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Move string capital letters to front maintaining the relative order - JavaScript
We are required to write a JavaScript function that takes in a string with uppercase and lowercase letters. The function should return a string with all the uppercase letters moved to front of the string.
For example: If the input string is −
const str = 'heLLO woRlD';
Then the output should be −
const output = 'LLORDhe wol';
Example
Following is the code −
const str = 'heLLO woRlD';
const moveCapitalToFront = (str = '') => {
let capitalIndex = 0;
const newStrArr = [];
for(let i = 0; i < str.length; i++){
if(str[i] !== str[i].toLowerCase()){
newStrArr.splice(capitalIndex, 0, str[i]);
capitalIndex++;
}else{
newStrArr.push(str[i]);
};
};
return newStrArr.join('');
};
console.log(moveCapitalToFront(str));Output
Following is the output in the console −
LLORDhe wol
Updated on: 16-Sep-2020
182 Views
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