@qatools/js-utils/src/utils/arrayUtils.js

JavaScript utilities

const range = (from, to) =>
  Array.from({ length: to - from + 1 }, (_, index) => index + to - from);

const shuffle = array => {
  const arrayToShuffle = [...array];
  return range(0, arrayToShuffle.length - 1).reduce((acc, _i) => {
    const random = Math.floor(Math.random() * arrayToShuffle.length);
    acc.push(...arrayToShuffle.splice(random, 1));
    return acc;
  }, []);
};

function unique(objectsArray, equalsFn = o1 => o2 => o1 == o2) {
  const uniqueArray = [];
  for (let item of objectsArray) {
    const isAlreadySaved = uniqueArray.find(equalsFn(item));
    if (!isAlreadySaved) {
      uniqueArray.push(item);
    }
  }
  return uniqueArray;
}

module.exports = { range, shuffle, unique };