has-values

What is has-values?

The has-values npm package is a utility that checks if a value exists and is not empty. It can be used to validate objects, arrays, strings, and other data types to ensure they contain meaningful data.

What are has-values's main functionalities?

Check if a string has a value

This feature allows you to check if a string is non-empty. It returns true if the string has a value and false if it is empty.

const hasValues = require('has-values');
console.log(hasValues('hello')); // true
console.log(hasValues('')); // false

Check if an array has values

This feature checks if an array contains any elements. It returns true if the array has elements and false if it is empty.

const hasValues = require('has-values');
console.log(hasValues([1, 2, 3])); // true
console.log(hasValues([])); // false

Check if an object has values

This feature checks if an object has any properties. It returns true if the object has properties and false if it is empty.

const hasValues = require('has-values');
console.log(hasValues({a: 1, b: 2})); // true
console.log(hasValues({})); // false

Check if a nested object has values

This feature checks if a nested object contains any values. It returns true if the nested object has values and false if it is empty.

const hasValues = require('has-values');
console.log(hasValues({a: {b: 2}})); // true
console.log(hasValues({a: {}})); // false

Other packages similar to has-values

lodash

Lodash is a popular utility library that provides a wide range of functions for manipulating and validating data. It includes methods like _.isEmpty, which can be used to check if a value is empty, similar to has-values.

underscore

Underscore is another utility library that offers a variety of functions for working with arrays, objects, and other data types. It includes the _.isEmpty method, which serves a similar purpose to has-values by checking if a value is empty.

validator

Validator is a library focused on string validation and sanitization. It includes functions like isEmpty, which can be used to check if a string is empty, similar to the functionality provided by has-values.

README

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 has-values --save

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);
}

Related projects

You might also be interested in these projects:

• has-value: Returns true if a value exists, false if empty. Works with deeply nested values using… more | 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

Contributing

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

Building docs

Generate readme and API documentation with verb:

$ npm install verb && npm run docs

Or, if verb is installed globally:

$ verb

Running tests

Install dev dependencies:

$ npm install -d && npm test

Author

Jon Schlinkert

• github/jonschlinkert
• twitter/jonschlinkert

License

Copyright © 2016, Jon Schlinkert. Released under the MIT license.

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This file was generated by verb, v, on March 27, 2016.