freeCodeCamp Challenge Guide: Drop it

Guide
44 
function dropElements(arr, func) {
  // Drop them elements.
  var loop = arr.length;
  for(var i=0; i<=loop;i++){
    if(func(arr[0])!=true){
      arr.shift();
    }
  }
  return arr;
  
}


dropElements([1, 2, 3, 4], function(n) {return n >= 3;});
45

Thats how I did it. I though it looked clean, neat and only ran as long as it needed to get to a solution.

46

Here is my solution:

function dropElements(arr, func) {
	var result = [],
		test = false,
		handler = function(element, index, array) {
			if (func(element)) {
				test = true;
			}
			if (test) {
				result.push(element);
			}
		};
	arr.forEach(handler);
	return result;
}

dropElements([1, 2, 3, 4], function(n) {return n > 5;});
47

Mine in a few lines:

function dropElements(arr, func) {
  while (func(arr[0]) === false) {
    arr.shift();
  }
  
  return arr;
}

dropElements([1, 2, 3, 4], function(n) {return n >= 3;});
1 Like
48

Hello coders,

Here’s a slightly different solution from what I’ve seen here:

    function dropElements(arr, func) {
      // Drop them elements?   
      for (var i = 0; i < arr[arr.length-1]; i++) {
        if(!func(arr[i-i]))
          arr.shift();
      }
      return arr;
    }
    //Yes we can!
    dropElements([1, 2, 3, 9, 2], function(n) {return n > 2;});
2 Likes