I am having below PowerShell script which does not result in the sorting order I want.
$string = #("Project-a1-1", "Project-a1-10", "Project-a1-2", "Project-a1-5", "Project-a1-6", "Project-a1-8")
$myobjecttosort=#()
$string | ForEach{
$myobjecttosort+=New-Object PSObject -Property #{
'String'=$_
'Numeric'=[int]([regex]::Match($_,'\d+')).Value
}
}
$myobjecttosort | Sort-Object Numeric | Select Numeric,String | Format-Table -AutoSize
The output of the above script:
Numeric String
1 Project-a1-5
1 Project-a1-6
1 Project-a1-8
1 Project-a1-1
1 Project-a1-10
1 Project-a1-2
Required Output
1 Project-a1-1
2 Project-a1-2
3 Project-a1-5
4 Project-a1-6
5 Project-a1-8
6 Project-a1-10
Also, I want always output to be returned as the last value so here output would be Project-a1-10
Sort-Object accepts a script block allowing for a more robust sort. With that said, just like any other object in the pipeline, the objects are accessible via $PSItem, or $_. So, a quick way to go about this is splitting the string at the - selecting just the ending numerical digits, then casting [int] to the result to sort by.
$string = "Project-a1-1", "Project-a1-10", "Project-a1-2", "Project-a1-5", "Project-a1-6", "Project-a1-8"
$string |
Sort-Object -Property { [int]($_ -replace '^.*?(?=\d+$)') } |
% { $i = 1 } {
'{0} {1}' -f $i++, $_
}
The above yields:
1 Project-a1-1
2 Project-a1-2
3 Project-a1-5
4 Project-a1-6
5 Project-a1-8
6 Project-a1-10
Passing the sorted items to % (alias to Foreach-Object), we can then format a new string giving it an index # to each string starting at 1.
Related
I've got this Hashtable with this values:
Name Value
---- -----
Bayas_palm_stem_A0311.jpg 1
Bayas_palm_stem_A0312.jpg 2
Bukit_Bangkong_area.tiff 1
BY_and_siblings_A0259.jpg 5
Cassava_camp_A0275.jpg 1
Children_A0115.jpg 6
cip_barau_kubak.jpg 1
How can i get only the Name and Value where Value is greater than 1 ?
I'm tryng with this code, but i'm doing something wrong!!!
$RT | Group-Object Name , Value | Where-Object {$RT.Values -gt 1}
Thanks a lot for any help.
Use $hashtable.GetEnumerator() to enumerate the individual name-value pairs in the hashtable:
$RT.GetEnumerator() |Where-Object {$_.Value -gt 1}
Beware that if you assign the resulting pairs to a variable, it's not longer a hashtable - it's just an array of individual name-value pairs.
To create a new hashtable with only the name-value pairs that filter through, do:
$RTFiltered = #{}
$RT.GetEnumerator() |Where-Object {$_.Value -gt 1} |ForEach-Object {$RTFiltered.Add($_.Name, $_.Value)}
Like this:
$RT.getenumerator() | Where-Object {$_.Value -gt 1}
Assuming you have a Hashtable defined like this.
$rt = #{
"Bayas_palm_stem_A0311.jpg " = 1
"Bayas_palm_stem_A0312.jpg " = 2
"Bukit_Bangkong_area.tiff " = 1
"BY_and_siblings_A0259.jpg " = 5
"Cassava_camp_A0275.jpg " = 1
"Children_A0115.jpg " = 6
"cip_barau_kubak.jpg " = 1
}
You can call GetEnumerator() which allows you to iterate through the Hashtable.
Once you've got an enumeration of the members, then your normal PowerShell value comparisons will work.
You can get values greater than 1 like this:
$rt.GetEnumerator() | ? Value -gt 1
Name Value
---- -----
BY_and_siblings_A0259.jpg 5
Children_A0115.jpg 6
Bayas_palm_stem_A0312.jpg 2
I'm currently using the Get-Random function of Powershell to randomly pull a set number of rows from a csv. I need to create a constraint that says if one id is pulled, find the other ids that match it and pull their value.
