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< title > Remplacer tout sauf une partie< / title >
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< a href = "/Scratch/en/blog/2009-09-replace-all-except-some-part/" onclick = "setLanguage('en')" > in English< / a >
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Remplacer tout sauf une partie
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< p > My problem is simple:< / p >
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< p > I want to filter a text except some part of it. I can match easily the part I don’ t want to be filtered. For example< / p >
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< pre > < code class = "html" > ...
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text
...
BEGIN not to filter
...
text
...
END not to filter
...
text
...
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< / code > < / pre >
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< p > I searched a better way to do that, but the best I can do is using < code > split< / code > and < code > scan< / code > .< / p >
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< pre > < code class = "ruby" > def allExceptCode( f, content )
# Beware the behaviour will change if you add
# parenthesis (groups) to the regexp!
regexp=/< code[^> ]*> .*?< \/code> |< pre[^> ]*> .*?< \/pre> /m
tmp=""
mem=[]
content.scan(regexp).each do |c|
mem < < = c
end
i=0
content.split(regexp).each do |x|
tmp < < = send(f,x)
if not mem[i].nil?
tmp < < = mem[i]
i+=1
end
end
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tmp
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end
< / code > < / pre >
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< p > An usage is:< / p >
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< pre > < code class = "ruby" > def filter(content)
content.gsub(/e/,'X')
end
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...
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allExceptCode(:filter, content)
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...
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< / code > < / pre >
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< p > A better syntax would be:< / p >
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< pre > < code class = "ruby" > # !!!!!!!!!! THIS SYNTAX DOES NOT WORK !!!!!!! #
def allExceptCode( f, content )
regexp=/< code[^> ]*> .*?< \/code> /m
tmp=""
content.split(regexp).each do |x|
separator=$&
tmp < < = send(f,x)
if not separator.nil?
tmp < < = separator
end
end
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tmp
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end
< / code > < / pre >
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< p > I would expect the split make a search on a regular expression and then give the matched expression into the < code > $& < / code > variable. But it is not the case.< / p >
< p > If someone know a nicer way to do that I will be happy to know how.< / p >
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Écrit le : 22/09/2009
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modifié le : 11/01/2012
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