Getting first two strings between slashes - regex

Question

I have a string, alpha/beta/charlie/delta
I'm trying to extract out the string alpha/beta including the forward slash.
I'm able to accomplish this with split and joining the first and second result, but I feel like a regex might be better suited.
Depending on how many slashes there are as well will determine how many strings I need to grab, e.g. if there's 4 slashes get the first two strings, if there's 5, then grab first three. Again, my problem is extracting the slash with the string.

Answer 1

As Mathias already noticed - Split+Join is a perfectly valid solution:
$StringArray = #(
'alpha/beta/charlie/delta',
'alpha/beta/charlie/delta/omega'
'alpha/beta/charlie/gamma/delta/omega'
)
foreach ($String in $StringArray) {
$StringSplit = $String -split '/'
($StringSplit | Select-Object -First ($StringSplit.Count - 2) ) -join '/'
}

Answer 2

A little long, but I did it without regex:
$string = 'alpha/beta/charlie/delta/gamma'
# Count number of '/'
$count = 0
for( $i = 0; $i -lt $string.Length; $i++ ) {
if( $string[ $i ] -eq '/' ) {
$count = $count + 1
}
}
# Depending on the number of '/' you can create a mathematical equation, or simply do an if-else ladder.
# In this case, if count of '/' = 3, get first 2 strings, if count = 4, get first 3 strings.
function parse-strings {
Param (
$number_of_slashes,
$string
)
$all_slash = $number_of_slashes
$to_get = $number_of_slashes - 1
$counter = 0
for( $j = 0; $j -lt $string.Length; $j++ ) {
if( $string[ $j ] -eq '/' ) {
$counter = $counter + 1
}
if( $counter -eq $to_get ) {
( $string[ 0 .. ( $j - 1 ) ] -join "" )
break
}
}
}
parse-strings -number_of_slashes $count -string $string

Answer 3

You can try the .split() .net method where you define in parentheses where to split (on which character).
Then use the join operator “-join” to join your elements from the array
For your matter of concern use it like this:
$string = 'alpha/beta/charlie/delta/gamma'
$string = $string.split('/')
$string = "$($string[0])" + "/" + "$($string[1])"
$string
And so on...