October 28, 2019 by Kenneth Fisher
I’m a DBA. Data types are kind of important to me. I mean I know they are important to developers as well but spend some time as a DBA and they get really important. That makes these two methods of particular interest to me.
I’m not 100% certain what all of the types available are but it looks like they are the .NET types with the option to create more.
#Create/set variables $IntVar = 1 $IntArrayVar = 1,2,3 $StringVar = "Test" $StringArrayVar = "Test","MoreTest" #GetType() Demo $IntVar.GetType() $IntArrayVar.GetType() $IntArrayVar.GetType() $StringVar.GetType() $StringArrayVar.GetType() $StringArrayVar.GetType()
You’ll notice that arrays are just listed as array and that I had to pull just a single element to get the actual type. This kind of makes sense since these variables aren’t specifically typed. If you do specifically type them you get better information:
#Create/set variables [int]$IntVarTyped = 1 [int]$IntArrayVarTyped = 1,2,3 [string]$StringVarTyped = "Test" [string]$StringArrayVarTyped = "Test","MoreTest" #GetType() Demo with typed variables $IntVarTyped.GetType() $IntArrayVarTyped.GetType() $StringVarTyped.GetType() $StringArrayVarTyped.GetType()
You’ll notice that now we get a basetype of System.Array and a name of Int32 or String depending (The s tell you its an array.)
GetTypeCode() gives you less information (just the name) but is pretty similar.
#GetTypeCode() Demo $IntVar.GetTypeCode() $IntArrayVar.GetTypeCode() $StringVar.GetTypeCode() $StringArrayVar.GetTypeCode()
Now wait a minute. I only have 4 variables. How did I get back 7 responses? Well GetTypeCode() seems to return a separate line for each element in the array. So an untyped array with two INTs and a STRING would give back explicit information about what’s in the array. INT, INT, STRING for example. So what happens if we type the variables?
#GetTypeCode() Demo with typed variables $IntVarTyped.GetTypeCode() $IntArrayVarTyped.GetTypeCode() $StringVarTyped.GetTypeCode() $StringArrayVarTyped.GetTypeCode()
Exactly the same. Well that was good to know, if a bit boring.
Note: It appears that while GetTypeCode() is simpler returns a bit more specific information it isn’t always available. I tried this:
$Procs = Get-Process
And GetType() worked while GetTypeCode wasn’t available. From what I can tell GetType() is part of the system object and GetTypeCode is part of the type object.