JavaScript: Parameterize a string

JavaScript String: Exercise-7 with Solution

Parameterize String

Write a JavaScript function to parameterize a string.

Test Data:
console.log(string_parameterize("Robin Singh from USA."));
"robin-singh-from-usa"

Sample Solution:

JavaScript Code:

// Define a function named string_parameterize that takes a string str1 as input
string_parameterize = function (str1) {
    // Trim leading and trailing whitespace, convert to lowercase, and replace non-alphanumeric characters with an empty string
    return str1.trim().toLowerCase().replace(/[^a-zA-Z0-9 -]/, "").replace(/\s/g, "-");
};
// Output the result of calling the string_parameterize function with the input "Robin Singh from USA."
console.log(string_parameterize("Robin Singh from USA."));

Output:

robin-singh-from-usa

Explanation:

In the exercise above,

• Define a function named "string_parameterize()" that takes a string 'str1' as input.
• The function first trims leading and trailing whitespace from the input string.
• It then converts the string to lowercase using the "toLowerCase()" method.
• Next, it uses a regular expression (/[^a-zA-Z0-9 -]/) to remove any characters that are not alphanumeric, spaces, or hyphens from the string, replacing them with an empty string.
• Finally, it replaces any remaining whitespace characters with hyphens using the "replace()" method.

Flowchart:

Live Demo:

See the Pen JavaScript Parameterize a string - string-ex-7 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that converts a string to lowercase and replaces spaces with hyphens to create a URL slug.
• Write a JavaScript function that removes special characters from a string before parameterizing it.
• Write a JavaScript function that accepts a string and a replacement character for spaces, then outputs the parameterized string.
• Write a JavaScript function that trims the string and then parameterizes it while handling multiple consecutive spaces.

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