JavaScript: Test case insensitive (except special Unicode characters) string comparison

Last update on May 30 2022 10:00:55 (UTC/GMT +8 hours)

JavaScript String: Exercise-37 with Solution

Write a JavaScript function to test case insensitive (except special Unicode characters) string comparison.

Test Data:
console.log(compare_strings('abcd', 'AbcD'));
true
console.log(compare_strings('ABCD', 'Abce'));
false

Pictorial Presentation:

JavaScript: Test case insensitive (except special Unicode characters) string comparison

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to test case insensitive (except special Unicode characters) string comparison</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function compare_strings(str1, str2)
{
var areEqual = str1.toUpperCase() === str2.toUpperCase();
  return areEqual;
}

console.log(compare_strings('abcd', 'AbcD'));
console.log(compare_strings('ABCD', 'Abce'));

Sample Output:

true
false

Flowchart:

Live Demo:

See the Pen JavaScript Test case insensitive (except special Unicode characters) string comparison-string-ex-37 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function to create a Zerofilled value with optional +, - sign.
Next: Write a JavaScript function to create a case-insensitive search.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

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