History

Rich Trott d7ce99214d tools: update ESLint, fix unused vars bug Update ESLint to 3.0.0. This includes an enhancement to `no-unused-vars` such that it finds a few instances in our code base that it did not find previously (fixed in previous commits readying this for landing). PR-URL: https://github.com/nodejs/node/pull/7601 Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io>		2016-07-14 12:44:58 -07:00
..
index.js	tools: update eslint to v1.10.3	2016-02-15 11:30:23 -08:00
license	tools: update eslint to v1.10.3	2016-02-15 11:30:23 -08:00
package.json	tools: update ESLint, fix unused vars bug	2016-07-14 12:44:58 -07:00
readme.md	tools: update eslint to v1.10.3	2016-02-15 11:30:23 -08:00

onetime

Only call a function once

When called multiple times it will return the return value from the first call.

Unlike the module once, this one isn't naughty extending Function.prototype.

Install

$ npm install --save onetime

let i = 0;

const foo = onetime(() => i++);

foo(); //=> 0
foo(); //=> 0
foo(); //=> 0

Type: function

Function that should only be called once.

Type: boolean Default: false

Set to true if you want it to fail with a nice and descriptive error when called more than once.