takeUntil.js

const takeUntil = (array, callback) => {
  const result = [];
  for ( const item of array) {
    if (callback(item)) {
      return result;
    }
    result.push(item);
  }
  return result;
};











const data1 = [1, 2, 5, 7, 2, -1, 2, 4, 5];
const results1 = takeUntil(data1, x => x < 0);
console.log(results1);

console.log('---');

const data2 = ["I've", "been", "to", "Hollywood", ",", "I've", "been", "to", "Redwood"];
const results2 = takeUntil(data2, x => x === ',');
console.log(results2);


[ 1, 2, 5, 7, 2 ]
--
[ 'I\'ve', 'been', 'to', 'Hollywood' ]