[Algorithms] Reverse Words in a Sentence

·
algorithms
javascript

Today, we’re tackling the Reverse Words algorithm! This is a fun little challenge where we take a sentence, flip each word individually, and put the sentence back together—no messing with the word order, just reversing each word. Let’s dive in!

The Rules

So, here’s what we’re doing:

  1. Reverse each word separately: For example, if you pass in "Coding JavaScript", we should return "gnidoC tpircSavaJ". The words stay in the same spot; only the letters within each word get flipped.
  2. No .reverse() shortcut: This means we won’t use any built-in array-reversing methods. Instead, we’ll get creative and build it from scratch.

Let’s Code It

Here’s a quick solution for the Reverse Words problem:

function reverseWords(string) {
  const wordsArr = string.split(' ')
  const reversedWordsArr = []
 
  wordsArr.forEach(word => {
    let reversedWord = ''
    for (let i = word.length - 1; i >= 0; i--) {
      reversedWord += word[i]
    }
    reversedWordsArr.push(reversedWord)
  })
 
  return reversedWordsArr.join(' ')
}
 
console.log(reverseWords('Coding JavaScript')) // Output: "gnidoC tpircSavaJ"

How It Works

  1. Splitting the Sentence: First, we split our input string by spaces. This gives us an array of words.
  2. Reversing Each Word: For each word, we create an empty string reversedWord and add characters to it one by one in reverse order.
  3. Building the Result: Finally, we collect all the reversed words and join them back together with spaces to form our final sentence.

Wrapping Up

Every time you work through a challenge like this, you’re building up valuable coding skills. Keep experimenting, and soon enough, these challenges will feel second nature.

Good luck, and happy coding!