transform

v4.17.15

v4.17.11

STATUS

Passing

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LICENSE

MIT

VISIBILITY

Public

PUBLISHED

4 years ago

SIZE

N/A

An alternative to `_

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transform (

object:Object,

iteratee:Function,

accumulator:*?

) : *

An alternative to reduce this method transforms object to a new accumulator object which is the result of running each of its own enumerable string keyed properties thru iteratee, with each invocation potentially mutating the accumulator object. If accumulator is not provided, a new object with the same [[Prototype]] will be used. The iteratee is invoked with four arguments: (accumulator, value, key, object). Iteratee functions may exit iteration early by explicitly returning false.

Example

transform([2, 3, 4], (result, n) => {
  result.push(n *= n)
  return n % 2 == 0
}, [])
// => [4, 9]

transform({ 'a': 1, 'b': 2, 'c': 1 }, (result, value, key) => {
  (result[value] || (result[value] = [])).push(key)
}, {})
// => { '1': ['a', 'c'], '2': ['b'] }

Arguments

object: Object

The object to iterate over.

iteratee: Function

The function invoked per iteration.

accumulator: *?

The custom accumulator value.

Returns

*

Returns the accumulated value.