Here is what I currently have:
$chosenOnes = Import-CSV C:\Temp\pk2.csv | sort{Get-Random} | Select -first 6
$i = 1
$count = $chosenOnes | Group-Object householdID
foreach ($row in $count)
{
if ($row.count -gt 1)
{
$students = $row.Group.Student
foreach ($student in $students)
{
$name = $student.tostring()
#...do something
$i = $i + 1
}
}
else
{
$name = $row.Group.Student
if($i -le 5)
{
#...do something
}
else
{
#...do something
}
$i = $i + 1
}
}
Example dataset
ID,name
165,Ernest Hemingway
1204,Mark Twain
1578,Stephen King
1634,Charles Dickens
1726,George Orwell
7751,John Doe
7751,Tim Doe
In this example, there are 7 rows but I'm randomly selecting 6 in my code. What needs to happen is when ID=7751 then I must return both rows where ID=7751. The IDs cannot not be statically set in the code.
Use Get-Random directly, with -Count, to extract a given number of random elements from a collection.
$allRows = Import-CSV C:\Temp\pk2.csv
$chosenHouseholdIDs = ($allRows | Get-Random -Count 6).householdID
Then filter all rows by whether their householdID column contains one of the 6 randomly selected rows' householdID values (PSv3+ syntax), using the -in array-containment operator:
$allRows | Where-Object householdID -in $chosenHouseholdIDs
Optional reading: performance considerations:
$allRows | Get-Random -Count 6 is not only conceptually simpler, but also much faster than $allRows | Sort-Object { Get-Random } | Select-Object -First 6
Using the Time-Command function to compare the performance of two approaches, using a 1000-row test file with 10 columns yields the following sample timings on my Windows 10 VM in Windows PowerShell - note that the Sort-Object { Get-Random }-based solution is more than 15(!) times slower:
Factor Secs (100-run avg.) Command TimeSpan
------ ------------------- ------- --------
1.00 0.007 $allRows | Get-Random -Count 6 00:00:00.0072520
15.65 0.113 $allRows | Sort-Object { Get-Random } | Select-Object -First 6 00:00:00.1134909
Similarly, a single pass through all rows to find matching IDs via array-containment operator -in performs much better than looping over the randomly selected IDs and searching all rows for each.
I tried sticking with your beginning and came up with this.
$Array = Import-CSV C:\test\StudtentTest.csv
$Array | Sort{Get-Random} | select -first 2 | %{
$id = $_.id
$Array | ?{$_.id -eq $id} | %{
$_
}
}
$Array will be your parsed CSV
We pipe in and sort by random select -first 2 (in this case)
Save the ID of the object into $id and then search the array for that ID and dispaly each that matches
If same ID does match you end up with something like
ID name
-- ----
7751 John Doe
7751 Tim Doe
1634 Charles Dickens
I have a system that currently reads data from a CSV file produced by a separate system that is going to be replaced.
The imported CSV file looks like this
PS> Import-Csv .\SalesValues.csv
Sale Values AA BB
----------- -- --
10 6 5
5 3 4
3 1 9
To replace this process I hope to produce an object that looks identical to the CSV above, but I do not want to continue to use a CSV file.
I already have a script that reads data in from our database and extracts the data that I need to use. I'll not detail the fairly long script that preceeds this point but in effect it looks like this:
$SQLData = Custom-SQLFunction "SELECT * FROM SALES_DATA WHERE LIST_ID = $LISTID"
$SQLData will contain ~5000+ DataRow objects that I need to query.
One of those DataRow object looks something like this:
lead_id : 123456789
entry_date : 26/10/2018 16:51:16
modify_date : 01/11/2018 01:00:02
status : WRONG
user : mrexample
vendor_lead_code : TH1S15L0NGC0D3
source_id : A543212
list_id : 333004
list_name : AA Some Text
gmt_offset_now : 0.00
SaleValue : 10
list_name is going to be prefixed with AA or BB.
SaleValue can be any integer 3 and up, however realistically extremely unlikely to be higher than 100 (as this is a monthly donation) and will be one of 3,5,10 in the vast majority of occurrences.
I already have script that takes the content of list_name, creates and populates the data I need to use into two separate psobjects ($AASalesValues and $BBSalesValues) that collates the total numbers of 'SaleValue' across the data set.
