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

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.
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JavaScript: Tips of the Day
var functionName = function() {} vs function functionName() {}
The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).
For example, a function expression:
// TypeError: functionOne is not a function functionOne(); var functionOne = function() { console.log("Hello!"); };
Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.
'use strict'; { // note this block! function functionThree() { console.log("Hello!"); } } functionThree(); // ReferenceError
Ref: https://bit.ly/2zMAj1O
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