findObjectFromArray quickly

findObjectFromArray.js

// @param list: array
// @param matcher: function to check match
// @param reverse: find from last if true
// Example:
// const matchedMessage = findObjectFromArray(state.list, (val) => {
//   return (val.rootId === key);
// }, true);
// const matchedIndex = matchedMessage[0];
// const matchedObject = matchedMessage[1];
export default function (list, matcher, reverse = false) {
  let matchedIndex;
  let matchedObject;
  let target = list;
  if (reverse) {
    // prevent reverse oringinal array
    target = list.slice().reverse();
  }
  const matched = target.some((val, index) => {
    if (matcher(val)) {
      matchedIndex = index;
      matchedObject = val;
      return true;
    }
    return false;
  });
  if (matched) {
    if (reverse) {
      matchedIndex = (target.length - 1) - matchedIndex;
    }
    return [matchedIndex, matchedObject];
  }
  return null;
}