You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
林华焜
b6f8f922cf
|
4 years ago | |
|---|---|---|
| .. | ||
| example | 4 years ago | |
| test | 4 years ago | |
| .travis.yml | 4 years ago | |
| LICENSE | 4 years ago | |
| index.js | 4 years ago | |
| package.json | 4 years ago | |
| readme.markdown | 4 years ago | |
readme.markdown
defined
return the first argument that is !== undefined
Most of the time when I chain together ||s, I actually just want the first
item that is not undefined, not the first non-falsy item.
This module is like the defined-or (//) operator in perl 5.10+.
example
var defined = require('defined');
var opts = { y : false, w : 4 };
var x = defined(opts.x, opts.y, opts.w, 100);
console.log(x);
$ node example/defined.js
false
The return value is false because false is the first item that is
!== undefined.
methods
var defined = require('defined')
var x = defined(a, b, c...)
Return the first item in the argument list a, b, c... that is !== undefined.
If all the items are === undefined, return undefined.
install
With npm do:
npm install defined
license
MIT