Convert String to Title Case

JavaScript

Technical Specification

Convert a sentence so that the first letter of each word is uppercase and the rest are lowercase.

Input/Output Samples

Input:"hello world from codewithhappy"

Output:"Hello World From Codewithhappy"

Optimal Logic Path

function toTitleCase(str) {
  return str
    .split(" ")
    .map((word) =>
      word ? word[0].toUpperCase() + word.slice(1).toLowerCase() : ""
    )
    .join(" ");
}

Architectural Deep-Dive

We work word-by-word, making the first character uppercase and the rest lowercase.