regex code

Javascript getparams

similar to JavaScript GetVars Array and Parse GetVars with JavaScript this fetches all the get variables with corresponding values.

function getparams(s){
  a = s.match(/[^&?=]*=[^&?=]*/g);
  r = new Array();
  for (i=0; i<a.length; i++) {
  	r[i] = new Array(a[i].match(/[^&?=]*/)[0], a[i].match(/=([^&?]*)/)[0].replace('=', ''));
  }
  return(r);
}

to javascript regex string by featurelover on Oct 20, 2007 1 Comments

JavaScript GetVars Array

Figure out which Get-Vars are defined using client side javascript regex:

function getvars(s){
// php preg_match would be as easy as: (/([^&?=])=[^&?=]/g)
  a = s.match(/[^&?=]*=[^&?=]*/g);
  r = new Array();
  for (i=0; i<a.length; i++) {
  	r[i] = a[i].match(/[^&?=]*/)[0];
  }
  return(r);
}
/* test */
alert(getvars(window.location.search));

to javascript regex string by featurelover on Oct 20, 2007

There are many examples of how to parse get vars client side around, but most of them are using arrays and take much more lines of code and ram then nescesary. This one gives an elegant way to get values of given get parameters:

/* javascript */
String.prototype.get = function(p){
  return(this.match(new RegExp("[?|&]?" + p + "=([^&]*)"))[1]);
}

/* test: yourfile.html?test=test234 alerts: test234 */
alert(window.location.search.get('test'));

to javascript regex string by featurelover on Oct 20, 2007 3 Comments

Rails Regex: Convert spaces to dashes

s.gsub!(/\ +/, '-')

to rails regex by sikelianos on Sep 28, 2007

Rails Regex: Remove all non-word characters from a string

s.gsub!(/\W+/, '')

to rails regex by sikelianos on Sep 28, 2007

Rails Regex Lookaround

(Snagged from http://www.pivotalblabs.com/articles/2007/09/11/string-split-and-regex-lookarounds)

Ruby supports regular expression quite well, so it's not surprising that one can use a lookaround to match a specific position. That also works really well with String#split, so if one needs to extract the key/value out of a string such as this:

s = "TYPE=Exterior RED=119 GREEN=105 BLUE=88 TABLEREQ=PNTTBL-01 TABLE=Primary w/XL GENERICCLR=Beige GENERICCLRCODE=31"
s.split(/\s(?=[A-Z]*=)/)

Just splitting on "space" won't work because there are spaces inside the values, too ("Primary w/XML"). Simple and useful...

to rails regex by sikelianos on Sep 11, 2007

CSV parsing regex

The regular expression is taken from Raimond Brookman, Regex fun with CSV.
For a good general CSV overview see The Comma Separated Value (CSV) File Format.
A complete Ruby CSV parsing library is FasterCSV (sudo gem install fastercsv).


csv_data = <<-EOS

fname,lname,age,salary
nancy,davolio,33,$30000
erin,borakova,28,$25250
tony,raphael,35,$28700

"Date","Pupil","Grade"
"25 May","Bloggs, Fred","C"
"25 May","Doe, Jane","B"
"15 July","Bloggs, Fred","D"

123456789,"Carr, Lisa",100000.00
444556666,"Barr, Clark",87000.00
777227878,"Parr, Jack",123000.00
998877665,"Charr, Lee",123000.00

Conference room 1, "John,  
Please bring the M. Mathers file for review  
-J.L.
"
10/18/2002,...

John,Doe,120 jefferson st.,Riverside, NJ, 08075
Jack,McGinnis,220 hobo Av.,Phila, PA,09119
"John ""Da Man""",Repici,120 Jefferson St.,Riverside, NJ,08075
Stephen,Tyler,"7452 Terrace ""At the Plaza"" road",SomeTown,SD, 91234
,Blankman,,SomeTown, SD, 00298
"Joan ""the bone"", Anne",Jet,"9th, at Terrace plc",Desert City,CO,00123

XXXX,D,3-May-02,83.01,83.58,71.13,78.04,9645300
XXXX,D,2-May-02,82.47,85.76,82.05,83.84,7210000,
XXXX,D,1-May-02,86.80,90.83,81.74,85.50,14253300

"1997",car model,E350
1997,car model,E350,"  Super luxurious truck    "
1997,car model,E350,"Go get one now
they are going fast"
1997,car model,E350,"Super ""luxurious"" truck"
1997,car model,E350,"Super, luxurious truck"

1997,car model,E350,"ac, abs, moon",3000.00
1999, car model,"Venture ""Extended Edition""",,4900.00,
1996, car model,Old Car,"BEYOND REPAIR!
air, moon roof, loaded",4799.00

This,is,a test,CSV, file," from ""http://lorance.freeshell.org/csv/test.csv""."
It contains,"quoted text",and,numbers 1234,5678
It also has,"quoted text with an embedded quote""<- right there"
Then there are a few,,blank fields like these here ->,,,
A quoted blank field,"",<- there.
A quoted blank field with newline,"\n",<- there.
This next one causes an error if newline handling is turned off.
"There is a newline here ->
<- and it should be processed correctly."
ABCD
"And here,,, is an""Error - no"
"And here,,, is an"Error - yes
"And here,,, is an",Error - no

1,2,3
ab,"c,d","e""f", "g"",""","h
jk",kl

"aaa","bbb","ccc"
zzz,yyy,xxx
"aaa","b
bb","ccc"
zzz,yyy,xxx

"aaa","b""bb","ccc"

EOS



csv_data.split(/(,|\r\n|\n|\r)(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))/m).each do |csv|
#csv_data.split(/[,\n\r]+(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))/m).each do |csv|

   next if csv.empty?

   csv = csv.strip

   if csv =~ /\A(".*[^"]|[^"].*")\z/m then     # examples: csv => "ab\nc"def  or  abc"de\nf"
       puts
       puts "Error:" 
       p csv 
       puts csv[/\A./mu], csv[/.\z/mu] 
       #puts csv[0..0], csv[-1..-1] 
       puts
       next
   end

   if csv =~ /\A".*"\z/m then csv.gsub!(/\A"(.*)"\z/m, '\1') end  # remove double-quotes at string beginning & end
   if csv =~ /""/m then csv.gsub!(/""/m, '"') end                 # remove a double-quote from double double-quotes

   p csv

end

to ruby regex parser parse comma csv by ntk on Aug 18, 2007

Java: RegEx: Splitting a space-, comma-, and semi-colon separated list

// Greedy RegEx quantifier used
// X+ = X, one or more times
// [\\s,;]+ = one or more times of either \s , or ;

    String test_data = "hello world, this is a test, ;again";
    _logger.debug("Source: " + test_data);
    
    for (String tag : test_data.split("[\\s,;]+"))
    {
      _logger.debug("Received tag: [" + tag + "]");
    }

to regex java string manipulation by thitiv on Aug 05, 2007

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(/<\/?[^>]*>/, "")

to ruby regex by sikelianos on Jul 18, 2007 1 Comments

Ruby: Count number of words in a string

class String
  def count_words
    n = 0
    scan(/\b\S+\b/) { n += 1}
    n
  end 
end