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JavaScript: Sort the strings of a given array of strings in the order of increasing lengths

JavaScript Basic: Exercise-143 with Solution

Write a JavaScript program to sort the strings of a given array of strings in the order of increasing lengths.

Note: Do not change the order if the lengths of two string are same.

Pictorial Presentation:

JavaScript: Sort the strings of a given array of strings in the order of increasing lengths.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Sort the strings of a given array of strings in the order of increasing lengths.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function sort_by_string_length(arra) {
	for (var i = 0; i < arra.length; i++) {
		for (var j = i + 1; j < arra.length; j++) {
			if (arra[i].length > arra[j].length) {
				var m = arra[i];
				arra[i] = arra[j];
				arra[j] = m;
			}
		}
	}
	return arra;
}
var arra = ["xyz","acd","aa","bb","zzz","", "a","b"];
console.log("Original array: "+ arra+"\n");
console.log(sort_by_string_length(["xyz","acd","aa","bb","zzz","", "a","b"]));

Sample Output:

Original array: xyz,acd,aa,bb,zzz,,a,b

["","a","b","bb","aa","xyz","acd","zzz"]

Flowchart:

Flowchart: JavaScript - Sort the strings of a given array of strings in the order of increasing lengths

ES6 Version:

function sort_by_string_length(arra) {
	for (let i = 0; i < arra.length; i++) {
		for (let j = i + 1; j < arra.length; j++) {
			if (arra[i].length > arra[j].length) {
				const m = arra[i];
				arra[i] = arra[j];
				arra[j] = m;
			}
		}
	}
	return arra;
}
var arra = ["xyz","acd","aa","bb","zzz","", "a","b"];
console.log("Original array: ",arra);
console.log(sort_by_string_length(["xyz","acd","aa","bb","zzz","", "a","b"]));

Live Demo:

See the Pen javascript-basic-exercise-143 by w3resource (@w3resource) on CodePen.


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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