Regular expressions with -match in PowerShell - Mini Project: Build & Apply

Regular Expressions with -match in PowerShell

📖 Scenario: You work in a small company and need to filter a list of email addresses to find only those from a specific domain.

🎯 Goal: Build a PowerShell script that uses the -match operator with a regular expression to find email addresses ending with @example.com.

📋 What You'll Learn

Create a list of email addresses in a variable called emails.

Create a regular expression pattern variable called pattern to match emails ending with @example.com.

Use a foreach loop to check each email with -match and collect matching emails in a list called matchedEmails.

Print the list of matched emails.

💡 Why This Matters

🌍 Real World

Filtering email lists is common in marketing, IT, and customer support to target or exclude specific groups.

💼 Career

Knowing how to use regular expressions with PowerShell helps automate text processing tasks in system administration and data management roles.

1

Create the list of email addresses

Create a variable called emails and assign it an array with these exact email addresses: "[e-mail]", "[e-mail]", "[e-mail]", "[e-mail]".

PowerShell

# Create the emails array
# Your code here

Need a hint?

Use @() to create an array in PowerShell.

2

Create the regular expression pattern

Create a variable called pattern and assign it the string '@example\.com$' to match emails ending with @example.com.

PowerShell

$emails = @("[e-mail]", "[e-mail]", "[e-mail]", "[e-mail]")
# Create the pattern variable
# Your code here

Need a hint?

Use \. to match a literal dot and $ to match the end of the string.

3

Filter emails using -match

Create an empty array called matchedEmails. Use a foreach loop with variable email to go through $emails. Inside the loop, use if ($email -match $pattern) to check if the email matches the pattern. If it matches, add $email to matchedEmails.

PowerShell

$emails = @("[e-mail]", "[e-mail]", "[e-mail]", "[e-mail]")
$pattern = '@example\.com$'
# Create matchedEmails array
# Use foreach loop to filter emails
# Your code here

Need a hint?

Use += to add items to an array in PowerShell.

4

Print the matched emails

Use Write-Output to print the $matchedEmails array.

PowerShell

$emails = @("[e-mail]", "[e-mail]", "[e-mail]", "[e-mail]")
$pattern = '@example\.com$'
$matchedEmails = @()
foreach ($email in $emails) {
    if ($email -match $pattern) {
        $matchedEmails += $email
    }
}
# Print matchedEmails
# Your code here

Need a hint?

Use Write-Output to show the results in PowerShell.