Powershell-如何用双引号将数组对象中的特定行括起来？

Question

Lets say I have a text file whose content is this:

======= Section 1 ==========
This is line one
This is line two
This is line three
======= Section 2 ==========
This is line Four
This is line Five
This is line Six

I import it into Powershell using $SourceFile = Get-Content '.\source.txt' -Delimiter '===' then clean it up with $Objects = $SourceFile -replace '^=.*', '' I now have this $Objects array that has:

This is line one
This is line two
This is line three

and

This is line Four
This is line Five
This is line Six

What I really want to know is how can I wrap a specific line in double quotes or parenthesis etc, so that specific line in all the objects arrays are also handled the same way.

For example line 3 of both arrays should have double quotes wrapped around them:

This is line one
This is line two
"This is line three"

and

This is line Four
This is line Five
"This is line Six"

I have tried many things, closest I got was $test = $objects -replace 'This is line three', '"This is line three"' As you can see this is less than ideal for an object of many arrays.

I am still fairly new to Powershell, any help would be greatly appreciated

Answer 1

Assuming that you want to wrap the 3rd line in each block in double quotes:

# Read the input file and split it into blocks of lines by a
# regex matching the section lines (without including the section lines).
(Get-Content -Raw file.txt) -split '(?m)^===.*\r?\n' -ne '' |
  ForEach-Object {  # Process each block of lines (multi-line string)
    # Split this block into individual lines, ignoring a trailing newline.
    $linesInBlock = $_ -replace '\r?\n\z' -split '\r?\n' 
    # Modify the 3rd line.
    $linesInBlock[2] = '"{0}"' -f $linesInBlock[2]
    # Output the lines, including the modification.
    Write-Verbose -Verbose "-- next block"
    $linesInBlock
  }

Output with your sample input:

VERBOSE: -- next block
This is line one
This is line two
"This is line three"
VERBOSE: -- next block
This is line Four
This is line Five
"This is line Six"