How to use Array Manipulation In Javascript
- In this approach, we push random characters into an array and then use the join() method to convert the array into a string.
- Create a characters array containing all the characters that you allow to be in your string.
- Create an empty array “resultArray” to store characters. And iterate it “n” times.
- Inside the for loop generate a random index using Math.random() and store it in a variable.
- Select the character present at previously generated random index from your character array and push it in the previously created “resultArray”.
- After the loop ends you will have your “n” characters stored in your array “resultArray”. Use join() method to join all the characters in the array as a string.
Example: This example shows the use of the above-explained approach.
function getString(n) {
const characters =
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
const charLen = characters.length;
const resultArray = [];
for (let i = 0; i < n; i++) {
// Generating a random index
const idx = Math.floor(Math.random() * charLen);
// Pushing the corresponding
// character to the array
resultArray.push(characters.charAt(idx));
}
// Joining all the characters of the array
return resultArray.join('');
}
const result = getString(10);
console.log(result);
Output
QwZMolRRqi
JavaScript Program for Generating a String of Specific Length
In this article, we are going to discuss how can we generate a string having a specific length. You might encounter many situations when working with JavaScript where you need to produce a string with a specified length. This could be done for a number of reasons, including generating passwords, unique IDs, or formatting data for display.
Table of Content
- Using For Loop
- Using String.prototype.repeat()
- Using Array Manipulation
- Using Array.from()
- Using Crypto Module