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30-seconds-of-code/snippets/pull.md
2017-12-16 23:02:33 -05:00

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Pull

Use Array.filter() to pull out the values that are not needed. Use Array.length = 0 to mutate the passed in array by resetting it's length to zero. Use Array.push() to re-populate the original array to equal the pulled values

const pull = (arr, ...args) => {
  let pulled = arr.filter((v, i) => args.indexOf(v) === -1);
  arr.length = 0;
  pulled.forEach(v => arr.push(v));
}

// let myArray = ['a', 'b', 'c', 'a', 'b', 'c'];
// pull(myArray, 'a', 'c');
// console.log(myArray) -> [ 'b', 'b' ]

// let test = ['4', '1', '1', '5', '4', '2'];
// pull(test, '4', '1');
// console.log(myArray) -> [ '5', '2' ]