PowerShell Basics: Detecting if a String Ends with a Certain Character

Copper Contributor

Jan 03, 2019

Joel Francis I just installed PS Core 6.1.1 and got similar results as you. I also tested your array index method and it's even faster than .EndsWith():

RegEx method: 125 ms
EndsWith method: 17 ms
Like method: 52 ms
Array index method: 9 ms

Code for array index method:

$stopwatch = [Stopwatch]::StartNew();
for ($i = 0; $i -lt 100000; $i++) {
    $boolValue = 'something\'[-1] -eq '\'
}
"Array index method: $($stopwatch.ElapsedMilliseconds) ms "

Also, the times in my previous comment were generated using the play button (Run Script) in Windows PowerShell ISE, which adds debugging overhead. When I run it directly in PowerShell.exe (5.1.1) I get similar results to PS Core:

RegEx method: 127 ms 
EndsWith method: 23 ms 
Like method: 44 ms 
Array index method: 14 ms

(In the end, unless you're checking the ends of many strings or performance matters a lot, it doesn't really matter what method you use. Personally I'll probably stick with -Like because I like it. ;)

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PowerShell Basics: Detecting if a String Ends with a Certain Character