FreeCodeCamp Javascript Algorithm | https://www.freecodecamp.com/map | https://www.freecodecamp.com/shahidkh4n

Chunky Monkey.js

function chunkArrayInGroups(arr, size) {
  // Break it up.
  var times = arr.length / size;
  console.log(times);
  var f = 0, e = size;
  var narr = [];
  for(var i=0; i<times; i++){
    narr.push ( arr.slice(f, e) );
    f = e;
    e += size;
  }
  return narr;
}

chunkArrayInGroups(["a", "b", "c", "d"], 2);

Falsy Bouncer.js

function bouncer(arr) {
  // Don't show a false ID to this bouncer.
  var filtered = arr.filter(Boolean);
  console.log(filtered);
  return filtered;
}

bouncer([7, "ate", "", false, 9]);

Mutations.js

function mutation(arr) {
  bPointer = false;
  var narr = arr[1].toLowerCase().split("");
  for(var i=0; i<narr.length; i++){
    var x = narr[i];
    bPointer = (arr[0].toLowerCase().indexOf(x) != -1);
    console.log(x, arr[0], bPointer);
    if(!bPointer) break;
  }
  return bPointer;
}



mutation(["hello", "hey"]);

repeat-string-repeat-a-string.js

function repeatStringNumTimes(str, num) {
  // repeat after me
  String.prototype.repeat = function(n){
    t = '';
    for(var i=0; i<n; i++){
        t += this;
    }
    return t;
  };
  if(num > 0)
    return str.repeat(num);
  else return '';
}

repeatStringNumTimes("abc", 3);

Slasher Flick.js

function slasher(arr, howMany) {
  // it doesn't always pay to be first
  return arr.splice(howMany, arr.length);
}

slasher([1, 2, 3], 2);

Truncate-A-String.js

function truncateString(str, num) {
  // Clear out that junk in your trunk
  if( num < str.length && num > 3){
    return str.slice(0, num-3) + '...';
  }else if(num<3){
    return str.slice(0, num) + '...';
  }
  return str;
}

truncateString("A-", 1);