fastaf-array-remove-by-index.js

// taken from https://jsperf.com/array-remove-by-index
// splice: 6,957,292 ops/sec
// swap: 85,501,603 ops/sec (NB. changes order)
// shift: 70,903,814 ops/sec
// btw. don't actually modify the Array prototype. Create a separate function instead.
Array.prototype.mySwapDelete = function arrayMySwapDelete(index) {
  this[index] = this[this.length - 1];
  this.pop();
};

Array.prototype.myShiftDelete = function arrayMyShiftDelete(index) {
  var stop = this.length - 1;
  while (index < stop) {
    this[index] = this[++index];
  }

  this.pop();
};