Because I cannot reliably anticipate the value of any SaleValue I have to dynamically create the psobjects properties like this
foreach ($record in $SQLData) {
if ($record.list_name -match "BB") {
if ($record.SaleValue -gt 0) {
if ($BBSalesValues | Get-Member -Name $($record.SaleValue) -MemberType Properties) {
$BBSalesValues.$($record.SaleValue) = $BBSalesValues.$($record.SaleValue)+1
} else {
$BBSalesValues | Add-Member -Name $($record.SaleValue) -MemberType NoteProperty -Value 1
}
}
}
}
The two resultant objects look like this:
PS> $AASalesValues
10 5 3 50
-- - - --
17 14 3 1
PS> $BBSalesvalues
3 10 5 4
- -- - -
36 12 11 1
I now have the data that I need, however I need to format it in a way that replicates the format of the CSV so I can pass it directly to another existing powershell script that is configured to expect the data in the format that the CSV is in, but I do not want to write the data to a file.
I'd prefer to pass this directly to the next part of the script.
Ultimately what I want to do is to produce a new object/some output that looks like the output from Import-Csv command at the top of this post.
I'd like a new object, say $OverallSalesValues, to look like this:
PS>$overallSalesValues
Sale Values AA BB
50 1 0
10 17 12
5 14 11
4 0 1
3 3 36
In the above example the values from $AASalesValues is listed under the AA column, the values from $BBSalesValues is listed under the BB column, with the rows matching the headers of the two original objects.
I did try this with hashtables but I was unable to work out how to both create them from dynamic values and format them to how I needed them to look.
Finally got there.
$TotalList = #()
foreach($n in 3..200){
if($AASalesValues.$n -or $BBSalesValues.$n){
$AACount = $AASalesValues.$n
$BBcount = $BBSalesValues.$n
$values = [PSCustomObject]#{
'Sale Value'= $n
AA = $AACount
BB = $BBcount
}
$TotalList += $values
}
}
$TotalList
produces an output of
Sale Value AA BB
---------- -- --
3 3 36
4 2
5 14 11
10 18 12
50 1
Just need to add a bit to include '0' values instead of $null.
I'm going to assume that $record contains a list of the database results for either $AASalesValues or $BBSalesValues, not both, otherwise you'd need some kind of selector to avoid counting records of one group with the other group.
Group the records by their SaleValue property as LotPings suggested:
$BBSalesValues = $record | Group-Object SaleValue -NoElement
That will give you a list of the SaleValue values with their respective count.
PS> $BBSalesValues
Count Name
----- ----
36 3
12 10
11 5
1 4
You can then update your CSV data with these values like this:
$file = 'C:\path\to\data.csv'
# read CSV into a hashtable mapping the sale value to the complete record
# (so that we can lookup the record by sale value)
$csv = #{}
Import-Csv $file | ForEach-Object {
$csv[$_.'Sale Values'] = $_
}
# Add records for missing sale values
$($AASalesValues; $BBSalesValues) | Select-Object -Expand Name -Unique | ForEach-Object {
if (-not $csv.ContainsKey($_)) {
$csv[$_] = New-Object -Type PSObject -Property #{
'Sale Values' = $_
'AA' = 0
'BB' = 0
}
}
}
# update records with values from $AASalesValues
$AASalesValues | ForEach-Object {
[int]$csv[$_.Name].AA += $_.Count
}
# update records with values from $BBSalesValues
$BBSalesValues | ForEach-Object {
[int]$csv[$_.Name].BB += $_.Count
}
# write updated records back to file
$csv.Values | Export-Csv $file -NoType
Even with your updated question the approach would be pretty much the same, you'd just add another level of grouping for collecting the sales numbers:
$sales = #{}
$record | Group-Object {$_.list_name.Split()[0]} | ForEach-Object {
$sales[$_.Name] = $_.Group | Group-Object SaleValue -NoElement
}
and then adjust the merging to something like this:
$file = 'C:\path\to\data.csv'
# read CSV into a hashtable mapping the sale value to the complete record
# (so that we can lookup the record by sale value)
$csv = #{}
Import-Csv $file | ForEach-Object {
$csv[$_.'Sale Values'] = $_
}
# Add records for missing sale values
$sales.Values | Select-Object -Expand Name -Unique | ForEach-Object {
if (-not $csv.ContainsKey($_)) {
$prop = #{'Sale Values' = $_}
$sales.Keys | ForEach-Object {
$prop[$_] = 0
}
$csv[$_] = New-Object -Type PSObject -Property $prop
}
}
# update records with values from $sales
$sales.GetEnumerator() | ForEach-Object {
$name = $_.Key
$_.Value | ForEach-Object {
[int]$csv[$_.Name].$name += $_.Count
}
}
# write updated records back to file
$csv.Values | Export-Csv $file -NoType
I have two CSV Files which look like this:
test.csv:
"Col1","Col2"
"1111","1"
"1122","2"
"1111","3"
"1121","2"
"1121","2"
"1133","2"
"1133","2"
The second looks like this:
test2.csv:
"Number","signs"
"1111","ABC"
"1122","DEF"
"1111","ABC"
"1121","ABC"
"1133","GHI"
Now the goal is to get a summary of all points from test.csv assigned to the "signs" of test2.csv. Reference are the numbers, as you may see.
