regexp code

Extract the filename from a URL

This ECMAScript extracts the filename from a URL. eg. the filename 'index4.svg' would be extracted from the document.URL with the value 'http://rorbuilder.info/r/whiteboardqueue/index4.svg'.

var regexp = /(\w|[-.])+$/
str = document.URL
a = regexp.exec(str)
alert(a[0])

Reference: Regular Expressions: Methods - Doc JavaScript [webreference.com]

to regular url regexp expression document ecmascript by jrobertson on Apr 20, 2008

Some perl one-liners

Rename htm files to html
In windows:

>dir /B /S | perl -wlne"/([^ ]+)\.htm$/i&&rename$1.'.htm',$1.'.html'"

In linux:

>find | grep htm | perl -wlne'/([^ ]+)\.htm$/i&&rename$1.".htm",$1.".html"'

to perl regexp one-liners by griflet on Jun 10, 2007

Check for primality with a regexp

Original perl code here:

http://montreal.pm.org/tech/neil_kandalgaonkar.shtml

class Fixnum
  def prime?
    ('1' * self) !~ /^1?$|^(11+?)\1+$/
  end
end

to ruby regexp primality by ciconia on Mar 18, 2007 1 Comments

Create an regexp (Regular expression) from an array of Strings

// description of your code here
Create a DNF regular expression from an array of strings even if they have special characters.

Regexp.new(array.collect{|string| Regexp.escape(string)}.join("|"))

to string array regexp dnf by eddiewould on Dec 19, 2006 1 Comments

Simple regexp in python working on a string of names and e-mail adresses

#!/usr/bin/env python

import re
import sys

mySplit = re.compile (r',', flags=re.MULTILINE)
mailadress = re.compile (r'\<.\D*.\D+@\D+.[.]\D+.\>', flags=re.MULTILINE)

for i in mySplit.split ("Weng Feng <weng.feng@telia.se>, Erik Andersson <kirean@gmail.com>, Ake Kong <kong@\
goek.se>"):
    k = mailadress.search(i.strip())
    if k:
        print k.group().lstrip("<").rstrip(">")

to python regexp e-mailadress by kirean73 on Dec 01, 2006

Split String into roughly equal-sized chunks.

Split a string into an array of roughly equal sized chunks based on a string or regular expression delimiter.
Delimiter is preserved in output.

class String
  def chunk_string(average_segment_size = 40, sclice_on = /\s+/)
    out = []
    slices_estimate = self.size.divmod(average_segment_size)
    slice_count = (slices_estimate[1] > 0 ? slices_estimate[0] + 1 : slices_estimate[0])
    slice_guess = self.size / slice_count
    previous_slice_location = 0
    (1..slice_count - 1).each do
      |i|
      slice_location = self.nearest_split(slice_guess * i, sclice_on)
      out << self.slice(previous_slice_location..slice_location)
      previous_slice_location = slice_location + 1
    end
    out << self.slice(previous_slice_location..self.size)
    out
  end

  def nearest_split(slice_start, slice_on)
    left_scan_location  = (self.slice(0..slice_start).rindex(slice_on)).to_i
    right_scan_location = (self.slice((slice_start+1)..self.size).index(slice_on)).to_i + slice_start
    ((slice_start - left_scan_location) < (right_scan_location - slice_start) ? left_scan_location : right_scan_location)
  end
end

to ruby string size regexp split chunk slice regular expression average by duncanbeevers on Sep 20, 2006

Return the extension from a file name

// Return the extension from a file name

/(.*\.)(.*$)/.match(File.basename(file_name))[2]

to ruby regex regexp file filename extension regular expression by duncanbeevers on Sep 06, 2006 1 Comments

Make anchors from urls and email addresses

This little PHP function will find urls and email addresses in a block of text and turn them into hyperlinks and mailto: anchors respectively.

function makeLinks($sourceText) {
  $destText = preg_replace( "/([_a-zA-Z0-9-]+)(\.[_a-zA-Z0-9-]+)*@([a-zA-Z0-9-]+)(\.[a-zA-Z0-9-]+)*(\.[a-zA-Z]{2,4})/", '<a href="mailto:\\0">\\0</a>',$sourceText);
  $destText = preg_replace_callback('/\bhttp[^\s]+/',create_function('$matches', 'return "<a href=\"$matches[0]\">" . preg_replace("#(\.|/)#", "&shy;$1", $matches[0]) . "</a>";'),$destText);
  return $destText;
}

to urls php email regexp addresses by hjalli on Aug 31, 2005

validate a url (regexp)

function isUrl(s) {
	var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	return regexp.test(s);
}

usage: if (isUrl("http://www.page.com")) alert("is correct")
else alert("not correct");

to javascript regexp by rafaeltds on Jul 04, 2005

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