remove element from array javascript

1var colors = ["red","blue","car","green"];
2var carIndex = colors.indexOf("car");//get  "car" index
3//remove car from the colors array
4colors.splice(carIndex, 1); // colors = ["red","blue","green"]

1// Remove single item
2function removeItemOnce(arr, value) {
3   var index = arr.indexOf(value);
4   if (index > -1) {
5      arr.splice(index, 1);
6   }
7   return arr;
8}
9
10// Remove all items
11function removeItemAll(arr, value) {
12   var i = 0;
13   while (i < arr.length) {
14      if (arr[i] === value) {
15         arr.splice(i, 1);
16      } else {
17         ++i;
18      }
19   }
20   return arr;
21}
22
23// Usage
24console.log(removeItemOnce([2, 5, 9, 1, 5, 8, 5], 5));
25console.log(removeItemAll([2, 5, 9, 1, 5, 8, 5], 5));

1//using filter() method => it returns a new array
2data = [1, 2, 3, 4, 5, 6];
3let filteredData = data.filter((i) => {
4    return i > 2
5});
6console.log(filteredData) // [3, 4, 5, 6]

1let fruit = ['apple', 'banana', 'orange', 'lettuce']; 
2// ^^ An example array that needs to have one item removed
3
4fruit.splice(3, 1); // Removes an item in the array using splice() method
5// First argument is the index of removal
6// Second argument is the amount of items to remove from that index and on
7
8

1let numbers = [1,2,3,4]
2
3// to remove last element
4let lastElem = numbers.pop()
5
6// to remove first element
7let firstElem = numbers.shift()
8
9// both these methods modify array while returning the removed element

1let numbers = [1,2,3,4]
2
3// to remove last element
4let last_num = numbers.pop();
5// numbers will now be [1,2,3]
6
7// to remove first element
8let first_num = numbers.shift();
9//numbers will now be [2,3]
10
11// to remove at an index
12let number_index = 1
13let index_num = numbers.splice(number_index,1); //removes 1 element at index 1
14//numbers will now be [2]
15
16//these methods will modify the numbers array and return the removed element