Interview question of the week from Cassidoo's newsletter (implement array.filter() by hand)

arrayFilter.js

function arrayFilter( arrayToFilter, comparison ) {
  const filteredArray = [];
  arrayToFilter.map( item => {
    if ( comparison( item ) === true ) {
      filteredArray.push( item );
    }
  } );
  return filteredArray;
}

const a1 = [ 'apples', 'oranges', 'bananas' ];
const a2 = arrayFilter( a1, item => item !== 'oranges' );

console.log( a1 );
console.log( a2 );