has-values

has-values

Returns true if a value exists, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays. Other libs do this, but I needed one that would optionally not treat zero as empty. Also, this works with booleans and other values that other libs fail to test properly.

Install with npm

npm i has-values --save

Running tests

Install dev dependencies.

npm i -d && npm test

Usage

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

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

hasValue('');
//=> false

hasValue(1);
//=> true

hasValue(0);
//=> false

hasValue(0, true); // treat zero as a value
//=> true

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

hasValue({}});
//=> false

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

hasValue([]);
//=> false

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

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

hasValue(true);
hasValue(false);
//=> true

isEmpty

To test for empty values, do:

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

Author

Jon Schlinkert

• github/jonschlinkert
• twitter/jonschlinkert

License

Copyright (c) 2015 Jon Schlinkert
Released under the MIT license

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This file was generated by verb-cli on March 24, 2015.