JavaScript: Sort the items of an array
JavaScript Array: Exercise-7 with Solution
Write a JavaScript program to sort the items of an array.
Sample array : var arr1 = [ 3, 8, 7, 6, 5, -4, 3, 2, 1 ];
Sample Output : -4,-3,1,2,3,5,6,7,8
Pictorial Presentation:
Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Write a JavaScript program to sort the items of an array</title>
</head>
<body>
</body>
</html>
JavaScript Code:
var arr1=[-3,8,7,6,5,-4,3,2,1];
var arr2=[];
var min=arr1[0];
var pos;
var max=arr1[0];
for (i=0; i<arr1.length; i++)
{
if (max<arr1[i]) max=arr1[i];
}
for (var i=0;i<arr1.length;i++)
{
for (var j=0;j<arr1.length;j++)
{
if (arr1[j]!="x")
{
if (min>arr1[j])
{
min=arr1[j];
pos=j;
}
}
}
arr2[i]=min;
arr1[pos]="x";
min=max;
}
console.log(arr2);
Sample Output:
[-4,-3,1,2,3,5,6,7,8]
Flowchart:
ES6 Version:
const arr1=[-3,8,7,6,5,-4,3,2,1];
const arr2=[];
let min=arr1[0];
let pos;
var max=arr1[0];
for (i=0; i<arr1.length; i++)
{
if (max<arr1[i]) max=arr1[i];
}
for (var i=0;i<arr1.length;i++)
{
for (let j=0;j<arr1.length;j++)
{
if (arr1[j]!="x")
{
if (min>arr1[j])
{
min=arr1[j];
pos=j;
}
}
}
arr2[i]=min;
arr1[pos]="x";
min=max;
}
console.log(arr2);
Live Demo:
See the Pen JavaScript - Sort the items of an array- array-ex- 7 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program which accept a number as input and insert dashes (-) between each two even numbers.
Next: Write a JavaScript program to find the most frequent item of an array.
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JavaScript: Tips of the Day
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
Ref: https://bit.ly/2BXbp04
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