I want to read a file line by line in PowerShell. Specifically, I want to loop through the file, store each line in a variable in the loop, and do some processing on the line.
I know the Bash equivalent:
while read line do
if [[ $line =~ $regex ]]; then
# work here
fi
done < file.txt
Not much documentation on PowerShell loops.
ベストアンサー1
Not much documentation on PowerShell loops.
Documentation on loops in PowerShell is plentiful, and you might want to check out the following help topics: about_For, about_ForEach, about_Do, about_While.
foreach($line in Get-Content .\file.txt) {
if($line -match $regex){
# Work here
}
}
Another idiomatic PowerShell solution to your problem is to pipe the lines of the text file to the ForEach-Object cmdlet:
Get-Content .\file.txt | ForEach-Object {
if($_ -match $regex){
# Work here
}
}
Instead of regex matching inside the loop, you could pipe the lines through Where-Object興味のあるものだけをフィルタリングするには:
Get-Content .\file.txt | Where-Object {$_ -match $regex} | ForEach-Object {
# Work here
}