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showing results for - "js get array length"
Cristina
09 Oct 2016
1var person={
2    "first_name":"Harry",
3    "last_name":"Potter",
4    "age":14
5};
6var personSize = Object.keys(person).length; //gets number of properties (3)
source
Eleonora
25 Sep 2018
1
2// Initialize the Array
3var a = [1,2,3]
4
5// Get the size of the array
6
7let size = a.count
8print(size)
9
10		
11
source
Joaquín
16 Feb 2016
1var numbers = [1, 2, 3, 4, 5];
2var length = numbers.length;
3for (var i = 0; i < length; i++) {
4  numbers[i] *= 2;
5}
6// numbers is now [2, 4, 6, 8, 10]
7
Michael
21 Jun 2016
1var arr = [10,20,30,40,50]; //An Array is defined with 5 instances
2
3var len= arr.length;  //Now arr.length returns 5.Basically, len=5.
4console.log(len); //gives 5
5console.log(arr.length); //also gives 5
Federico
19 Jun 2018
1<html>
2   <head>
3      <title>JavaScript Array length Property</title>
4   </head>
5   
6   <body>   
7      <script type = "text/javascript">
8         var arr = new Array( 10, 20, 30 );
9         document.write("arr.length is : " + arr.length); 
10      </script>      
11   </body>
12</html>
Bilal
02 Sep 2018
1numbers.length
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