Sentence Capitalization

Challenge Description

Given a string, capitalize the first letter of each word and make the rest of the letters lowercase. For example:

• "hello world" becomes "Hello World"
• "jordan peterson" becomes "Jordan Peterson"

Tips to Solve

tip

1. Make the string lowercase using the toLowerCase method.
2. Convert the string to an array using the split method.
3. Capitalize the first letter of each word using the map method.
4. Convert the array back to a string using the join method.

Step-by-Step Solution

Let's break down the solution into easy steps:

1. Make the String Lowercase: Use the toLowerCase method to convert the entire string to lowercase.

   const lowerCaseStr = "HELLO WORLD".toLowerCase(); // "hello world"

2. Convert the String to an Array: Use the split method to convert the string into an array of words.

   const wordsArray = lowerCaseStr.split(" "); // ["hello", "world"]

3. Capitalize Each Word: Use the map method to capitalize the first letter of each word.

   const capitalizedWordsArray = wordsArray.map(
     (word) => word[0].toUpperCase() + word.slice(1)
   ); // ["Hello", "World"]

4. Convert the Array Back to a String: Use the join method to combine the words back into a single string.

   const capitalizedStr = capitalizedWordsArray.join(" "); // "Hello World"

Full Solution Code

Here is the complete solution using the steps above:

const capitalize = (str) => {
  return str
    .toLowerCase()
    .split(" ")
    .map((word) => word[0].toUpperCase() + word.slice(1))
    .join(" ");
};

console.log(capitalize("hello world")); // Output: "Hello World"
console.log(capitalize("zeeshan mukhtar")); // Output: "Zeeshan Mukhtar"