys, take a look at Jake Archibalds [offline cookbook](
With all of that, we now have a fully functioning offline-capable website! I wouldnt be able to implement this myself if it wasnt for some of the awesome people I mentioned earlier sharing their experience. So share, share, share! With that sentiment, Ill now share the full code for `service-worker.js` **Update:** There is a new version of this code over at this [blog post](https://brandonrozek.com/2015/11/limiting-cache-service-workers-revisited/).
<pre><code class="language-javascript">
```javascript
var version = 'v2.0.24:';
var offlineFundamentals = [
@ -359,4 +372,4 @@ self.addEventListener("fetch", function(event) {
self.addEventListener("activate", function(event) {
event.waitUntil(clearOldCaches())
});
</code></pre>
```

View file

@ -5,6 +5,8 @@ date: 2015-11-15T12:46:14+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=398
aliases:
- /2015/11/fractions-js/
permalink: /2015/11/fractions-js/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,11 @@ date: 2015-11-30T00:34:15+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=449
aliases:
- /2015/11/limiting-cache-service-workers-revisited/
- /2015/11/limiting-cache-service-workers-revisited1/
- /2015/11/limiting-cache-service-workers-revisited2/
- /2015/11/limiting-cache-service-workers-revisited3/
permalink: /2015/11/limiting-cache-service-workers-revisited3/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -27,7 +32,7 @@ Summary: I rewrote how cache limiting works to address a few problems listed lat
I wrote a function in my [previous service worker post](https://brandonrozek.com/2015/11/service-workers/) to help limit the cache. Here&#8217;s a reminder of what it looked like.
<pre><code class="language-javascript">
```javascript
var limitCache = function(cache, maxItems) {
cache.keys().then(function(items) {
if (items.length &gt; maxItems) {
@ -35,7 +40,7 @@ var limitCache = function(cache, maxItems) {
}
})
}
</code></pre>
```
### The Problem
@ -45,7 +50,7 @@ Jeremy Keith updated the service worker on his site and noticed that the images
Jeremy wrote a function to help trim the cache and asked when it would be appropriate to apply it.
<pre><code class="language-javascript">
```javascript
var trimCache = function (cacheName, maxItems) {
caches.open(cacheName)
.then(function (cache) {
@ -58,11 +63,11 @@ var trimCache = function (cacheName, maxItems) {
});
});
};
</code></pre>
```
And that got me thinking. In what situations is this problem more likely to occur? This particular problem happens when a lot of files are being called asynchronously. This problem doesn&#8217;t occur when only one file is being loaded. So when do we load a bunch of files? During page load. During page load, the browser might request css, javascript, images, etc. Which for most [websites](http://royal.pingdom.com/2011/11/21/web-pages-getting-bloated-here-is-why/), is a lot of files. Let&#8217;s now move our focus back to the humble script.js. Before, the only role it played with service workers was registering the script. However, if we can get the script to notify the service worker when the page is done loading, then the service worker will know when to trim the cache.
<pre><code class="language-javascript">
```javascript
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('https://yourwebsite.com/serviceworker.js', {scope: '/'});
}
@ -71,11 +76,11 @@ window.addEventListener("load", function() {
navigator.serviceWorker.controller.postMessage({"command":"trimCache"});
}
});
</code></pre>
```
Why <code class="language-javascript">if (navigator.serviceWorker.controller != null)</code>? Service Workers don&#8217;t take control of the page immediately but on subsequent page loads, Jake Archibald [explains](https://jakearchibald.com/2014/using-serviceworker-today/). When the service worker does have control of the page however, we can use the [postMessage api](https://developer.mozilla.org/en-US/docs/Web/API/Worker/postMessage) to send a message to the service worker. Inside, I provided a json with a &#8220;command&#8221; to &#8220;trimCache&#8221;. Since we send the json to the service worker, we need to make sure that it can receive it.
Why `if (navigator.serviceWorker.controller != null)` Service Workers don&#8217;t take control of the page immediately but on subsequent page loads, Jake Archibald [explains](https://jakearchibald.com/2014/using-serviceworker-today/). When the service worker does have control of the page however, we can use the [postMessage api](https://developer.mozilla.org/en-US/docs/Web/API/Worker/postMessage) to send a message to the service worker. Inside, I provided a json with a &#8220;command&#8221; to &#8220;trimCache&#8221;. Since we send the json to the service worker, we need to make sure that it can receive it.
<pre><code class="language-javascript">
```javascript
self.addEventListener("message", function(event) {
var data = event.data;
@ -85,7 +90,7 @@ self.addEventListener("message", function(event) {
trimCache(version + "assets", 30);
}
});
</code></pre>
```
Once it receives the command, it goes on to trim all of the caches.
@ -93,7 +98,7 @@ Once it receives the command, it goes on to trim all of the caches.
So whenever you download a bunch of files, make sure to run <code class="language-javascript">navigator.serviceWorker.controller.postMessage({"command":"trimCache"});</code> on the main javascript file to trim the cache. A downside to this method is that since Service Workers don&#8217;t take control during the first page load, the cache isn&#8217;t trimmed until the second page load. If you can find a way to make it so that this event happens in the first page load [tell me](mailto:hello@brandonrozek.com) about it/write a blog post. 🙂 **Update:** To get the service worker to take control of the page immediately call [self.skipWaiting()](https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/skipWaiting) after the install event and [self.clients.claim()](https://developer.mozilla.org/en-US/docs/Web/API/Clients/claim) after the activate event. Current code for our humble service worker:
<pre><code class="language-javascript">
```javascript
var version = 'v2.0.24:';
var offlineFundamentals = [
@ -233,9 +238,9 @@ self.addEventListener("activate", function(event) {
})
);
});
</code></pre>
```
<pre><code class="language-javascript">
```javascript
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('https://brandonrozek.com/serviceworker.js', {scope: '/'});
}
@ -244,4 +249,4 @@ window.addEventListener("load", function() {
navigator.serviceWorker.controller.postMessage({"command":"trimCache"});
}
});
</code></pre>
```

