get

Create functions for use with functional methods like map, reduce, filter, etc. that get object properties without need of anonymous wrappers.

Installation

Browser

$ component install timoxley/get

See Components

Node

$ npm install timoxley-get

Sorry for namespaced package, all good names taken.

Examples

Before:

Horrible anonymous wrapper is required to map the length property.

['apple', 'banana', 'pineapple'].map(function(str) {
 return str.length
})
// => [5, 6, 9]

After

Wow. Much cleaner.

['apple', 'banana', 'pineapple'].map(get('length'))
// => [5, 6, 9]

Use get to evaluate methods

// Calls the 'italics' method on each supplied item
['apple', 'banana', 'pineapple'].map(get('italics'))
// => ['<i>apple</i>', '<i>banana</i>', '<i>pineapple</i>']

Use get to evaluate methods, passing in arguments

// Calls the 'substr' method, passing in arguments
['apple', 'banana', 'pineapple'].map(get('substr', 0, 1))
// => ['a', 'b', 'p']

Convoluted Description:

Takes a property name, prop along with any number of additional arguments, and returns a function, that takes an object of any type, and returns the value of prop on that object. If prop is a method, the returned value with be the result of evaluating that method, passing in the the additional arguments.

Turns out this is hard to describe.

License

MIT