javascript removing item from array

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));

1var myArray = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
2
3//removing element using splice method -- 
4//arr.splice(index of the item to be removed, number of elements to be removed)
5//Here lets remove Sunday -- index 0 and Monday -- index 1
6  myArray.splice(0,2)
7
8//using filter method
9let itemToBeRemoved = ["Sunday", "Monday"]
10var filteredArray = myArray.filter(item => !itemToBeRemoved.includes(item))

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