JavaScript: Convert a string into camel case

JavaScript String: Exercise-11 with Solution

Camelize String

Write a JavaScript function to convert a string into camel case.

Test Data:
console.log(camelize("JavaScript Exercises"));
console.log(camelize("JavaScript exercises"));
console.log(camelize("JavaScriptExercises"));
"JavaScriptExercises"
"JavaScriptExercises"
"JavaScriptExercises"

Visual Presentation:

Sample Solution:

JavaScript Code:

// Define a function named camelize, taking a string parameter 'str'
camelize = function camelize(str) {
    // Use the replace method with a regular expression to match non-word characters followed by any character
    // The regular expression /\W+(.)/g matches one or more non-word characters followed by any character, capturing the character
    // For each match, a callback function is invoked with 'match' representing the entire match and 'chr' representing the captured character
    return str.replace(/\W+(.)/g, function(match, chr) {
        // Convert the captured character to uppercase and return it
        return chr.toUpperCase();
    });
}

// Output the result of camelize function for different input strings
console.log(camelize("JavaScript Exercises"));
console.log(camelize("JavaScript exercises"));
console.log(camelize("JavaScriptExercises"));

Output:

JavaScriptExercises
JavaScriptExercises
JavaScriptExercises

Explanation:

In the exercise above,

• The function "camelize()" takes a string 'str' as input.
• Inside the function, the "replace()" method is used on the input string 'str'.
• The regular expression '/\W+(.)/g' is used to match non-word characters followed by any character and captures that character.
• For each match found, a callback function is executed, where 'match' represents the entire matched substring and 'chr' represents the captured character.
• Within the callback function, the captured character 'chr' is converted to uppercase using the "toUpperCase()" method.
• The "replace()" method replaces each matched substring with its corresponding uppercase character.
• Finally, the function returns the modified string in camel case format.

Flowchart:

Live Demo:

See the Pen JavaScript Convert a string into camel case - string-ex-11 by w3resource (@w3resource) on CodePen.

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