Regex literal syntax (/pattern/) in Ruby - Mini Project: Build & Apply

Using Regex Literal Syntax in Ruby

📖 Scenario: Imagine you are building a simple program to check if certain words appear in a sentence. You will use Ruby's regex literal syntax to create patterns that help find these words.

🎯 Goal: Learn how to write regex patterns using Ruby's /pattern/ syntax and use them to check if words exist in a sentence.

📋 What You'll Learn

Create a string variable with a sentence

Create a regex pattern using literal syntax to find a specific word

Use the regex pattern to check if the word exists in the sentence

Print the result of the check

💡 Why This Matters

🌍 Real World

Regex patterns help find words or patterns in text, useful in search tools, text editors, and data validation.

💼 Career

Knowing regex literal syntax is important for developers working with text processing, data cleaning, and automation scripts.

1

Create a sentence string

Create a string variable called sentence and set it to the exact text: "The quick brown fox jumps over the lazy dog".

Ruby

# Create the sentence string
# Your code here

Need a hint?

Use double quotes to create the string exactly as shown.

2

Create a regex pattern to find the word 'fox'

Create a regex pattern called pattern using Ruby's regex literal syntax to match the word fox. Use the exact syntax: /fox/.

Ruby

sentence = "The quick brown fox jumps over the lazy dog"
# Create the regex pattern to find 'fox'
# Your code here

Need a hint?

Use slashes / around the word to create the regex pattern.

3

Check if the word 'fox' is in the sentence

Use the regex pattern pattern with the =~ operator to check if sentence contains the word fox. Store the result in a variable called result.

Ruby

sentence = "The quick brown fox jumps over the lazy dog"
pattern = /fox/
# Check if 'fox' is in the sentence and store in result
# Your code here

Need a hint?

The =~ operator returns the index of the match or nil if not found.

4

Print the result of the regex match

Print the value of the variable result using puts to show the position where fox is found in the sentence.

Ruby

sentence = "The quick brown fox jumps over the lazy dog"
pattern = /fox/
result = sentence =~ pattern
# Print the result
# Your code here

Need a hint?

Use puts result to print the index where 'fox' starts.