Hello friends, In this article we will learn, how to sort array in javascript.
The sort() method is used to arrange items of an array either in ascending (up) or descending (down) order.
These elements of an array can be alphabetic or numeric. By default, the sort() method sorts the values as strings in alphabetical ascending order.
var color = ["Red","Green","Yellow","Blue","White","Cyan","Megenta","Black"];
color.sort();
document.write(color+"<br />");
OUTPUT: Black,Blue,Cyan,Green,Megenta,Red,White,Yellow
var day = [4,5,7,3,2,1,6]
day.sort();
document.write(day+"<br />");
OUTPUT: 1,2,3,4,5,6,7
Syntax:
array.sort(callbackfunction)
callbackfunction:
optional parameter as an method deligate. A function that defines an alternative logic for sorting order. it return a negative, zero, or positive value, depending on the arguments to itself.
function(a, b){return a-b}
var day = [4,5,7,3,2,1,6]
day.sort(function(a,b){return a-b});
document.write(day+"<br />");
//OR
var day = [4,5,7,3,2,1,6]
var f = function(a,b){
return a-b;
}
day.sort(f);
document.write(day+"<br />");
//OR
var day = [4,5,7,3,2,1,6]
day.sort((a,b)=>{return a-b});
document.write(day+"<br />");
//OR
var day = [4,5,7,3,2,1,6]
var f = (a,b)=>{return a-b};
day.sort(f);
document.write(day+"<br />");
OUTPUT: 1,2,3,4,5,6,7
Descending Order:
var day = [4,5,7,3,2,1,6]
day.sort(function(a,b){return b-a});
document.write(day+"<br />");
//OR
var day = [4,5,7,3,2,1,6]
var f = function(a,b){
return b-a;
}
day.sort(f);
document.write(day+"<br />");
//OR
var day = [4,5,7,3,2,1,6]
day.sort((a,b)=>{return b-a});
document.write(day+"<br />");
//OR
var day = [4,5,7,3,2,1,6]
var f = (a,b)=>{return b-a};
day.sort(f);
document.write(day+"<br />");
OUTPUT: 7,6,5,4,3,2,1
var color = ["Red","Green","Yellow","Blue","White","Cyan","Megenta","Black"];
color.sort();
document.write(color+"<br />");
color.reverse();
document.write(color+"<br />");
OUTPUT: Black,Blue,Cyan,Green,Megenta,Red,White,Yellow Yellow,White,Red,Megenta,Green,Cyan,Blue,Black
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