You want to extract all email addresses from a list of strings stored in $lines. Which PowerShell snippet correctly uses -match and $matches to collect emails into $emails?

hard📝 Application Q15 of 15

PowerShell - String Operations

You want to extract all email addresses from a list of strings stored in $lines. Which PowerShell snippet correctly uses -match and $matches to collect emails into $emails?

A$emails = foreach ($line in $lines) { if ($line -match '[\w.-]+@[\w.-]+\.\w+') { $matches[0] } }

B$emails = $lines -match '[\w.-]+@[\w.-]+\.\w+'

C$emails = $lines | Where-Object { $_ -contains '[\w.-]+@[\w.-]+\.\w+' }

D$emails = foreach ($line in $lines) { $line -match '[\w.-]+@[\w.-]+\.\w+' }

Step-by-Step Solution

Solution:

Step 1: Understand how to loop and match each line
We must check each line with -match and if it matches, collect the matched email from $matches[0].
Step 2: Evaluate each option
$emails = foreach ($line in $lines) { if ($line -match '[\w.-]+@[\w.-]+\.\w+') { $matches[0] } } loops through lines, tests with -match, and collects matched emails correctly. $emails = $lines -match '[\w.-]+@[\w.-]+\.\w+' tries to match the whole array at once, which doesn't work. $emails = $lines | Where-Object { $_ -contains '[\w.-]+@[\w.-]+\.\w+' } uses -contains which does not support regex. $emails = foreach ($line in $lines) { $line -match '[\w.-]+@[\w.-]+\.\w+' } runs -match but does not collect matched emails.
Final Answer:
$emails = foreach ($line in $lines) { if ($line -match '[\w.-]+@[\w.-]+\.\w+') { $matches[0] } } -> Option A
Quick Check:
Loop + -match + $matches[0] collects matches [OK]

Quick Trick: Use foreach + if (-match) + $matches[0] to collect matches [OK]

Common Mistakes:

Trying to match the whole array at once
Using -contains instead of -match for regex
Not collecting $matches[0] inside the loop

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You want to extract all email addresses from a list of strings stored in $lines. Which PowerShell snippet correctly uses -match and $matches to collect emails into $emails?

Step 1: Understand how to loop and match each line

Step 2: Evaluate each option

Final Answer:

Quick Check:

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