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 $b
Related
I have line of scripts for review here, I noticed variable declaration with a value:
function readConfig {
Param([string]$fileName)
$config = #{}
Get-Content $fileName | Where-Object {
$_ -like '*=*'
} | ForEach-Object {
$key, $value = $_ -split '\s*=\s*', 2
$config[$key] = $value
}
return $config
}
I wonder what #{} means in $config = #{}?
#{} in PowerShell defines a hashtable, a data structure for mapping unique keys to values (in other languages this data structure is called "dictionary" or "associative array").
#{} on its own defines an empty hashtable, that can then be filled with values, e.g. like this:
$h = #{}
$h['a'] = 'foo'
$h['b'] = 'bar'
Hashtables can also be defined with their content already present:
$h = #{
'a' = 'foo'
'b' = 'bar'
}
Note, however, that when you see similar notation in PowerShell output, e.g. like this:
abc: 23
def: #{"a"="foo";"b"="bar"}
that is usually not a hashtable, but the string representation of a custom object.
The meaning of the #{}
can be seen in diffrent ways.
If the #{} is empty, an empty hash table is defined.
But if there is something between the curly brackets it can be used in a contex of an splatting operation.
Hash Table
Splatting
I think there is no need in explaining what an hash table is.
Splatting is a method of passing a collection of parameter values to a command as unit.
$prints = #{
Name = "John Doe"
Age = 18
Haircolor = "Red"
}
Write-Host #prints
Hope it helps! BR
Edit:
Regarding the updated code from the questioner the answer is
It defines an empty hash table.
Be aware that Get-Content has its own parameters!
THE MOST IMPORTANT 1:
[-Raw]
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*"
Curious about how to loop through a hash table where each value is an array. Example:
$test = #{
a = "a","1";
b = "b","2";
c = "c","3";
}
Then I would like to do something like:
foreach ($T in $test) {
write-output $T
}
Expected result would be something like:
name value
a a
b b
c c
a 1
b 2
c 3
That's not what currently happens and my use case is to basically pass a hash of parameters to a function in a loop. My approach might be all wrong, but figured I would ask and see if anyone's tried to do this?
Edit**
A bit more clarification. What I'm basically trying to do is pass a lot of array values into a function and loop through those in the hash table prior to passing to a nested function. Example:
First something like:
$parameters = import-csv .\NewComputers.csv
Then something like
$parameters | New-LabVM
Lab VM Code below:
function New-LabVM
{
[CmdletBinding()]
Param (
# Param1 help description
[Parameter(Mandatory=$true,
Position=0,
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true)]
[Alias("p1")]
[string[]]$ServerName,
# Param2 help description
[Parameter(Position = 1)]
[int[]]$RAM = 2GB,
# Param3 help description
[Parameter(Position=2)]
[int[]]$ServerHardDriveSize = 40gb,
# Parameter help description
[Parameter(Position=3)]
[int[]]$VMRootPath = "D:\VirtualMachines",
[Parameter(Position=4)]
[int[]]$NetworkSwitch = "VM Switch 1",
[Parameter(Position=4)]
[int[]]$ISO = "D:\ISO\Win2k12.ISO"
)
process
{
New-Item -Path $VMRootPath\$ServerName -ItemType Directory
$Arguments = #{
Name = $ServerName;
MemoryStartupBytes = $RAM;
NewVHDPath = "$VMRootPath\$ServerName\$ServerName.vhdx";
NewVHDSizeBytes = $ServerHardDriveSize
SwitchName = $NetworkSwitch;}
foreach ($Argument in $Arguments){
# Create Virtual Machines
New-VM #Arguments
# Configure Virtual Machines
Set-VMDvdDrive -VMName $ServerName -Path $ISO
Start-VM $ServerName
}
# Create Virtual Machines
New-VM #Arguments
}
}
What you're looking for is parameter splatting.
The most robust way to do that is via hashtables, so you must convert the custom-object instances output by Import-Csv to hashtables:
Import-Csv .\NewComputers.csv | ForEach-Object {
# Convert the custom object at hand to a hashtable.
$htParams = #{}
$_.psobject.properties | ForEach-Object { $htParams[$_.Name] = $_.Value }
# Pass the hashtable via splatting (#) to the target function.
New-LabVM #htParams
}
Note that since parameter binding via splatting is key-based (the hashtable keys are matched against the parameter names), it is fine to use a regular hashtable with its unpredictable key ordering (no need for an ordered hashtable ([ordered] #{ ... }) in this case).
