mirror of
https://github.com/Brandon-Rozek/website.git
synced 2024-11-09 18:50:34 -05:00
128 lines
4.5 KiB
HTML
128 lines
4.5 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8" />
|
|
<meta name="author" content="Brandon Rozek">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
|
<meta name="robots" content="noindex" />
|
|
<title>Brandon Rozek</title>
|
|
<link rel="stylesheet" href="themes/bitsandpieces/styles/main.css" type="text/css" />
|
|
<link rel="stylesheet" href="themes/bitsandpieces/styles/highlightjs-github.css" type="text/css" />
|
|
</head>
|
|
<body>
|
|
|
|
<aside class="main-nav">
|
|
<nav>
|
|
<ul>
|
|
<li class="menuitem ">
|
|
<a href="index.html%3Findex.html" data-shortcut="">
|
|
Home
|
|
</a>
|
|
</li>
|
|
<li class="menuitem ">
|
|
<a href="index.html%3Fcourses.html" data-shortcut="">
|
|
Courses
|
|
</a>
|
|
</li>
|
|
<li class="menuitem ">
|
|
<a href="index.html%3Flabaide.html" data-shortcut="">
|
|
Lab Aide
|
|
</a>
|
|
</li>
|
|
<li class="menuitem ">
|
|
<a href="index.html%3Fpresentations.html" data-shortcut="">
|
|
Presentations
|
|
</a>
|
|
</li>
|
|
<li class="menuitem ">
|
|
<a href="index.html%3Fresearch.html" data-shortcut="">
|
|
Research
|
|
</a>
|
|
</li>
|
|
<li class="menuitem ">
|
|
<a href="index.html%3Ftranscript.html" data-shortcut="">
|
|
Transcript
|
|
</a>
|
|
</li>
|
|
</ul>
|
|
</nav>
|
|
</aside>
|
|
<main class="main-content">
|
|
<article class="article">
|
|
<h1>Lecture for March 13th</h1>
|
|
<h2>Methods</h2>
|
|
<p>Methods are small blocks of statements that make it easier to solve a problem. It usually focuses on solving a small part of the overall problem.</p>
|
|
<p>Usually in methods you provide some sort of input and get some output out of it.</p>
|
|
<h3>Advantages</h3>
|
|
<ul>
|
|
<li>Code readability</li>
|
|
<li>Modular program development (break up the problem in chunks)</li>
|
|
<li>Incremental development</li>
|
|
<li>No redundant code!</li>
|
|
</ul>
|
|
<h3>Method definition</h3>
|
|
<p>Consists of a method name, input and output and the block of statements.</p>
|
|
<p>Usually this is succinctly written using JavaDocs which is what you see in the JavaAPI</p>
|
|
<h3>Method Call</h3>
|
|
<p>A method call is the execution of the method. The statements defined in the method is what will execute.</p>
|
|
<h3>Method Stubs</h3>
|
|
<p>Recall from method definition the parts of the method definition. Now look at the following method</p>
|
|
<pre><code class="language-java">String[] split(String s)</code></pre>
|
|
<p>The output here is <code>String[]</code></p>
|
|
<p>The method name is <code>split</code></p>
|
|
<p>The input is <code>String s</code></p>
|
|
<h2>Modular Programming</h2>
|
|
<p>Let us look at the following example:</p>
|
|
<p>The program should have a list of grocery prices. It should be able to calculate the total cost of groceries. The store gives a student discount of 5%. The program should calculate this discount and update the total, it should calculate and add the 2.5% tax.</p>
|
|
<ul>
|
|
<li>First you should add it all up</li>
|
|
<li>Then compute the discount</li>
|
|
<li>Then add the tax</li>
|
|
</ul>
|
|
<h2>Parts of a method definition</h2>
|
|
<pre><code class="language-java">public static int timesTwo(int num) {
|
|
int two = num * 2;
|
|
return two;
|
|
}</code></pre>
|
|
<p>It first starts off by declaring the visibility <code>public</code></p>
|
|
<p>The return type if <code>int</code></p>
|
|
<p>The method name is <code>timesTwo</code></p>
|
|
<p>The input parameter is <code>int num</code></p>
|
|
<p>Between the curly braces is the <em>body</em> of the method</p>
|
|
<h2>Calling a Method</h2>
|
|
<pre><code class="language-java">int a = 5;
|
|
int b = 3;
|
|
|
|
int ans = multiply(a, b)</code></pre>
|
|
<p>The method call is <code>multiply(a, b)</code> and the result is stored in the variable <code>ans</code></p>
|
|
</article>
|
|
</main>
|
|
|
|
<script src="themes/bitsandpieces/scripts/highlight.js"></script>
|
|
<script src="themes/bitsandpieces/scripts/mousetrap.min.js"></script>
|
|
<script type="text/x-mathjax-config">
|
|
MathJax.Hub.Config({
|
|
tex2jax: {
|
|
inlineMath: [ ['$','$'], ["\\(","\\)"] ],
|
|
processEscapes: true
|
|
}
|
|
});
|
|
</script>
|
|
|
|
<script type="text/javascript"
|
|
src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
|
|
</script>
|
|
<script>
|
|
hljs.initHighlightingOnLoad();
|
|
|
|
document.querySelectorAll('.menuitem a').forEach(function(el) {
|
|
if (el.getAttribute('data-shortcut').length > 0) {
|
|
Mousetrap.bind(el.getAttribute('data-shortcut'), function() {
|
|
location.assign(el.getAttribute('href'));
|
|
});
|
|
}
|
|
});
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|