Numero.js

A stricter parseInt and parseFloat.

Usage

numero.parseInt(42);      // 42
numero.parseInt('42');    // 42
numero.parseInt('42 ');   // 42
numero.parseInt(3.14);    // null
numero.parseInt('3.14');  // null
numero.parseInt(' 3.14'); // null

numero.parseFloat(42);      // 42
numero.parseFloat('42');    // 42
numero.parseFloat('42 ');   // 42
numero.parseFloat(3.14);    // 3.14
numero.parseFloat('3.14');  // 3.14
numero.parseFloat(' 3.14'); // 3.14

1. null is returned if x cannot be parsed to an integer/float.

2. An integer is also a float.

3. x can have trailing/leading whitespace.

Numero is stricter than the native parseInt and parseFloat in that extraneous characters are not allowed. For example:

parseInt('42foo', 10);    // 42
numero.parseInt('42foo'); // null

parseFloat('3.14foo');        // 3.14
numero.parseFloat('3.14foo'); // null

Numero can also handle numbers in their octal and hexadecimal representations, and negative numbers too:

numero.parseInt('052');     // 42
numero.parseFloat('-0x2a'); // -42

Check the tests.

API

numero.isInt(x)

Returns true if x can be parsed to an integer. Alias: isInteger

numero.parseInt(x)

Returns an integer, or null if x cannot be parsed to an integer. Alias: parseInteger.

numero.isFloat(x)

Returns true if x can be parsed to a float.

numero.parseFloat(x)

Returns a float, or null if x cannot be parsed to a float.

Installation

Install via npm:

$ npm i --save numero

Changelog

• 0.1.0
  • Initial release

License

MIT license