Match method and MatchData in Ruby - Mini Project: Build & Apply

Using the Match Method and MatchData in Ruby

📖 Scenario: You are working on a simple text analyzer that looks for specific words in sentences. You want to find if the word "cat" appears in a sentence and get details about where it appears.

🎯 Goal: Build a Ruby program that uses the match method to find the word "cat" in a sentence and then uses the MatchData object to extract information about the match.

📋 What You'll Learn

Create a string variable called sentence with the exact value "The black cat sat on the mat."

Create a regular expression variable called pattern that matches the word "cat"

Use the match method on sentence with pattern and store the result in a variable called match_data

Print the entire matched word from match_data

Print the starting index of the match from match_data

💡 Why This Matters

🌍 Real World

Finding specific words or patterns in text is common in search engines, text editors, and data analysis.

💼 Career

Understanding how to use regular expressions and match data is useful for roles in software development, data processing, and quality assurance.

1

Create the sentence string

Create a string variable called sentence with the exact value "The black cat sat on the mat."

Ruby

# Create the sentence string
# Your code here

Need a hint?

Use double quotes around the sentence exactly as shown.

2

Create the pattern to match the word 'cat'

Create a regular expression variable called pattern that matches the exact word "cat"

Ruby

sentence = "The black cat sat on the mat."
# Create the pattern to match the word 'cat'
# Your code here

Need a hint?

Use slashes / to create the regular expression.

3

Use the match method to find 'cat' in the sentence

Use the match method on sentence with pattern and store the result in a variable called match_data

Ruby

sentence = "The black cat sat on the mat."
pattern = /cat/
# Use match method to find 'cat' and store in match_data
# Your code here

Need a hint?

Call match on sentence with pattern as argument.

4

Print the matched word and its starting index

Print the entire matched word from match_data[0] and then print the starting index of the match from match_data.begin(0)

Ruby

sentence = "The black cat sat on the mat."
pattern = /cat/
match_data = sentence.match(pattern)
# Print the matched word
# Print the starting index of the match
# Your code here

Need a hint?

Use puts to print each value on its own line.