Javascript中的Splice Function将4个空行添加到我的数组中吗？

Question

I want to remove all the rows whose length is less than some value. I'am using Splice function in javascript to do this.

for (var i = 0; i < table.length; i++) {

    if (table[i].length<=6) {
         table.splice(i, 1);
    }
}

but two rows with length:0 are being added at the beginning and at the end of my array this is the actual array extra rows added after being spliced whis is this happening? how can i get rid of it?

Answer 1

I suggest to splice from the end to start, because if an element is spliced, the following elements are move a place in front of the array.

 var table = [ [0, 1, 2, 3, 4, 5], [], [0], [], [], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], [0, 1, 2, 3, 4, 5, 6, 7], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [0], [], [], [1] ], i = table.length; while (i--) { if (table[i].length <= 6) { table.splice(i, 1); } } console.log(table); 

Answer 2

Try with this:

for (var i = 0; i < table.length; i++) {

    if (table[i].length<=6) {
        table.splice(i, 1);
        i--;
    }
}

After deleting a row you have to decrease the index to the array because the elements of the array have been shifted by the precious removal.