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Regrouping characters of a string in JavaScript
Problem
We are required to write a JavaScript function that takes in a string str as the first and the only argument.
The string str can contain three types of characters −
English alphabets: (A-Z), (a-z)
Numerals: 0-9
Special Characters − All other remaining characters
Our function should iterate through this string and construct an array that consists of exactly three elements, the first contains all alphabets present in the string, second contains the numerals and third the special characters maintain the relative order of characters. We should finally return this array.
For example, if the input to the function is
Input
const str = 'thi!1s is S@me23';
Output
const output = [ 'thisisSme', '123', '! @' ];
Example
Following is the code −
const str = 'thi!1s is S@me23';
const regroupString = (str = '') => {
const res = ['', '', ''];
const alpha = 'abcdefghijklmnopqrstuvwxyz';
const numerals = '0123456789';
for(let i = 0; i < str.length; i++){
const el = str[i];
if(alpha.includes(el) || alpha.includes(el.toLowerCase())){
res[0] += el;
continue;
};
if(numerals.includes(el)){
res[1] += el;
continue;
};
res[2] += el;
};
return res;
};
console.log(regroupString(str));Output
[ 'thisisSme', '123', '! @' ]
Updated on: 24-Apr-2021
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