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@ -5,6 +5,8 @@ date: 2015-12-22T15:13:44+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=572
aliases:
- /2015/12/playing-with-qr-codes/
permalink: /2015/12/playing-with-qr-codes/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2015-12-27T15:17:12+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=599
aliases:
- /2015/12/creating-vcards-from-h-cards/
permalink: /2015/12/creating-vcards-from-h-cards/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2016-08-16T23:37:09+00:00
author: Brandon Rozek
layout: post
guid: http://brandonrozek.com/?p=919
aliases:
- /2016/08/pass-password-manager/
permalink: /2016/08/pass-password-manager/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";s:2:"no";s:2:"id";N;s:21:"follower_notification";s:3:"yes";s:7:"license";s:19:"all-rights-reserved";s:14:"publication_id";s:2:"-1";s:6:"status";s:4:"none";s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-03-07T04:29:50+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2090
aliases:
- /2017/03/knit-document-rstudio/
permalink: /2017/03/knit-document-rstudio/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-03-07T21:50:52+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2095
aliases:
- /2017/03/uniformity-math-random/
permalink: /2017/03/uniformity-math-random/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -38,9 +40,9 @@ The website works by producing a random number using <code class='language-javas
This website produces a file with all the numbers separated by a comma. We want these commas to be replaced by newlines. To do so, we can run a simple command in the terminal
<pre class='language-bash'><code class='language-bash'>
```bash
grep -oE '[0-9]+' Random.csv &gt; Random_corrected.csv
</code></pre>
```
Do this with all three files and make sure to keep track of which is which.
@ -62,22 +64,28 @@ Since all of the conditions are met, we can use the Chi-square test of Goodness
For the rest of the article, we will use R for analysis. Looking at the histograms for the three browsers below. The random numbers all appear to occur uniformly
<pre class="language-R"><code class='language-R'>rm(list=ls())
```R
rm(list=ls())
chrome = read.csv("~/Chrome_corrected.csv", header = F)
firefox = read.csv("~/Firefox_corrected.csv", header = F)
ie11 = read.csv("~/IE11_corrected.csv", header = F)
</code></pre>
```
<pre class="language-R"><code class='language-R'>
hist(ie11$V1, main = "Distribution of Random Values for IE11", xlab = "Random Value")</code></pre>
```R
hist(ie11$V1, main = "Distribution of Random Values for IE11", xlab = "Random Value")
```
![](https://brandonrozek.com/wp-content/uploads/2017/03/ie11hist.png)
<pre class="language-R"><code class='language-R'>hist(firefox$V1, main = "Distribution of Random Values for Firefox", xlab = "Random Value")</code></pre>
```R
hist(firefox$V1, main = "Distribution of Random Values for Firefox", xlab = "Random Value")
```
![](https://brandonrozek.com/wp-content/uploads/2017/03/firefoxhist.png)
<pre class="language-R"><code class='language-R'>hist(chrome$V1, main = "Distribution of Random Values for Chrome", xlab = "Random Value")</code></pre>
```R
hist(chrome$V1, main = "Distribution of Random Values for Chrome", xlab = "Random Value")
```
![](https://brandonrozek.com/wp-content/uploads/2017/03/chromehist.png)
@ -85,23 +93,25 @@ hist(ie11$V1, main = "Distribution of Random Values for IE11", xlab = "Random Va
Before we run our test, we need to convert the quantatative data to count data by using the plyr package
<pre class="language-R"><code class='language-R'>#Transform to count data
```R
#Transform to count data
library(plyr)
chrome_count = count(chrome)
firefox_count = count(firefox)
ie11_count = count(ie11)
</code></pre>
```
Run the tests
<pre class='language-R'><code class='language-R'>
```R
# Chi-Square Test for Goodness-of-Fit
chrome_test = chisq.test(chrome_count$freq)
firefox_test = chisq.test(firefox_count$freq)
ie11_test = chisq.test(ie11_count$freq)
# Test results
chrome_test</code></pre>
chrome_test
```
As you can see in the test results below, we fail to reject the null hypothesis at a 5% significance level because all of the p-values are above 0.05.
@ -111,7 +121,7 @@ As you can see in the test results below, we fail to reject the null hypothesis
## data: chrome_count$freq
## X-squared = 101.67, df = 99, p-value = 0.4069
<pre class="r"><code>firefox_test</code></pre>
`firefox_test`
##
## Chi-squared test for given probabilities
@ -119,7 +129,7 @@ As you can see in the test results below, we fail to reject the null hypothesis
## data: firefox_count$freq
## X-squared = 105.15, df = 99, p-value = 0.3172
<pre class="r"><code>ie11_test</code></pre>
`ie11_test`
##
## Chi-squared test for given probabilities
@ -129,4 +139,4 @@ As you can see in the test results below, we fail to reject the null hypothesis
## Conclusion
At a 5% significance level, we fail to obtain enough evidence to suggest that the distribution of random number is not uniform. This is a good thing since it shows us that our random number generators give all numbers an equal chance of being represented. We can use <code class='language-javascript'>Math.random()</code> with ease of mind.
At a 5% significance level, we fail to obtain enough evidence to suggest that the distribution of random number is not uniform. This is a good thing since it shows us that our random number generators give all numbers an equal chance of being represented. We can use `Math.random()` with ease of mind.

