Transpose a Matrix(UPI)

TIP102 Unit 1 Session 2 Advanced (Click for link to problem statements)

Problem Highlights

• 💡 Difficulty: Easy
• ⏰ Time to complete: 10 mins
• 🛠️ Topics: Matrix, 2D Array Manipulation

U-nderstand

Understand what the interviewer is asking for by using test cases and questions about the problem.

• Q: What is the input to the function?

  • A: The input is a string sentence containing words separated by spaces.

• Q: What is the expected output of the function?

  • A: The function should return a string where the order of the words in the input sentence is reversed.

• Q: How should the function handle a sentence with only one word?

  • A: If the sentence contains only one word, the function should return the original string.

• Q: What if the sentence is empty?

  • A: If the sentence is empty, the function should return an empty string.

P-lan

Plan the solution with appropriate visualizations and pseudocode.

General Idea: Split the sentence into words, reverse the order of the words, and then join them back together into a single string.

1) Use the `split()` method to divide the sentence into a list of words.
2) Reverse the order of the words using list slicing.
3) Join the reversed list of words back into a string using the `join()` method, separating the words by spaces.
4) Return the resulting reversed sentence.

⚠️ Common Mistakes

• Forgetting to handle cases where the sentence is empty.
• Not correctly reversing the list of words.
• Returning the list of words instead of a string after reversing.

I-mplement

def reverse_sentence(sentence):
    # Split the sentence into words
    words = sentence.split()
    # Reverse the list of words
    reversed_words = words[::-1]
    # Join the reversed list back into a sentence
    reversed_sentence = ' '.join(reversed_words)
    return reversed_sentence