One upside of using the delete operator is that it is simple and straightforward.

The delete operator does not actually remove the element from the array it simply sets the element to undefined.Īs a result, the length of the array does not change, and the undefined element will still be present if the array is iterated over. Let orangeIndex = fruits.indexOf('Orange') īecause indexOf() does not take any arguments other than the element to search for - you must use it in combination with another method, such as splice(), to actually remove the element from the array. find the index of the 'Orange' element It returns the index of the first occurrence of the specified element, or -1 if the element is not found. This method takes one argument: the element to search for. This means that you can use it to create a new array without affecting the original array. It is also possible to use filter() in combination with other array methods, such as map() or reduce(), to perform complex operations on arrays.Īnd unlike splice() - the filter() method does not modify the original array. This is useful when you want to remove elements that do not meet certain conditions, such as removing non-numeric elements from an array of numbers. One advantage of using filter() is that it allows you to create a new array based on specific criteria. The original numbers array is not modified, and the resulting onlyNumbers array contains only the elements that meet the specified criteria. In this example, we use filter() to create a new array called onlyNumbers, which contains only elements that are numbers (i.e. Let onlyNumbers = numbers.filter(num => typeof num = 'number') Ĭonsole.log(onlyNumbers) // The filter() method takes a callback function that should return true for elements that should be included in the new array, and false for elements that should be removed.įor example: let numbers = The original fruits array is modified, but the original elements are preserved in the new pFruits array.

In this example, we use splice() to create a new array called pFruits, which contains only the element at index 3 (Pineapple). create a new array with only the fruits that start with 'P' If you want to keep the original array intact, you should create a new array with the desired elements using splice(), as shown in the example below: let fruits = This can be useful when you want to remove elements from an array and then perform additional operations on the resulting array. This means you can use it to remove elements from an array without creating a new one. Keep in mind that splice() modifies the original array. As a result, the second and third elements (Banana and Orange) are removed from the array. In this example, we begin removing elements at index 1, and remove a total of 2 elements. remove the second and third elements (Banana and Orange)Ĭonsole.log(fruits) // Js // Using slice, create newCar from m圜ar.The splice() method takes two arguments: the index at which to begin removing elements, and the number of elements to remove.įor example: let fruits = Object.prototype._lookupGetter_() Deprecated.Object.prototype._defineSetter_() Deprecated.Object.prototype._defineGetter_() Deprecated.

Javascript array splice arguments