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has-values

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Install

Install with npm:

$ npm install --save has-values

Usage

var hasValue = require('has-values');

hasValue('a');
//=> true

hasValue('');
//=> false

hasValue(1);
//=> true

hasValue(0);
//=> false

hasValue({a: 'a'}});
//=> true

hasValue({});
hasValue({foo: undefined});
//=> false

hasValue({foo: null});
//=> true

hasValue(['a']);
//=> true

hasValue([]);
hasValue(], [);
hasValue([]);
//=> false

hasValue(['foo']);
hasValue([0]);
//=> true

hasValue(function(foo) {}); 
//=> true

hasValue(function() {});
//=> true

hasValue(true);
//=> true

hasValue(false);
//=> true

isEmpty

To test for empty values, do:

function isEmpty(o, isZero) {
  return !hasValue(o, isZero);
}

Release history

v1.0.0

zero always returns true
array now recurses, so that an array of empty arrays will return false
null now returns true

About

Related projects

has-value: Returns true if a value exists, false if empty. Works with deeply nested values using… more | homepage
is-number: Returns true if the value is a number. comprehensive tests. | homepage
is-plain-object: Returns true if an object was created by the Object constructor. | homepage
isobject: Returns true if the value is an object and not an array or null. | homepage
kind-of: Get the native type of a value. | homepage

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

Building docs

(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)

To generate the readme, run the following command:

$ npm install -g verbose/verb#dev verb-generate-readme && verb

Running tests

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

$ npm install && npm test

Author

Jon Schlinkert

License

This file was generated by verb-generate-readme, v0.6.0, on May 19, 2017.

README.md