Replace All 20 With Space In Javascript

Replace All 20 With Space In Javascript

3 min read Jun 20, 2024
Replace All 20 With Space In Javascript

Replace All "20" with Spaces in JavaScript

This article will guide you through how to replace all instances of the string "20" with spaces within a given string in JavaScript.

Using the replace() method with the g flag

The most straightforward approach is using the replace() method with the global flag (g). This flag ensures that all occurrences of the target string are replaced, not just the first one.

Here's the code:

const string = "This string contains 20 numbers, but 20 also appears in words like twenty.";
const replacedString = string.replace(/20/g, ' ');

console.log(replacedString);
// Output: "This string contains  numbers, but  also appears in words like twenty."

Explanation:

  1. string.replace(/20/g, ' '): This line calls the replace() method on the string variable.
    • /20/g: This is a regular expression that represents the string "20". The g flag after the closing slash ensures that all occurrences of "20" will be replaced.
    • ' '`: This is the string that will replace each occurrence of "20".

Using a loop

While the replace() method is generally the preferred choice, you can also achieve the same outcome using a loop. This approach might be helpful if you need more control over the replacement process or if you're working with specific cases.

Here's how it works:

const string = "This string contains 20 numbers, but 20 also appears in words like twenty.";
let replacedString = string;

while (replacedString.includes("20")) {
  replacedString = replacedString.replace("20", ' ');
}

console.log(replacedString);
// Output: "This string contains  numbers, but  also appears in words like twenty."

Explanation:

  1. while (replacedString.includes("20")): This loop continues as long as the replacedString contains the string "20".
  2. replacedString = replacedString.replace("20", ' '): Inside the loop, this line replaces the first occurrence of "20" with a space in the replacedString and updates the replacedString variable with the modified string.

Choosing the best method

For simple replacements, the replace() method with the g flag is the most efficient and concise approach. If you need more customization or have complex replacement scenarios, the loop approach might be more suitable.