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History

Rich Trott e313c0286b tools: update to ESLint 3.2.2 PR-URL: https://github.com/nodejs/node/pull/7999 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Johan Bergström <bugs@bergstroem.nu>		2016-08-09 21:19:02 -07:00
..
index.js	tools: update eslint to v1.10.3	2016-01-13 23:15:39 +01:00
license	tools: update eslint to v1.10.3	2016-01-13 23:15:39 +01:00
package.json	tools: update to ESLint 3.2.2	2016-08-09 21:19:02 -07:00
readme.md	tools: update ESLint to 2.9.0	2016-05-04 10:26:25 -07:00

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.