How to check if string does not contain many substrings in PowerShell

Question

I have a string like this:

$string = "Test file.cs file.sql file.xml"

I want to check if the string contains a file with .sql and not contains a file with .cs and many other file extensions.

So far I have a very long script to check it:

if($string.Contains(".sql") -and (!$string.Contains(".cs") -or (!$string.Contains(".js")))) # and more....

Is there easy way to do it?

Something like:

$ext = "cs,css,js,xml"
if(!$string.Cotnains($ext))

Maximilian Burszley · Accepted Answer · 2019-07-31 13:14:50Z

1

I'd suggest regex here:

$exts= '\.(cs|css|js|xml)'
$string = 'Test file.cs file.sql file.xml'

$string -notmatch $extensions

answered Jul 31, 2019 at 13:14

Maximilian Burszley

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Comments

Razorfen · Accepted Answer · 2019-07-31 13:10:21Z

0

Maybe I understood the question wrong, but you may want to look at the -in operator like so:

$string = "Test file.cs file.sql file.xml"
$extensions = "cs", "css", "js", "xml"

if ($string -in $extensions) {
    "$string not in ext"
} else {
    "$string in ext"
}

answered Jul 31, 2019 at 13:10

Razorfen

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JosefZ · Accepted Answer · 2019-07-31 14:31:40Z

0

An alternative to the valuable TheIncorrigible1's answer:

$extsContain = '\.(sql)\b'
$extsRefused = '\.(cs|css|js|xml)\b'
$strings =  'Test1 file.cs  file.sql file.xm',
            'Test2 file.ces file.qls file.yml',
            'Test3 file.csa file.sql file.xml',
            'Test4 file.csa file.sql file.pxml',
            'Test5 file.csa file.rql file.axml'

@($strings) -match $extsContain -notmatch $extsRefused

Output:

D:\PShell\SO\57291315.ps1

Test4 file.csa file.sql file.pxml

edited Jul 31, 2019 at 14:31

answered Jul 31, 2019 at 14:06

JosefZ

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1 Comment

Maximilian Burszley Over a year ago

Note that this will only work if you're testing against an array, otherwise the second match will be testing against the string literal True or False.

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