Remove empty array from an array in Javascript

Question

I have an array outer_array. I try to push some array inside the outer_array. But some of the pushed array are empty. I don't want those empty array. I can remove it manually, but i need to delete it from the loop. here is my code:

var ary = [1, 2, 3, 4, 5, 6];
var splitLength = 3;
var outer_lis = [];
var first_limit = 0;
var second_limit = splitLength;
for (var i=0; i<ary.length; i++) {
  outer_lis.push(ary.slice(first_limit, second_limit));
  first_limit += splitLength;
  second_limit += splitLength;
}
console.log(outer_lis);

// Result
[ [ 1, 2, 3 ], [ 4, 5, 6 ], [], [], [], [] ]

I searched for a solution but i got results in php. I dont understand php. If you can give me a solution for this problem its much appreciated. because i am a beginner in Javascript.

http://stackoverflow.com/questions/35310865/remove-sub-array-item-in-javascript (duplicate)? — www139, Dec 31 '16 at 03:49
or simply later do `console.log(outer_lis .filter(String) );`, which skips empty arrays — dandavis, Dec 31 '16 at 03:52

score 2 · Accepted Answer · answered Dec 31 '16 at 03:57

Thanks to dandavis I got the solution. I change the code like this:

...
for (var i=0; i < ary.length / splitLength; i++) {
  outer_lis.push(ary.slice(first_limit, second_limit));
  first_limit += splitLength;
  second_limit += splitLength;
}
...

Now i got the result as i expected.

// Result
[ [ 1, 2, 3 ], [ 4, 5, 6 ] ]

score 1 · Answer 2 · answered Dec 31 '16 at 03:59

1

var arr = [[1,2,3],[],[3,4,5]];
var newArr = arr.filter(function(item){
  return item.length !== 0;
});

answered Dec 31 '16 at 03:59

Harminder

141
1
8

vijay · Answer 3 · 2016-12-31T05:09:23.313

Try this , it will help you to achieve your result without empty array. in this code you can change your splitLength value also.

var ary = [1, 2, 3, 4, 5, 6];
var splitLength = 3;
var outer_lis = [];
var first_limit = 0;
var second_limit = splitLength;
var looplimit = Math.ceil(ary.length / splitLength);
alert(looplimit);
for (var i = 0; i < looplimit; i++) {
  outer_lis.push(ary.slice(first_limit, second_limit));
  first_limit += splitLength;
  second_limit += splitLength;
}
console.log(outer_lis);

score 0 · Answer 4 · answered Dec 31 '16 at 13:41

The solution is simple. Here is the code

var ary = [1, 2, 3, 4, 5, 6, 4],
        splitLength = 3,
        outer_lis = [],
        first_limit = 0,
        second_limit = splitLength,
        length = ary.length,
        totalSubArrays = Math.ceil(length/splitLength);

for (var i = 0; i < totalSubArrays; i++) {
  outer_lis.push(ary.slice(first_limit, second_limit));
  first_limit += splitLength;
  second_limit += splitLength;
}
console.log(outer_lis);

Remove empty array from an array in Javascript

4 Answers4