plusone

plusone is a simple function that will return the increment of a value. What makes it special? It will increment undefined to be 1 (null already increments to 1 just fine).

Why would you need that? Because of this:

var obj = {
    bar: 'foo'
};

// this results in undefined + 1 === NaN
obj.foo = obj.foo + 1;

// this doesn't work right if obj.bar is a truthy string
obj.bar = obj.bar ? obj.bar + 1 : 1;

// this works as expected, but is long and not that readable
obj.baz = typeof obj.baz !== 'undefined' ? obj.baz + 1 : 1;

// this works as we expect, and reads pretty nicely, see? :)
obj.count = plusone( obj.count );

Installation

npm install plusone --save

Usage

var plusone = require( 'plusone' );

var i = 0;
i = plusone( i );

var obj = {};
obj.count = plusone( obj.count );

Contributing

Pull requests are very welcome! Just make sure your code:

1. Passes jshint given the included .jshintrc

2. Is beautified using jsbeautifier and the included .jsbeautifyrc

3. Has tests and passes them.

CHANGELOG

0.0.3

• REAME example fixed

0.0.2

• Documentation updates
• A couple of more tests

0.0.1

• Initial release.