Deleting undefined indexes in array Javascript

Question

I can't delete all the undefined indexes in this array.I do console.log and it shows me [undefined, 2].

var array = [];
array[1] = 2;
array[3] = 4;

for(var i = 0; i < array.length; i ++) {
  if(array[i]) {

  } else {
    array.splice(array.indexOf(array[i]), 1);
  }
}

console.log(array)

score 0 · Answer 1 · answered Apr 10 '17 at 00:42

0

var array = [];
array[1] = 2;
array[3] = 4;

for(var i = 0; i < array.length; i ++) {
  if(array[i]) {

  } else {
    array.splice(i, 1);
  }
}

console.log(array)

answered Apr 10 '17 at 00:42

Jose Marques

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1

This doesn't fix anything. There should also be an explanation of what causes the OP's issue and how it fixes it (which should highlight why this doesn't work in a general case); – RobG Apr 10 '17 at 01:11

Deleting undefined indexes in array Javascript

1 Answers1