Return matched array items and remove them from original array

Question

I'm trying to find whether lodash has a function where I can filter based on some query, return an array of the matched objects, but remove the matched objects from the original array.

So very similar to _.filter, but where the original array is modified with the matched elements removed.

Example

var originalArray = [1, 2, 3, 4, 5];
console.log(originalArray);
----> 1, 2, 3, 4, 5

var evenNumbers = _.somethingSimilarToFilter(originalArray, function(n) {
    return n % 2 === 0
});

console.log(evenNumbers);
----> 2, 4

console.log(originalArray);
----> 1, 3, 5

Pranav C Balan · Accepted Answer · 2016-06-14 06:25:44Z

1

You can done it using native JavaScript Array#filter and Array#splice methods

var originalArray = [1, 2, 3, 4, 5];
var evenNumbers = originalArray.filter(function(n, i, arr) {
  // just remove the element from array if  even number
  return n % 2 === 0 && arr.splice(i, 1)
});

console.log(originalArray, evenNumbers);

answered Jun 14, 2016 at 6:25

Pranav C Balan

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