Many of us tend to jump quickly, into a new programming or scripting language, applying knowledge we’ve learned elsewhere to the current task at hand. Broadly speaking this works well but these always a little gotcha to trip you up!
A good example is the Powershell -contains operator. It’s not like .Net String.Contains method as you might first think.
$var = "Rhys Campbell"; $var -contains "Rhys";
The result of this is false. Why? Because the -contains operator in Powershell is used for testing for items in an array.
$var = "Rhys Campbell", "Joe Bloggs"; $var -contains "Rhys Campbell";
Will return true , but;
$var -contains "Rhys*";
Will return false as wildcards will not work as we assume they will. For wildcard matching we can use the -match operator.
$var = "Rhys Campbell"; $var -match "Rhys";
This will return true when matching simple strings or the matching items from an array of strings. Now I’m going to try and remember what assumption is the mother of (NSFW, contains cussing).