Category: Pwsh7+

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Experiment Power BI Pwsh7+

Errors of 2023-01

Power BI

You can’t create a new table with the same name as an existing
query or item in the model.

The “New Table” button creates a new table named “Table”

This means if you create a query named “Table”, the UI cannot
create any new tables. It’s before the rename step.

I discovered this also includes the names of disable queries.
At first I thought It was a cache—issue, but it’s not.

This is actually a good “bug”.
Which is better than if the opposite was true — letting you
create tables and expressions with ambiguous identifiers.

AI using PowerShellAI

Powershell /w the module PowerShellAI
# the original version that didn't parse 
# because ',' made number endings ambiguous
'1,000,2,000,3,000,0,000,1,000,2,000,3,000,0,000' -split '\,'
| Join-String -sep ' ' -SingleQuote
| Label 'original' -Before 1

'1000', '2000', '3000', '0', '1000', '2000', '3000'
| Join-String -sep ' ' { '{0:n0}' -f @( $_ -as 'int' ) } -SingleQuote
| Label 'should be' -Before 1 -After 1
 

$result ??= @{}
( $result.Steps1 ??= ai '# first 100 numbers modulous 4, multiplied by a factor of 1e6' )
| renderNice | Label 'Step1' -bef 1
hr
label 'step3' -after 1 'This time it''s parsable, but, the numbers are not the same different.'
$result.Steps3 -split ',' -replace "'", '' | renderNice
Categories
Experiment PowerShell Pwsh7+

Experiments of 2022-04

FdFind, Ansi Colors with Group-Object 

# [3] main + UX for long exxtensions + Horizontal rules
fd --color=always --changed-within=10hours
| group { 
    $strExt = $_ | StripAnsi | gi | % Extension
    # QOL: don't let massive names break the table
    if($strExt.Length -gt 10) { $strExt.Substring(0, 10) } else {$strExt}
}
| %{ $_ ; hr }
| ft -AutoSize
# [1] Minimum required
fd --color=always --changed-within=10hours
| group { $_ | StripAnsi | gi | % Extension }
| ft -AutoSize
# [2] UX: Don't let super long extensions break break columns
fd --color=always --changed-within=10hours
| group {
    $strExt = $_ | StripAnsi | gi | % Extension
    if($strExt.Length -gt 10) { $strExt.Substring(0, 10) } else {$strExt}
}
| ft -AutoSize

Using wt‘s Parameters

https://github.com/Ninmonkey.Console/WtThemeTest
PS> ZD-Invoke-WtThemeTest -Random
PS> wt -w theme-test new-tab --title "Tango Light" --profile 'pwsh_nop' --colorScheme "Tango Dark"
PS> wt -w theme-test new-tab --title "Tango Light" --profile 'pwsh_nop' --colorScheme "BirdsOfParadise"

# or
ZD-Invoke-WtThemeTest -Random

Nested Formatting in Powershell

Using module Pansies
What not to do 🙂

CLI bat to preview results

# For every file fd finds, print the first 15 lines
PS> fd --exec-batch bat --line-range=:15 --paging=always

# forcing paging /on/off
PS> fd --exec-batch bat --line-range=:15 --paging=never

Regex Lazy vs Greedy Expressions

Using CSS Selectors

selector 'div.premium-box span.btn.btn-info'

Autocomplete changes based on the first Argument

Parsing Stdout Whitespace

Grouping On Errors

Type Resolution Is Scoped 

Pwsh🐒> # test whether it's resolved by coerce to [type]
    'catman' -as 'type' -is 'type'
    'batman' -as 'type' -is 'type'
True
False
Pwsh🐒> # test whether it's resolved by coerce to [type]
    'catman' -as 'type' -is 'type'
    'batman' -as 'type' -is 'type'
True
False


# after 

Pwsh🐒> @(
    # Declaring a new type in inside a [ScriptBlock]
    & {
        class batman { [string]$Name }
        [batman]
    }

    # verses dotsourcing a type into the current scope
    . {
       class catman { [string]$Name }
       [catman]
    }) | ft -AutoSize

   Namespace: <4cf9efd5>

Access Modifiers Name   BaseType
------ --------- ----   --------
public class     batman object

   Namespace: <f2200555>

Access Modifiers Name   BaseType
------ --------- ----   --------
public class     catman object
Categories
Command Line Getting-Started PowerShell Pwsh7+ Quick Tips What's New

PowerShell : Prefixing lines with the Pipe operator |

There’s a lot of ways to use line continuations in Windows Powershell without backticks . Powershell added a new one, the | pipe operator. It’s cleaner to read, and makes it easier to insert, delete, or toggle comments on the console.

Now you can write:

# Powershell
ls | sort Length
| Select -First 10
| ft Name, Length

Instead of piping on line endings

# Windows Powershell
ls | sort Length |
Select -First 10 |
ft Name, Length

# or
ls | sort Length | Select -First 10 | ft Name, Length