Multi-line replace with string, not regexp
in [JavaScript]
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From: SAM on 9 Aug 2010 09:42 Le 08/08/10 17:46, Brett a �crit : > I'm working on a project where a paragraph of text may contain markup > such as: > > [Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: Essential > Intermediate Programming") > > I want to replace any instance of the above markup with an HTML link. > E.g. the link text is "Dewhurst" and clicking it produces an alert > with the full citation. > > I've already written code to find each markupLink and convert it to > the desired HTML. The problem I have is putting it back into the > paragraph. > > Suppose I've converted > linkMarkup = '[Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: > Essential Intermediate Programming")' linkMarkup = '[Dewhurst](Dewhurst, Stephen, C. \"C++ Common Knowledge:\nEssential Intermediate Programming\")'; or maybe : linkMarkup = /\[Dewhurst]\(Dewhurst, Stephen, C. \"C\+\+ Common Knowledge:[\n\r]*Essential Intermediate Programming\")/; (both in one line, and linkHtml too) into : linkHtml = '<a href="javascript:alert(\'(Dewhurst, Stephen, C. \\"C++ Common Knowledge: Essential Intermediate Programming\\")\')">Dewhurst</a>'; > into > linkHtml = "<a href=\"javascript:alert('Dewhurst, Stephen, C. \"C++ > Common Knowledge: Essential Intermediate Programming\"');\">Dewhurst</ > a>" > > I want to do a multi-line replace, replacing linkMarkup with > linkHtml. I think that is only possible with a "real" regexp (that will search all characters between 2 tags (or marker) ) linkMarkup = /\[Dewhurst][^_]*\[\/Dewhurst]/; > txt.replace(new RegExp(linkMarkup,'m'), linkHtml) doesn't work because > linkMarkup isn't a regexp pattern, it's just a string. Characters such > as the '++' in C++ need to be escaped. txt.replace(/\[Dewhurst][^_]*\[\/Dewhurst]/g, linkHtml); I think that is not the + the problem I think it's the line return that causes troubles and, perhaps too, the " and ' and ( in replacing string > Is there a way to convert a plain string into a regexp patter which > matches the plain string? the "plain" string must be first a "string" (in JS understanding) -- sm
From: Ry Nohryb on 9 Aug 2010 09:55 On Aug 9, 3:42 pm, SAM <stephanemoriaux.NoAd...(a)wanadoo.fr.invalid> wrote: > Le 08/08/10 17:46, Brett a écrit : > > > > > > > > > > > I'm working on a project where a paragraph of text may contain markup > > such as: > > > [Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: Essential > > Intermediate Programming") > > > I want to replace any instance of the above markup with an HTML link. > > E.g. the link text is "Dewhurst" and clicking it produces an alert > > with the full citation. > > > I've already written code to find each markupLink and convert it to > > the desired HTML. The problem I have is putting it back into the > > paragraph. > > > Suppose I've converted > > linkMarkup = '[Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: > > Essential Intermediate Programming")' > > linkMarkup = '[Dewhurst](Dewhurst, Stephen, C. \"C++ Common > Knowledge:\nEssential Intermediate Programming\")'; > > or maybe : > > linkMarkup = /\[Dewhurst]\(Dewhurst, Stephen, C. \"C\+\+ Common > Knowledge:[\n\r]*Essential Intermediate Programming\")/; > > (both in one line, and linkHtml too) > > into : > > linkHtml = '<a href="javascript:alert(\'(Dewhurst, Stephen, C. \\"C++ > Common Knowledge: Essential Intermediate Programming\\")\')">Dewhurst</a>'; > > > into > > linkHtml = "<a href=\"javascript:alert('Dewhurst, Stephen, C. \"C++ > > Common Knowledge: Essential Intermediate Programming\"');\">Dewhurst</ > > a>" > > > I want to do a multi-line replace, replacing linkMarkup with > > linkHtml. > > I think that is only possible with a "real" regexp (that will search all > characters between 2 tags (or marker) ) > > linkMarkup = /\[Dewhurst][^_]*\[\/Dewhurst]/; > > > txt.replace(new RegExp(linkMarkup,'m'), linkHtml) doesn't work because > > linkMarkup isn't a regexp pattern, it's just a string. Characters such > > as the '++' in C++ need to be escaped. > > txt.replace(/\[Dewhurst][^_]*\[\/Dewhurst]/g, linkHtml); > > I think that is not the + the problem > I think it's the line return that causes troubles > and, perhaps too, the " and ' and ( in replacing string > > > Is there a way to convert a plain string into a regexp patter which > > matches the plain string? > > the "plain" string must be first a "string" (in JS understanding) But I wonder, why the hassle when you can do it by looping an ordinary replace ? Is it because regexps are sooo cool that one should use them amap even when/if they're not the right/more convenient tool for the task at hand ? :-) -- Jorge.
From: SAM on 9 Aug 2010 10:30 Le 09/08/10 14:49, Ry Nohryb a �crit : > txt= 'some text plus [Dewhurst](Dewhurst, Stephen, C. "C++ Common > Knowledge: Essential Intermediate Programming") plus some more text > plus again [Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: > Essential Intermediate Programming") plus even more text'; And what about (what I think OP wanted) : txt= 'some text plus [Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: '+ '\n\r' + 'Essential Intermediate Programming") plus some more textplus again [Dewhurst](Dewhurst, Stephen, C. "C++ Common Knowledge: Essential Intermediate Programming") plus even more text'; ??? -- sm
From: SAM on 9 Aug 2010 10:34 Le 09/08/10 15:55, Ry Nohryb a �crit : > But I wonder, why the hassle when you can do it by looping an ordinary > replace ? You're talking about a text-editor ? Yes a text-editor by copy/past can search a multi-lines text (and then replace it) > Is it because regexps are sooo cool that one should use them > amap even when/if they're not the right/more convenient tool for the > task at hand ? It's not the fault to RegExp if JS breaks on a line return (text-editor's line return in a JS string) Even in my text-editor I use RegExp for multi-replacements, it's really too cool ;-) search : art: (\d+) replace all : article: \1 - ref: shop-\1 In JS : texto.replace(/art: (\d+)/g,'article: $1 - ref: shop-$1'); -- sm
From: Ry Nohryb on 9 Aug 2010 10:48
On Aug 9, 4:34 pm, SAM <stephanemoriaux.NoAd...(a)wanadoo.fr.invalid> wrote: > Le 09/08/10 15:55, Ry Nohryb a écrit : > > > But I wonder, why the hassle when you can do it by looping an ordinary > > replace ? > > You're talking about a text-editor ? > Yes a text-editor by copy/past can search a multi-lines text > (and then replace it) > > > Is it because regexps are sooo cool that one should use them > > amap even when/if they're not the right/more convenient tool for the > > task at hand ? > > It's not the fault to RegExp if JS breaks on a line return > (text-editor's line return in a JS string) > > Even in my text-editor I use RegExp for multi-replacements, > it's really too cool ;-) > > search : > art: (\d+) > replace all : > article: \1 - ref: shop-\1 > > In JS : > texto.replace(/art: (\d+)/g,'article: $1 - ref: shop-$1'); But in this case, the OP has a string that must be escaped if it's to be used as a regexp for the search, therefore, I'd say, well, then don't use it as a regexp, just loop using a regular search (not a //g regexp) until done. BTW that's because I'm guessing that when he says multiline he really means he wants to replace multiple instances, that is, a //g regexp, which is no more than ~ a simple loop. -- Jorge. |