I want to check if the content of variable A is present in the content variable B with powershell:
variable A = PROD
variable B = xxxxxPRODxxxx
you can use -match to compare using regex
$keyword = 'PROD'
$string = 'xxxxxPRODxxxxx'
if($string -match $keyword){write-host 'matched'}
Either use the String.Contains() method:
$A = 'PROD'
$B = 'xxxxPRODxxxx'
$B.Contains($A)
or use the -like operator:
$B -like "*$A*"
Related
First time posting.
i have the following code to replace the suffix of an email and its working fine
replace all characters after # sign with #testdomain.com
$a = 'john.doe#domain.com'
$b = $a -replace "[?=#].*", '#testdomain.com'
$b
john.doe#testdomain.com
what i would like to do, is to capture the actual left side 'source' regex expression to a variable, which would be #domain.com so that i know what i;m replacing and i don;t know how to do it.
Sorry if this had been posted before.
Thank you
So, I'm not sure if this is possible using only the -replace operator and without the use of -match which would store the capture group on the $Matches automatic variable.
This is how you could do it using the regex class directly:
$a = 'john.doe#domain.com'
$Capture = #{}
$b = [regex]::Replace($a, "[?=#].*", {
param($s)
'#testdomain.com'
$Capture.Value = $s.Value
})
$b # => john.doe#testdomain.com
$Capture.Value # => #domain.com
This what I could think using only -replace, adding a delimiter (// in this case) to the replaced string followed by the capture group $0 and then splitting the replacement. Though, this is obviously not a robust solution.
$a = 'john.doe#domain.com'
$b, $capture = $a -replace "[?=#].*", '#testdomain.com//$0' -split '//'
$b # => john.doe#testdomain.com
$capture # => #domain.com
To change the user part you can replace ^.*(?=#):
PS ~> $a = 'john.doe#domain.com'
PS ~> $a -replace '^.*(?=#)', 'jane.doe'
jane.doe#domain.com
The (?=#) construct is known as a lookahead, and describes a zero-length string at the position immediately before the #.
Here is the simple powershell code -
$arr = #()
$a = [PSCustomObject]#{
a = 'a'
b = 'b'
}
$arr += $a
$b = [PSCustomObject]#{
a = 'c'
b = 'd'
}
$arr += $b
$f = $arr | Where-Object {$_.a -eq 'a'}
$f.a = '1'
Write-Host "`$a.a=$($a.a); `$f.a=$($f.a)"
$f.a = '11'
Write-Host "`$a.a=$($a.a); `$f.a=$($f.a)"
Output:
$a.a=1; $f.a=1
$a.a=11; $f.a=11
My problem is - How the changing of $f value is also changing the value of $a value? I'm not aware of this concept.
And, what can I do to avoid this behavior?
Type [PSCustomObject] is a reference type, so multiple variables can "point to" (reference) a given instance; see this answer for more information about reference types vs. value types.
If you want to create a copy (a shallow clone) of a [PSCustomObject] instance, call .psobject.Copy():
$f = ($arr | Where-Object {$_.a -eq 'a'}).psobject.Copy()
Question:
The intention of my script is to filter out the name and phone number from both text files and add them into a hash table with the name being the key and the phone number being the value.
The problem I am facing is
$name = $_.Current is returning $null, as a result of which my hash is not getting populated.
Can someone tell me what the issue is?
Contents of File1.txt:
Lori
234 east 2nd street
Raleigh nc 12345
9199617621
lori#hotmail.com
=================
Contents of File2.txt:
Robert
2531 10th Avenue
Seattle WA 93413
2068869421
robert#hotmail.com
Sample Code:
$hash = #{}
Switch -regex (Get-content -Path C:\Users\svats\Desktop\Fil*.txt)
{
'^[a-z]+$' { $name = $_.current}
'^\d{10}' {
$phone = $_.current
$hash.Add($name,$phone)
$name=$phone=$null
}
default
{
write-host "Nothing matched"
}
}
$hash
Remove the current property reference from $_:
$hash = #{}
Switch -regex (Get-content -Path C:\Users\svats\Desktop\Fil*.txt)
{
'^[a-z]+$' {
$name = $_
}
'^\d{10}' {
$phone = $_
$hash.Add($name, $phone)
$name = $phone = $null
}
default {
Write-Host "Nothing matched"
}
}
$hash
Mathias R. Jessen's helpful answer explains your problem and offers an effective solution:
it is automatic variable $_ / $PSItem itself that contains the current input object (whatever its type is - what properties $_ / $PSItem has therefore depends on the input object's specific type).
