Question

How to slice (copy) out a piece of an array into a new array in JavaScript

Answer 1

var arr1 = ["c", "c++", "c#", "Java", "JavaScript", "PHP", "VB.NET"];
 
var arr2 = arr1.slice(1); 
 
document.write(arr1.toString());
document.write("<br />");
document.write(arr2.toString());
                  
/*
run:

c,c++,c#,Java,JavaScript,PHP,VB.NET  // arr1
c++,c#,Java,JavaScript,PHP,VB.NET    // arr2
 
*/

 

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Answer 2

var arr1 = ["c", "c++", "c#", "Java", "JavaScript", "PHP", "VB.NET"];
 
var arr2 = arr1.slice(3); 
 
document.write(arr1.toString());
document.write("<br />");
document.write(arr2.toString());
                  
/*
run:

c,c++,c#,Java,JavaScript,PHP,VB.NET  // arr1
Java,JavaScript,PHP,VB.NET           // arr2
 
*/

 

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Answer 3

var arr1 = ["c", "c++", "c#", "Java", "JavaScript", "PHP", "VB.NET"];
 
//array.slice(start-index, end-index)
 
var arr2 = arr1.slice(3, 5); 
 
document.write(arr1.toString());
document.write("<br />");
document.write(arr2.toString());
                  
/*
run:

c,c++,c#,Java,JavaScript,PHP,VB.NET  // arr1
Java,JavaScript                      // arr2
 
*/

 

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Answer 4

var arr1 = ["c", "c++", "c#", "Java", "JavaScript", "PHP", "VB.NET"];
 
//array.slice(start-index, end-index)
 
var arr2 = arr1.slice(-4, -2); 
 
document.write(arr1.toString());
document.write("<br />");
document.write(arr2.toString());
                  
/*
run:

c,c++,c#,Java,JavaScript,PHP,VB.NET  // arr1
Java,JavaScript                      // arr2
 
*/

 

70+ SQL courses for beginners and professionals