some codility identical indices test

gistfile1.js

  var A = [];
  A[0] = 3;
  A[1] = 5;
  A[2] = 6;
  A[3] = 3;
  A[4] = 3;
  A[5] = 5;

  function identicalIndices(someArray) {
    var count = 0;
    someArray.forEach(function (item, index) {
      var restOfArray = someArray.slice(index + 1, someArray.length);
      restOfArray.forEach(function (pairCandidate) {
        if (pairCandidate === item) {
          count++;
        }
      });

    });

    return count;
  }

  var b = identicalIndices(A);
  console.log(b);

}

// Another way to do this is to create a helper object
// which stores the indices like this
// var helper = {};
// var count = 0
// A.forEach(function (item, index) {
//   if (helper[item]) {
//     helper[item].push(index);
//   } else {
//     helper[item] = [index];
//   }
// });

// for (var key in helper) {
//   if (helper.hasOwnProperty((key…


      // if (helperObject[item]) {
      //   helperObject[item]++;
      //   if (helperObject[item] % 2 === 0) {
      //     count++;
      //   }
      // } else {
      //   helperObject[item] = 1;
      // }