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zhfish / api-cheatsheet-array.md
Created April 18, 2018 05:11 — forked from rauschma/api-cheatsheet-array.md

Array<T>

Legend:

  • ✏️ method changes this.
  • 🔒 method does not change this.

Array<T>.prototype.*:

  • concat(...items: Array): T[] 🔒 ES3
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zhfish / string.md
Created April 18, 2018 05:11 — forked from rauschma/string.md

Strings

String.prototype.*

None of the string methods modify this – they always return fresh strings.

  • charAt(pos: number): string ES1

    Returns the character at index pos, as a string (JavaScript does not have a datatype for characters). str[i] is equivalent to str.charAt(i) and more concise (caveat: may not work on old engines).