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49809a03 Merge commit '20a631b4964fc0ab9137cce1e41774cbc17de044' 20a631b4 Squashed 'themes/gohugoioTheme/' changes from b8202f539..dafc91ff1 8b58f565 Re-generate CLI docs 4653a724 Add Netlify deployment badge 2d6246bc Remove some deprecated site variables e6777153 Improve Algolia Search Display Styling 1570999f Add missing "." in front of gitlab-ci.yaml example b922ae7d This adds documentation to the new configDir/Environment logic from .53 (#729) 7cff379f Correctly escape multi-word taxonomy terms in example 2dfeeda4 fix typo by removing stray paren 0870bd9a Fix typo in `paginate` description 91e8be85 Fixes https://github.com/gohugoio/hugo/issues/5609 c1db65ec Make the dummy URL more obvious b4589ff0 Fix a link b73dcb9a Consistently use "posts" as section name in examples 7a56abbc Format definitions a9c6fd9b Minor clarification over the last commit 5c86bdc8 Add alternative instructions for Quick Start for non-git users dafe7ee9 Add Visual Studio Code plug-ins 110ed19e Update HUGO_VERSION 2abd031a Update page.md b332f7b9 Update page.md f5a8c9d4 Update static-files.md 6d0c155c Add note about relative protocol URLs a13751ac Theme Warning: Remove note about unquoted URLs 4c8f7d68 Incorporate feedback 6f2b9cf0 Update Creating Themes Warning 40d88d98 Fix ToC example to use binary true/false 4a11f3f1 Fix typo 2dbfc0a4 Fix a typo in taxonomies d63790ef Do not mark UndocumentedFeature issues as stale d7aff095 Regenerate docs.json 71c0826f Update transform.Unmarshal.md git-subtree-dir: docs git-subtree-split: 49809a038b2691637bab7f3f2e385dde654a88b8
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| title | linktitle | description | godocref | date | publishdate | lastmod | categories | keywords | signature | workson | hugoversion | relatedfuncs | deprecated | toc | aliases | |||||
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| len | len | Returns the length of a variable according to its type. | https://golang.org/pkg/builtin/#len | 2017-02-01 | 2017-02-01 | 2017-04-18 |
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len is a built-in function in Go that returns the length of a variable according to its type. From the Go documentation:
Array: the number of elements in v.
Pointer to array: the number of elements in *v (even if v is nil).
Slice, or map: the number of elements in v; if v is nil, len(v) is zero.
String: the number of bytes in v.
Channel: the number of elements queued (unread) in the channel buffer; if v is nil, len(v) is zero.
len is also considered a fundamental function for Hugo templating.
len Example 1: Longer Headings
You may want to append a class to a heading according to the length of the string therein. The following templating checks to see if the title's length is greater than 80 characters and, if so, adds a long-title class to the <h1>:
{{< code file="check-title-length.html" >}}
{{.Title}} {{< /code >}}len Example 2: Counting Pages with where
The following templating uses where in conjunction with len to
figure out the total number of content pages in a posts section:
{{< code file="how-many-posts.html" >}} {{ $posts := (where .Site.RegularPages "Section" "==" "posts") }} {{ $postCount := len $posts }} {{< /code >}}
Note the use of .RegularPages, a site variable that counts all regular content pages but not the _index.md pages used to add front matter and content to list templates.