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@ -5,6 +5,8 @@ date: 2017-03-09T02:09:58+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2115
aliases:
- /2017/03/simplifying-expressions-octave/
permalink: /2017/03/simplifying-expressions-octave/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-03-14T05:31:21+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2089
aliases:
- /2017/03/monte-carlo-pi/
permalink: /2017/03/monte-carlo-pi/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
@ -60,7 +62,7 @@ This will allow us to perform a pooled empiricle probability on the simulations
Meaning the area of the circle will be the number of times that the inequality was satisfied $$A_{circle} = \# Successes$$
And the area of the square will be the number of times the simulation was run, since the random numbers generated will always be between 0 and 1 $$A_{square} = \# Trials$$
And the area of the square will be the number of times the simulation was run, since the random numbers generated will always be between 0 and 1 $A_{square} = \# Trials$
Recall that taking the ratio of the area of the circle and the area of the square is a fourth of pi. $$\frac{\frac{1}{4} \pi}{1} = \frac{1}{4} \pi$$
@ -68,13 +70,14 @@ Multiply this number by 4 and you get the value for pi.
This tells us that four times the probability that the randomly generated point is in the circle is equal to pi.
$$\pi = 4 \* (Probability\ of\ being\ inside\ circle) = 4 \* \frac{\# Success}{\# Trials} = 4 * \frac{A\_{circle}}{A\_{square}}$$
$$\pi = 4 * (Probability\ of\ being\ inside\ circle) = 4 * \frac{\# Success}{\# Trials} = 4 * \frac{A\_{circle}}{A\_{square}}$$
## Implementation
For the Monte Carlo simulation I used Java. The BigDecimal implementation was used so that there wouldn&#8217;t be any issue with integer size limits
<pre class='language-java'><code class='language-java'>/** Calculates Pi
```java
/** Calculates Pi
* @author Brandon Rozek
*/
// Big Integers are used so we don't run into the integer size limit
@ -104,17 +107,18 @@ for (; trials.compareTo(numTrials) &lt; 0; trials = trials.add(BigInteger.ONE))
successes = successes.add(BigInteger.ONE);
}
}
</code></pre>
```
And then we finalize it with a quick calculation of pi
<pre class='language=java'><code class='language-java'>// (Number of successes) / (Number of trials) * 4 gives the approximation for pi
```java
// (Number of successes) / (Number of trials) * 4 gives the approximation for pi
BigDecimal pi = new BigDecimal(successes)
.divide(new BigDecimal(trials))
.multiply(new BigDecimal("4"));
System.out.println("The calculated value of pi is: " + pi);
}}
</code></pre>
```
## Conclusion

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@ -5,6 +5,8 @@ date: 2017-05-24T15:59:45+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2174
aliases:
- /2017/05/viewing-java-applets/
permalink: /2017/05/viewing-java-applets/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-06-05T23:30:18+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2198
aliases:
- /2017/06/java-swing-components/
permalink: /2017/06/java-swing-components/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-06-05T20:36:22+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2192
aliases:
- /2017/06/using-system-themes-java-swing/
permalink: /2017/06/using-system-themes-java-swing/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-08-28T17:12:00+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2236
aliases:
- /2017/08/escape-sequences-java/
permalink: /2017/08/escape-sequences-java/
medium_post:
- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'

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@ -5,6 +5,8 @@ date: 2017-08-28T17:37:59+00:00
author: Brandon Rozek
layout: post
guid: https://brandonrozek.com/?p=2241
aliases:
- /2017/08/obtaining-command-line-input-java/
permalink: /2017/08/obtaining-command-line-input-java/
medium_post:
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