How to remove row in 2d array in javascript

Question

How to remove row in two dimensional array in JavaScript with row number. If I want to delete all elements in row number 4 then how can do it??

Answer 1

I realize this question is old, but it is one of the first results when searching for how to remove from a 2d (multidimensional) array in JS.

Here is what I used to delete the inner array based on a key of the inner array. It should continue to work if there were multiple instances of the same key. In this example, I am searching for, and removing the array with the key of 18.

Sorry about the formatting - it gets the point across.

var items = [
  ["19", 1],
  ["18", 2],
  ["20", 3]
];

//console.log(items);
document.getElementById("a").innerHTML = items;

for (var i = 0; i < items.length; i++) {
  if (items[i][0] == "18") {
    items.splice(i, 1);
  }
}

//console.log(items);
document.getElementById("b").innerHTML = items;

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