Dart

HTML Canvas

Redis

Bash

JavaScript

XPath Selectors

Order selectors

Xpath	CSS
`//ul/li[1]`	ul > li:first-child
`//ul/li[2]`	ul > li:nth-child(2)
`//ul/li[last()]`	ul > li:last-child
`//li[@id="id"][1]`	li#id:first-child
`//a[1]`	a:first-child
`//a[last()]`	a:last-child

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