Try this:
for($i=0;$i -lt $test.Count; $i++)
{$test.keys | %{write-host $test.$_[$i]}}
Weirdly, it outputs everything in the wrong order (because $test.keys outputs it backwards).
EDIT: Here's your solution.
Using the [System.Collections.Specialized.OrderedDictionary] type, you guarantee that the output will come out the same order as you entered it.
$test = [ordered] #{
a = "a","1";
b = "b","2";
c = "c","3";
}
After running the same solution code as before, you get exactly the output you wanted.
This question already has answers here:
Powershell create array of arrays
(3 answers)
Closed 5 years ago.
This is building $ret into a long 1 dimensional array rather than an array of arrays. I need it to be an array that is populated with $subret objects. Thanks.
$ret = #()
foreach ($item in $items){
$subret = #()
$subRet = $item.Name , $item.Value
$ret += $subret
}
there might be other ways but arraylist normally works for me, in this case I would do:
$ret = New-Object System.Collections.ArrayList
and then
$ret.add($subret)
The suspected preexisting duplicate question is indeed a duplicate:
Given that + with an array as the LHS concatenates arrays, you must nest the RHS with the unary form of , (the array-construction operator) if it is an array that should be added as a single element:
# Sample input
$items = [pscustomobject] #{ Name = 'n1'; Value = 'v1'},
[pscustomobject] #{ Name = 'n2'; Value = 'v2'}
$ret = #() # create an empty *array*
foreach ($item in $items) {
$subret = $item.Name, $item.Value # use of "," implicitly creates an array
$ret += , $subret # unary "," creates a 1-item array
}
# Show result
$ret.Count; '---'; $ret[0]; '---'; $ret[1]
This yields:
2
---
n1
v1
---
n2
v2
The reason the use of [System.Collections.ArrayList] with its .Add() method worked too - a method that is generally preferable when building large arrays - is that .Add() only accepts a single object as the item to add, irrespective of whether that object is a scalar or an array:
# Sample input
$items = [pscustomobject] #{ Name = 'n1'; Value = 'v1'},
[pscustomobject] #{ Name = 'n2'; Value = 'v2'}
$ret = New-Object System.Collections.ArrayList # create an *array list*
foreach ($item in $items) {
$subret = $item.Name, $item.Value
# .Add() appends whatever object you pass it - even an array - as a *single* element.
# Note the need for $null = to suppress output of .Add()'s return value.
$null = $ret.Add($subret)
}
# Produce sample output
$ret.Count; '---'; $ret[0]; '---'; $ret[1]
The output is the same as above.
Edit
It is more convoluted to create an array of tuples than fill an array with PsObjects containing Name Value as the two properties.
Select the properties you want from $item then add them to the array
$item = $item | select Name, Value
$arr = #()
$arr += $item
You can reference the values in this array by doing this
foreach($obj in $arr)
{
$name = $obj.Name
$value = $obj.Value
# Do actions with the values
}
Say I have 2 powershell hashtables one big and one small and, for a specific purpose I want to say they are equal if for the keys in the small one, the keys on the big hastable are the same.
Also I don't know the names of the keys in advance. I can use the following function that uses Invoke-Expression but I am looking for nicer solutions, that don't rely on this.
Function Compare-Subset {
Param(
[hashtable] $big,
[hashtable] $small
)
$keys = $small.keys
Foreach($k in $keys) {
$expression = '$val = $big.' + "$k" + ' -eq ' + '$small.' + "$k"
Invoke-Expression $expression
If(-not $val) {return $False}
}
return $True
}
$big = #{name='Jon'; car='Honda'; age='30'}
$small = #{name = 'Jon'; car='Honda'}
Compare-Subset $big $small
A simple $true/$false can easily be gotten. This will return $true if there are no differences:
[string]::IsNullOrWhiteSpace($($small|Select -Expand Keys|Where{$Small[$_] -ne $big[$_]}))
It checks for all keys in $small to see if the value of that key in $small is the same of the value for that key in $big. It will only output any values that are different. It's wrapped in a IsNullOrWhitespace() method from the [String] type, so if any differences are found it returns false. If you want to list differences just remove that method.
This could be the start of something. Not sure what output you are looking for but this will output the differences between the two groups. Using the same sample data that you provided:
$results = Compare-Object ($big.GetEnumerator() | % { $_.Name }) ($small.GetEnumerator() | % { $_.Name })
$results | ForEach-Object{
$key = $_.InputObject
Switch($_.SideIndicator){
"<="{"Only reference object has the key: '$key'"}
"=>"{"Only difference object has the key: '$key'"}
}
}
In primetime you would want something different but just to show you the above would yield the following output:
Only reference object has the key: 'age'