How to merge and sort arrays in JavaScript _ basic knowledge

This article describes how to merge and sort arrays in JavaScript. It is the basic knowledge in JavaScript beginners. For more information, see Merge two Arrays-concat ()
Source code:

Click the button to merge the array.
Click meScript function myFunction () {var hege = ["Cecilie", "Lone"]; var stale = ["Emil", "Tobias", "Linus"]; var children = hege. concat (stale); var x = document. getElementById ("demo"); x. innerHTML = children;} script

Test results:

Cecilie,Lone,Emil,Tobias,Linus

Merge three Arrays-concat ()
Source code:

《script》var parents = ["Jani", "Tove"];var brothers = ["Stale", "Kai Jim", "Borge"];var children = ["Cecilie", "Lone"];var family = parents.concat(brothers, children);document.write(family);《script》

Test results:

Jani,Tove,Stale,Kai Jim,Borge,Cecilie,Lone

Array sorting (alphabetically ascending)-sort ()
Source code:

​
Click the button to sort the array.
​Try it​《script》function myFunction(){var fruits = ["Banana", "Orange", "Apple", "Mango"];fruits.sort();var x=document.getElementById("demo");x.innerHTML=fruits;}《script》​ 

Test results:

Apple,Banana,Mango,Orange

Sort numbers (ascending order of numbers)-sort ()
Source code:

​
Click the button to sort the array.
​Try it​《script》function myFunction(){var points = [40,100,1,5,25,10];points.sort(function(a,b){return a-b});var x=document.getElementById("demo");x.innerHTML=points;}《script》​  

Test results:

1,5,10,25,40,100

Sort numbers (in descending order)-sort ()
Source code:

​
Click the button to sort the array.
​Try it​《script》function myFunction(){var points = [40,100,1,5,25,10];points.sort(function(a,b){return b-a});var x=document.getElementById("demo");x.innerHTML=points;}《script》​

Test results:

100,40,25,10,5,1

Sort the elements in an array in reverse order-reverse ()
Source code:

​
Click the button to reverse the order of the elements in the array.
​Try it​《script》var fruits = ["Banana", "Orange", "Apple", "Mango"];​function myFunction(){fruits.reverse();var x=document.getElementById("demo");x.innerHTML=fruits;}《script》​  

Test results:

Mango,Apple,Orange,Banana