Ruby: Strip html tags from a string
str = "<html>This and <b>that</b> and <br />and <span class='something'>the other</span>?<html>" puts str.gsub(/<\/?[^>]*>/, "")
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Ruby: Count number of words in a string
class String def count_words n = 0 scan(/\b\S+\b/) { n += 1} n end end
Match an html attribute
The goal of this expression is to match all "id" attributes of the "div" tags on a page
<div(?=\s) (?: (?!\sid=|>) . )* # Consume everything until finding " id=" or ">" # (">" is just for failing faster) \sdiv=(?P<__quote>['"])? # Consume " div=" and save the quote type (' or ") if any (?: # while (?! # next character isn't, (?(__quote) # if a quote has been opened, (?P=__quote) # the closing quote ; |[\s>] # a space or ">" else, ) ) . # consume this character )* (?(__quote) # If we got a quote (?P=__quote)| # it must be closed (?=[\s>]) # else, the attribute is ended by a space or ">" ) [^>]*> # Consume the rest of the tag
Testing for Exception message in Rails
e = assert_raise(RuntimeError) { my_code_that_raises } assert_match(/Error message here/i, e.message)..
Variable-length negation
Everybody known the
construction to match a tag. But how to match inside a tag ? We want something like:
but it don't work since [^div] has not this meaning ;)
This regexp do that (but don't manage nested markups, however).
<div[^>]*>
construction to match a tag. But how to match inside a tag ? We want something like:
<div>[^div]*</div>
but it don't work since [^div] has not this meaning ;)
This regexp do that (but don't manage nested markups, however).
<div> (?: (?!</div>) # If not followed by </div> . # Match any character )* # Non-capturing grouping </div>
Netiquette: wrap lines
Netiquette say that your lines must not be longer that 80 letters. This regexp limit the size of a line at 80 letters without splitting a word
For example,
N'y a t-il pas quelque chose d'un peu grotesque dans le spectacle d'êtres humains tenant un miroir devant eux, et trouvant ce qu'ils y voient assez parfait pour démontrer qu'un Dessein Cosmique y tendait dès l'origine?
Will be transformed in:
N'y a t-il pas quelque chose d'un peu grotesque dans le spectacle d'êtres
humains tenant un miroir devant eux, et trouvant ce qu'ils y voient assez
parfait pour démontrer qu'un Dessein Cosmique y tendait dès l'origine?
For example,
N'y a t-il pas quelque chose d'un peu grotesque dans le spectacle d'êtres humains tenant un miroir devant eux, et trouvant ce qu'ils y voient assez parfait pour démontrer qu'un Dessein Cosmique y tendait dès l'origine?
Will be transformed in:
N'y a t-il pas quelque chose d'un peu grotesque dans le spectacle d'êtres
humains tenant un miroir devant eux, et trouvant ce qu'ils y voient assez
parfait pour démontrer qu'un Dessein Cosmique y tendait dès l'origine?
s/([^\n]{0,80})\s/$1\n/mg
email validation regex
/^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/
Regular expression to match MySQL's DATETIME type
Matches MySQL built-in datetime type, for example, 2007-06-05 15:26:02
It also matches date type, i.e. 2007-06-05
It also matches date type, i.e. 2007-06-05
/^([0-9]{2,4})-([0-1][0-9])-([0-3][0-9]) (?:([0-2][0-9]):([0-5][0-9]):([0-5][0-9]))?$/
Java: RegEx to Remove HTML Tags
// Ref: https://jalbum.net/forum/thread.jspa?forumID=7&threadID=971&messageID=6907
String noHTMLString = htmlString.replaceAll("\\<.*?\\>", "");
URL Regex
// description of your code here
A regular expression pattern that validates a URL string, either HTTP or HTTPS.
You can easily use it with validates_format_of in your Model...
For example, In a comment model, to check the :SiteURL on the comment creation:
A regular expression pattern that validates a URL string, either HTTP or HTTPS.
/^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$/ix
You can easily use it with validates_format_of in your Model...
For example, In a comment model, to check the :SiteURL on the comment creation:
class Comment < ActiveRecord::Base validates_format_of :SiteURL, :with => /^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$/ix, :on => :create end
