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  • License MIT

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Package Exports

  • has-value

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (has-value) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

has-value NPM version Build Status

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Works for:

  • booleans
  • functions
  • numbers (pass true as the last arg to treat zero as a value instead of falsey)
  • strings
  • nulls
  • object
  • arrays

Install

Install with npm

$ npm i has-value --save
  • get-object: Get a property from an object using dot (object path) notation. | homepage
  • get-property: Get a nested property or its value from an object using simple a.b.c paths. | homepage
  • get-value: Use property paths ( a.b.c) to get a nested value from an object. | homepage
  • set-value: Create nested values and any intermediaries using dot notation ('a.b.c') paths. | homepage

Usage

Works with nested object paths or a single value:

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

hasValue({a: {b: {c: 'foo'}}} 'a.b.c');
//=> true

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

hasValue('');
//=> false

hasValue(1);
//=> true

hasValue(0);
//=> false

hasValue(0, true); // pass `true` as the last arg to 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 do the opposite and test for empty values, do:

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

Contributing

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

Running tests

Install dev dependencies:

$ npm i -d && npm test

Author

Jon Schlinkert

License

Copyright © 2014-2015 Jon Schlinkert Released under the MIT license.

This file was generated by verb-cli on November 23, 2015.