memoize

_.memoize(func) # Ⓢ [Ⓣ][1] Ⓝ

Creates a function that memoizes the result of func. If resolver is

provided, it determines the cache key for storing the result based on the

arguments provided to the memoized function. By default, the first argument

provided to the memoized function is used as the map cache key. The func

is invoked with the this binding of the memoized function.

Note: The cache is exposed as the cache property on the memoized

function. Its creation may be customized by replacing the _.memoize.Cache

constructor with one whose instances implement the

Map

method interface of clear, delete, get, has, and set.

Since

0.1.0

Arguments

1. func (Function): The function to have its output memoized.

Returns

(Function): Returns the new memoized function.

Example

var object = { 'a': 1, 'b': 2 };
var other = { 'c': 3, 'd': 4 };

var values = _.memoize(_.values);
values(object);
// => [1, 2]

values(other);
// => [3, 4]

object.a = 2;
values(object);
// => [1, 2]

// Modify the result cache.
values.cache.set(object, ['a', 'b']);
values(object);
// => ['a', 'b']

// Replace `_.memoize.Cache`.
_.memoize.Cache = WeakMap;

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