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jashkenas--coffeescript/documentation/sections/slices.md
Geoffrey Booth e620434a2e Docs improvements: content in Markdown, organization into subtemplates, fixed tests (#4401)
* Replace tiny bitmaps with base64-encoded URIs

* Optimize SVGs; replace logo PNG with SVG

* Modernize favicon

* Embed CSS; a bit unorthodox, but we’re a single page so there’s no point in separate .css files and their separate HTTP requests

* Documentation is now markdown, converted to HTML on compilation

* Render the examples when we’re rendering index.html; they compile so quickly that there’s no need to pre-render them and save the intermediate .js files

* Split apart index.html into components that Cakefile assembles, so that we can add in logic to include different files for v1 versus v2

* Split building index.html and building test.html into two tasks; collapse the parts of `releaseHeader` into one compact function

* Move include logic into templates

* Get error messages tests to work in the browser

* Update output index.html

* Split body into nav and body

* Watch subtemplates

* Revert "Split body into nav and body"

This reverts commit ec9e559ec0.

* Add marked

* Update gitignore

* Use idiomatic markdown output for code blocks (<pre><code>)

* Handle ids within the template, not in the Cakefile; remove marked’s auto-generated and conflicting ids

* Move the `codeFor` function into versioned folders, so that v1 and v2 docs can have different example code blocks/editors

* Update packages, including new highlight.js which supports our newer keywords and triple backticks (docs output is unchanged)
2016-12-15 21:05:44 -08:00

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Array Slicing and Splicing with Ranges

Ranges can also be used to extract slices of arrays. With two dots (3..6), the range is inclusive (3, 4, 5, 6); with three dots (3...6), the range excludes the end (3, 4, 5). Slices indices have useful defaults. An omitted first index defaults to zero and an omitted second index defaults to the size of the array.

codeFor('slices', 'middle')

The same syntax can be used with assignment to replace a segment of an array with new values, splicing it.

codeFor('splices', 'numbers')

Note that JavaScript strings are immutable, and cant be spliced.