JavaScript: Create a case-insensitive search

Last update on May 30 2022 09:58:45 (UTC/GMT +8 hours)

JavaScript String: Exercise-38 with Solution

Write a JavaScript function to create a case-insensitive search.

Test Data:
console.log(case_insensitive_search('JavaScript Exercises', 'exercises'));
"Matched"
console.log(case_insensitive_search('JavaScript Exercises', 'Exercises'));
"Matched"
console.log(case_insensitive_search('JavaScript Exercises', 'Exercisess'));
"Not Matched"

Pictorial Presentation:

JavaScript: Create a case-insensitive search

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to create a case-insensitive search.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function case_insensitive_search(str, search_str)
  {
    var result= str.search(new RegExp(search_str, "i"));
  
    if (result>0)
    return 'Matched';
    else
    return 'Not Matched';  
   }

console.log(case_insensitive_search('JavaScript Exercises', 'exercises'));

console.log(case_insensitive_search('JavaScript Exercises', 'Exercises'));

console.log(case_insensitive_search('JavaScript Exercises', 'Exercisess'));

Sample Output:

Matched
Matched
Not Matched

Flowchart:

Live Demo:

See the Pen JavaScript Create a case-insensitive search-string-ex-38 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript function to uncapitalize the first character of a string.

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