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Repeating each character number of times their one based index in a string using JavaScript
Problem
We are required to write a JavaScript function that takes in a string of english lowercase alphabets.
Our function should construct a new string in which each character is repeated the number of times their 1-based index in the string in capital case and different character sets should be separated by dash ‘-’.
Therefore, the string ‘abcd’ should become −
"A-Bb-Ccc-Dddd"
Example
Following is the code −
const str = 'abcd';
const repeatStrings = (str) => {
const res = [];
for(let i = 0; i < str.length; i++){
const el = str[i];
let temp = el.repeat(i + 1);
temp = temp[0].toUpperCase() + temp.substring(1, temp.length);
res.push(temp);
};
return res.join('-');
};
console.log(repeatStrings(str));Output
A-Bb-Ccc-Dddd
Updated on: 20-Apr-2021
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