Aside from that, there's potential for making the code both less verbose and more efficient:
# Initialize the output hashtable.
$hash = #{}
# Create the regex that will be used on each input file's content.
# (?...) sets options: i ... case-insensitive; m ... ^ and $ match
# the beginning and end of every *line*.
$re = [regex] '(?im)^([a-z]+|\d{10})$'
# Loop over each input file's content (as a whole, thanks to -Raw).
Get-Content -Raw File*.txt | foreach {
# Look for name and phone number.
$matchColl = $re.Matches($_)
if ($matchColl.Count -eq 2) { # Both found, add hashtable entry.
$hash.Add($matchColl.Value[0], $matchColl.Value[1])
} else {
Write-Host "Nothing matched."
}
}
# Output the resulting hashtable.
$hash
A note on the construction of the .NET [System.Text.RegularExpressions.Regex] object (or [regex] for short), [regex] '(?im)^([a-z]+|\d{10})$':
Embedding matching options IgnoreCase and Multiline as inline options i and m directly in the regex string ((?im) is convenient, in that it allows using simple cast syntax ([regex] ...) to construct the regular-expression .NET object.
However, this syntax may be obscure and, furthermore, not all matching options are available in inline form, so here's the more verbose, but easier-to-read equivalent:
$re = New-Object regex -ArgumentList '^([a-z]+|\d{10})$', 'IgnoreCase, Multiline'
Note that the two options must be specified comma-separated, as a single string, which PowerShell translates into the bit-OR-ed values of the corresponding enumeration values.
other solution, use convertfrom-string
$template=#'
{name*:Lori}
{street:234 east 2nd street}
{city:Raleigh nc 12345}
{phone:9199617621}
{mail:lori#hotmail.com}
{name*:Robert}
{street:2531 10th Avenue}
{city:Seattle WA 93413}
{phone:2068869421}
{mail:robert#hotmail.com}
{name*:Robert}
{street:2531 Avenue}
{city:Seattle WA 93413}
{phone:2068869421}
{mail:robert#hotmail.com}
'#
Get-Content -Path "c:\temp\file*.txt" | ConvertFrom-String -TemplateContent $template | select name, phone
I want to split one output. the output is
02|05|002|004|0014|0035|R
I tried with
$state.ToString().Split("|")[0]
i got the result like System.Object[]
i want to split the output and assigning to variables like
$a='02'
$b='05'
please help me to complete this
Here's a simplified solution that uses the range operator to return the first two elements and assign them to variables:
$a,$b = '02|05|002|004|0014|0035|R'.Split('|')[0..1]
Put them to the array using select -first
$state = '02|05|002|004|0014|0035|R'
$list = #()
$list = $state.ToString().Split("|") | select -First 2
[string] $a = $list[0]
[string] $b = $list[1]
write-host $a
write-host $b
I'm trying to alternate a setting in a config file using PowerShell. For example, if a certain value is true, I'd like to switch it to false. If it's false, I'd like to switch it to true. I'd also like to change a path from \\servername\folder\ to \\servername\. Is there a way I can perform this in PowerShell without using an intermediate value?
If I do this:
$foo = 'aaa'
$foo -replace 'aaa', 'bbb' -replace 'bbb', 'aaa'
$foo will always be 'aaa'. I realize I could make an intermittent change ('aaa' becomes 'ccc' and then changes to 'bbb') but that's messy to read.
How can I alternate values without using an intermediate value?
I'm not quite sure what you're trying to achieve. Do you want to switch two values without a buffer variable? Or do you want to toggle a value between two states? The latter can be achieved like this:
function Toggle($s, $v1, $v2) {
$e1 = [regex]::Escape($v1)
$e2 = [regex]::Escape($v2)
$r = $s
if ($s -match $e1) {
$r = $s -replace $e1, $v2
} elseif ($s -match $e2) {
$r = $s -replace $e2, $v1
}
return ($r)
}
$foo = "..."
Toggle $foo "\\servername\folder\" "\\servername\"
Using a match evaluator. Not sure if this is any better or not.
Begin{
[regex]$ValueRegex = 'aaa|bbb'
$ValueToggles = #{
aaa='bbb'
bbb='aaa'
}
$toggleValue = {$ValueToggles[$args[0].groups[0].value]}
}
Process{
$foo = 'Value: aaa'
$ValueRegex.replace($foo,$toggleValue)
}
Value: bbb
You can alternate a boolean value ($true or $false) simply by using the -not operator; e.g.:
PS C:\> $value = $true
PS C:\> $value = -not $value
PS C:\> $value
False
Regular expression replacement:
PS C:\> '\\servername\folder\' -replace '^(\\\\[^\\]+)\\[^\\]+', '$1'
\\servername\
Bill