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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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6
Task/Strip-comments-from-a-string/Tcl/strip-comments-from-a-string-1.tcl Normal file
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proc stripLineComments {inputString {commentChars ";#"}} {
# Switch the RE engine into line-respecting mode instead of the default whole-string mode
regsub -all -line "\[$commentChars\].*$" $inputString "" commentStripped
# Now strip the whitespace
regsub -all -line {^[ \t\r]*(.*\S)?[ \t\r]*$} $commentStripped {\1}
}

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Task/Strip-comments-from-a-string/Tcl/strip-comments-from-a-string-2.tcl Normal file
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# Multi-line string constant
set input "apples, pears # and bananas
apples, pears ; and bananas"
# Do the stripping
puts [stripLineComments $input]

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Task/Strip-comments-from-a-string/Tcl/strip-comments-from-a-string-3.tcl Normal file
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proc stripLineComments {inputString {commentChars ";#"}} {
# Convert the character set into a transformation
foreach c [split $commentChars ""] {lappend map $c "\uFFFF"}; # *very* rare character!
# Apply transformation and then use a simpler constant RE to strip
regsub -all -line {\uFFFF.*$} [string map $map $inputString] "" commentStripped
# Now strip the whitespace
regsub -all -line {^[ \t\r]*(.*\S)?[ \t\r]*$} $commentStripped {\1}
}