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39a7fac34 Add .hugo_build.lock to .gitignore 920c716a4 fix a typo: to -> two (#1545) 6f0ba9593 Remove godocref from front matter (#1543) 8ec3d5948 remove link to wercker (#1544) b56008719 Delete deployment-with-wercker.md (#1542) e33d29b02 Fix broken links (#1538) 29e9d4c21 Sort commenting systems (#1541) 0b7ea60a7 Delete the news page "HTTP/2 Server Push in Hugo" 6e1515857 Fix quick-start.md (#1525) 62168ab35 Update comments.md (#1535) d92191512 Small typo (#1539) 129c8834a Correct the PostCSS noMap default value (#1534) 6a5b29fcc Add example to index function (#1536) e3dd8c507 Update output-formats.md 0c9321ca0 Remove reference to using LiveReload in production environment 4072d6776 Mod testing 09fabf7d6 Fix typo (#1524) 2fce813c8 Fix grammatical error in quick-start.md (#1523) 45230ab4a Hugo Mod testing 2dd4cd9e7 Update index.md 2c3ed62fd netlify: Bump to 0.88.1 648e2a007 Merge branch 'tempv0.88.1' f216eade1 releaser: Add release notes to /docs for release of 0.88.1 8a7b64d4b Fix typographical errors in 0.88.0 release notes a4bf86300 Release 0.88 738bb8f38 releaser: Add release notes to /docs for release of 0.88.0 8fcf2c55d highlight: Remove some pygments references f2b173de2 HTTPS link c88881c8e Adding link to nginx documentation 6b0a74fe0 Fix typos in docs (#1516) 498b8f0f1 Fix typos in time.Format (#1515) 28723fad6 Fix taxonomy and term examples (#1514) 3ffd00e12 Update front-matter.md 7cc1da82e Fix grammar in 0.86.1 release notes (#1510) 0009c51c3 Update docs helper 7e2f430f4 Update index.md 7857eae7e releaser: Add release notes to /docs for release of 0.87.0 1f08b684b releaser: Add release notes to /docs for release of 0.87.0 36a9e701c docs: Adjust config docs 0f588438e docs: Regen CLI docs 1b4682cd8 docs: Regen docs helper bc8bbaae9 Merge commit 'bd77f6e1c99e04a476f0b1bb4e44569134e02399' into release-0.87.0 6f2480643 docs: Adjust time zone docs git-subtree-dir: docs git-subtree-split: 39a7fac343c289906db644c96079fdcc0298582f
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| len | len | Returns the length of a variable according to its type. | 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.