findall.js

/**
 * Searches through an array finding all
 * occurences of predicates
 * @param arr {array}
 * @param searchVals {array}
 * @return findCountData {object} 
 */
function findAll (arr: any[], searchVals: any[]) {
  let findCounts = searchVals.reduce((acc, val) => {
    acc[val] = 0;
    return acc;
  }, {});
  let findCount = 0;
  let i = 0, j = 0;
  const lenArr = arr.length;
  const lenVals = searchVals.length;
  for (i; i < lenArr; i += 1) {
    for (j; j < lenVals; j += 1) {
      if (arr[i] == searchVals[j]) {
        findCounts[searchVals[j]] += 1;
        findCount += 1;
      }
    }
  }
  return {
    findCount,
    findCounts
  };
}