JAVASCRIPT

javascript empty array

arr = [];   // set array=[]

//function
const empty = arr => arr.length = 0;
//example
var arr= [1,2,3,4,5];
empty(arr) // arr=[]

javascript is array empty

var colors=[];
if(!colors.length){
	// I am empty
}else{
	// I am not empty
}

javascript empty array

var colors = ["red","blue","green"];
    colors = []; //empty the array

empty array js

arr = [];

array empty

// n is the legth of the array
int[] IntArray = new int[n] // int array
  
String[] StrArray = new String[n] // String array

array==null array.length java script

if (typeof array != "undefined" && array != null && array.length != null && array.length > 0) {
    // array exists and is not empty
}

javascript empty array

A = [];

empty array js

let list = [1, 2, 3, 4];
function empty() {
    //empty your array
    list.length = 0;
}
empty();

empty array js

// define Array
let list = [1, 2, 3, 4];
function empty() {
    //empty your array
    list = [];
}
empty();

empty array javascript

let myArray = [12 , 222 , 1000 ];  
myArray.length = 0; // myArray will be equal to [].

Empty an Array in JavaScript

// 1) Assigning it to a new empty array
// This is the fastest way to empty an array:
a = [];


// This code assigned the array a to a new empty array. It works perfectly if you do not have any references to the original array.
// See the following example:
let b = a;
a = [];
console.log(b); // [1,2,3]

// Code language: JavaScript (javascript)
// In this example, first, the b variable references the array a. Then, the a is assigned to an empty array. The original array still remains unchanged.

// 2) Setting its length to zero
// The second way to empty an array is to set its length to zero:
a.length = 0;

// The length property is read/write property of an Array object. When the length property is set to zero, all elements of the array are automatically deleted.

// 3) Using splice() method
// The third way to empty an array is to remove all of its elements using the splice() method as shown in the following example:
a.splice(0,a.length);

// Code language: CSS (css)
// In this solution, the splice() method removed all the elements of the a array and returned the removed elements as an array.

// 4) Using pop() method
// The fourth way to empty an array is to remove each element of the array one by one using the while loop and pop() method:

while(a.length > 0) {
    a.pop();
}

javascript empty array

var arr1 = ['a','b','c','d','e','f'];
var arr2 = arr1;  // Reference arr1 by another variable 
arr1 = [];
console.log(arr2); // Output ['a','b','c','d','e','f']

Empty an Array in JavaScript

// 1) Assigning it to a new empty array
// This is the fastest way to empty an array:

a = [];
// This code assigned the array a to a new empty array. It works perfectly if you do not have any references to the original array.

// See the following example:

let b = a;
a = [];

console.log(b); // [1,2,3]
// Code language: JavaScript (javascript)
// In this example, first, the b variable references the array a. Then, the a is assigned to an empty array. The original array still remains unchanged.

2) Setting its length to zero
// The second way to empty an array is to set its length to zero:

a.length = 0;
// The length property is read/write property of an Array object. When the length property is set to zero, all elements of the array are automatically deleted.

// 3) Using splice() method
// The third way to empty an array is to remove all of its elements using the splice() method as shown in the following example:

a.splice(0,a.length);

// Code language: CSS (css)
// In this solution, the splice() method removed all the elements of the a array and returned the removed elements as an array.

// 4) Using pop() method
// The fourth way to empty an array is to remove each element of the array one by one using the while loop and pop() method:

while(a.length > 0) {
    a.pop();
}

empty array javascript

// set array
arr = [1,2,4];

// empty array
arr = [];

empty array length javascript

empty array check javascript