How do I solve this javascript titlecase problem?

November 11, 2021

I’m new to javascript and am having a bit of trouble with this problem:
Construct the a function called titleCase that takes a sentence string and gives it title casing.

titleCase("this is an example") //should return "This Is An Example"

titleCase("test") //should return "Test"

titleCase("i r cool") //should return "I R Cool"

titleCase("WHAT HAPPENS HERE") //should return "What Happens Here"

titleCase("") //should return ""

titleCase("A") //should return "A"

This is the code I’ve tried:

const titleCase = function(text) {
  text = text.split(' ');

  for (let i = 0; i < text.length; i++) {
    text[i] = text[i].toLowerCase().split('');
    text[i][0] = text[i][0].toUpperCase();
    text[i] = text[i].join('');
  }
  
  if (text === "") {
       return ""
     } 

  return text.join(' ');
}

It is passing all tests except for the empty string "" test.

>Solution :

You will need to move:

 if (text === "") {
   return ""
 }

to the first line of the function.

Here is a straightforward solution:

function titleCase(s){
   let r="";
   for (let i=0; i<s.length; i++) r+=(i==0 || s[i-1]==" ")?s[i].toUpperCase():s[i].toLowerCase();
   return r;
}
console.log(titleCase("helLo tHERE!"));
console.log(titleCase("this is an example")); //should return "This Is An Example"
console.log(titleCase("test")); //should return "Test"
console.log(titleCase("i r cool")); //should return "I R Cool"
console.log(titleCase("WHAT HAPPENS HERE")); //should return "What Happens Here"
console.log(titleCase("")); //should return ""
console.log(titleCase("A")); //should return "A"