_.mapObj()

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Creates a new object with the same properties but different values using the given callback function.

Util module only.

Syntax Variants

_.mapObj(obj, callback)

_.mapObj(obj, callback, ctx)

Parameters

obj

the object to use

callback

The callback function(key, value) to invoke for each property.

key: The name of the current property.
value: The value of the current property.
this: The given context. If not set, the object itself.
(callback return value): This value will replace the original value in the new object.

ctx (optional)

a context to pass to the callback as 'this'.

(return value)

the new object

Description

Creates a new object with the same properties but different values using the given callback function. The function is called for each property of the input object to provice a new value for the property.

Example

Increases the values of all properties.

var r = _.mapObj({a: 1, b: 5, c: 2}, function(key, value) {
    return value + 1;
});
// r is now {a: 2, b: 6, c: 2}

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