defined

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

Changelog

v1.0.1 - 2022-10-12

Commits

• [eslint] fix indentation 84801c0
• [readme] rename, add badges 7ccb011
• [actions] add reusable workflows 03917f0
• [Dev Deps] update tape ac57011
• [eslint] add eslint 9bf7583
• [meta] add auto-changelog ec13b5f
• [meta] use npmignore to autogenerate an npmignore file 549e1ff
• Only apps should have lockfiles 11dfedc
• [meta] add safe-publish-latest efadc76
• [meta] update URLs aa9c486
• [Tests] add aud in posttest a0cf2fb
• [meta] create FUNDING.yml; add funding in package.json b05fc5e