Named captures in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to capture the year from the date string using named captures.

PowerShell

$date = '2024-06-15'
if ($date -match '(?<year>\d{4})-\d{2}-\d{2}') {
    Write-Output $matches.[1]
}

Drag options to blanks, or click blank then click option'

Ayear

Bmonth

Cday

Ddate

Attempts:

3 left

💡 Hint

Common Mistakes

Using $matches.month or $matches.day which are not defined in the regex.

Trying to access $matches['year'] instead of $matches.year.

The named capture group 'year' captures the four-digit year. Access it with $matches.year.

2fill in blank

medium

Complete the code to extract the 'name' from the string using named captures.

PowerShell

$text = 'Name: John Doe'
if ($text -match 'Name: (?<[1]>\w+ \w+)') {
    Write-Output $matches.name
}

Drag options to blanks, or click blank then click option'

Ausername

Bfullname

Cname

Dperson

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different group name than 'name' causing $matches.name to be empty.

Forgetting to name the capture group.

The named capture group is called 'name' to capture the full name.

3fill in blank

hard

Fix the error in the regex to correctly capture 'hour' as a named group.

PowerShell

$time = '13:45'
if ($time -match '(?<[1]>\d{2}):\d{2}') {
    Write-Output $matches.hour
}

Drag options to blanks, or click blank then click option'

Ahr

Bhour

Chours

Dh

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different group name like 'hours' or 'hr' causing $matches.hour to be null.

Missing the named capture syntax.

The named capture group must be exactly 'hour' to match $matches.hour.

4fill in blank

hard

Fill both blanks to capture 'day' and 'month' from the date string.

PowerShell

$date = '15/06/2024'
if ($date -match '(?<[1]>\d{2})/(?<[2]>\d{2})/\d{4}') {
    Write-Output "Day: $($matches.day), Month: $($matches.month)"
}

Drag options to blanks, or click blank then click option'

Aday

Byear

Cmonth

Ddate

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping day and month group names.

Using incorrect group names that don't match $matches properties.

The first group captures 'day' and the second captures 'month' to match $matches.day and $matches.month.

5fill in blank

hard

Fill all three blanks to capture 'first', 'middle', and 'last' names from the string.

PowerShell

$fullName = 'John Michael Doe'
if ($fullName -match '(?<[1]>\w+) (?<[2]>\w+) (?<[3]>\w+)') {
    Write-Output "First: $($matches.first), Middle: $($matches.middle), Last: $($matches.last)"
}

Drag options to blanks, or click blank then click option'

Afirst

Bmiddle

Clast

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using generic group names like 'name' instead of specific ones.

Not matching group names to the variables used in Write-Output.

The named groups must be 'first', 'middle', and 'last' to match the output variables.