Should be something like this:
ABC = 8
DEF = 2
GHI = 4
I have tried to test this out but cannot get the goal. What I have so far is:
$var = "C:\PathToCSV"
$csv1 = Import-Csv "$var\test.csv"
$csv2 = Import-Csv "$var\test2.csv"
# Process: group by 'Item' then sum 'Average' for each group
# and create output objects on the fly
$test1 = $csv1 | Group-Object Col1 | ForEach-Object {
New-Object psobject -Property #{
Col1 = $_.Name
Sum = ($_.Group | Measure-Object Col2 -Sum).Sum
}
}
But this gives me back the following output:
Ps> $test1
Sum Col1
--- ----
4 1111
2 1122
4 1121
4 1133
I am not able to get the summary and the mapping of the signs.
Not sure if I understand your question correctly, but I'm going to assume that for each value from the column "signs" you want to lookup the values from the column "Number" in the second CSV and then calculate the sum of the column "Col2" for all matches.
For that I'd build a hashtable with the pre-calculated sums for the unique values from "Col1":
$h1 = #{}
$csv1 | ForEach-Object {
$h1[$_.Col1] += [int]$_.Col2
}
and then build a second hashtable to sum up the lookup results for the values from the second CSV:
$h2 = #{}
$csv2 | ForEach-Object {
$h2[$_.signs] += $h1[$_.Number]
}
However, that produced a different value for "ABC" than what you stated as the desired result in your question when I processed your sample data:
Name Value
---- -----
ABC 12
GHI 4
DEF 2
Or did you mean you want to sum up the corresponding values for the unique numbers for each sign? For that you'd change the second code snippet to something like this:
$h2 = #{}
$csv2 | Group-Object signs | ForEach-Object {
$name = $_.Name
$_.Group | Select-Object -Unique -Expand Number | ForEach-Object {
$h2[$name] += $h1[$_]
}
}
That would produce the desired result from your question:
Name Value
---- -----
ABC 8
GHI 4
DEF 2
The following script can transform(pivot) the array by the third column (x, y). However, it needs to concatenate the first two columns for the group-object command. And then the Name of the output need to be split to get the original values.
It can be error prone if the data has the separator character. And it seems not performance optimized since extra string concatenation/split actions are needed. Is it a more direct way (like SQL group clause) in powershell?
$a =#('a','b','x',10),
#('a','b','y',20),
#('c','e','x',50),
#('c','e','y',30)
# $a | % { "[$_]"}
$a | %{
new-object PsObject -prop #{
label = "$($_[0]),$($_[1])" # Concatenate for grouping
value = #{ $_[2] = $_[3] }
}
} |
group label | % {
$l = #($_.Name -split ",") + # then split to restore
#($_.Group.value.x, $_.Group.value.y)
"[$l]"
}
Yes, the "Name" property of GroupInfo is always a string.
The easiest way to find the distinct values is to sample the first item in each group:
$a |Group-Object -Property {$_[0]},{$_[1]} |ForEach-Object {
$Group = $_.Group
# The first item in each group
$SampleItem = $Group | Select-Object -First 1
# Now we can inspect the key values, $SampleItem[0] and $SampleItem[1]
Write-Host ('This group has {0} and {1} as primary keys:' -f $SampleItem[0..1]) -ForegroundColor Green
$Group |ForEach-Object {
# echo each array in group
Write-Host ($_ -join ' ')
}
}