transform

v4.17.11

STATUS

Passing

DOWNLOADS

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LICENSE

MIT

VISIBILITY

Public

PUBLISHED

A year ago

SIZE

7 KB

An alternative to `_

Transformer

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import Lodash from 'lodash';

  [2, 3, 4],
  function(result, n) {
    result.push((n *= n));
    return n % 2 == 0;
  },
  [],

modifieddraft

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

_.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(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.