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  • How to detect Links with out anchor element in a plain text

    - by dhee
    If user enters his text in the text box and saves it and again what's to add some more text he can edit that text and save it if required. Firstly if user enters that text with some links I, detected them and converted any hyperlinks to linkify in new tab. Secondly if user wants to add some more text and links he clicks on edit and add them and save it at this time I must ignore the links that already hyperlinked with anchor button Please help and advice For example: what = "<span>In the task system, is there a way to automatically have any site / page URL or image URL be hyperlinked in a new window?</span><br><br><span>So If I type or copy http://www.stackoverflow.com/&nbsp; for example anywhere in the description, in any of the internal messages or messages to clients, it automatically is a hyperlink in a new window.</span><br><a href="http://www.stackoverflow.com/">http://www.stackoverflow.com/</a><br> <br><span>Or if I input an image URL anywhere in support description, internal messages or messages to cleints, it automatically is a hyperlink in a new window:</span><br> <span>https://static.doubleclick.net/viewad/4327673/1-728x90.jpg</span><br><br><a href="https://static.doubleclick.net/viewad/4327673/1-728x90.jpg">https://static.doubleclick.net/viewad/4327673/1-728x90.jpg</a><br><br><br><span>This would save us a lot time in task building, reviewing and creating messages.</span> Test URL's http://www.stackoverflow.com/ http://stackoverflow.com/ https://stackoverflow.com/ www.stackoverflow.com //stackoverflow.com/ <a href='http://stackoverflow.com/'>http://stackoverflow.com/</a>"; I've tried this code function Linkify(what) { str = what; out = ""; url = ""; i = 0; do { url = str.match(/((https?:\/\/)?([a-z\-]+\.)*[\-\w]+(\.[a-z]{2,4})+(\/[\w\_\-\?\=\&\.]*)*(?![a-z]))/i); if(url!=null) { // get href value href = url[0]; if(href.substr(0,7)!="http://") href = "http://"+href; // where the match occured where = str.indexOf(url[0]); // add it to the output out += str.substr(0,where); // link it out += '<a href="'+href+'" target="_blank">'+url[0]+'</a>'; // prepare str for next round str = str.substr((where+url[0].length)); } else { out += str; str = ""; } } while(str.length>0); return out; } Please help Thanks.

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  • Merging MP3 files in Linux Debian using PHP

    - by pako
    What's the easiest way to merge the contents of several MP3 files into one using PHP 5.2 on Linux Debian system? I found some scripts that are supposed to do in PHP only, but they seem to be buggy. Perhaps there is a way to accomplish this task using command line programs, that I could install on my Linux Debian machine?

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  • Finder plugin in 10.6

    - by Girish Kolari
    I want to color badge files and folders based on the some condition in finder, what is the approach to achieve this in Mac OS X 10.6 I have checked this question: This only talk about the context menu in finder http://stackoverflow.com/questions/1651075/finder-plugin-in-snow-leopard I have even checked: http://scplugin.tigris.org/ even they don't do color badging in 10.6 which is pending task. Thanks in advance for your all help

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  • Which web crawler to use to save news articles from a website into .txt files?

    - by brokencoding
    Hi, i am currently in dire need of news articles to test a LSI implementation (it's in a foreign language, so there isnt the usual packs of files ready to use). So i need a crawler that given a starting url, let's say http://news.bbc.co.uk/ follows all the contained links and saves their content into .txt files, if we could specify the format to be UTF8 i would be in heaven. I have 0 expertise in this area, so i beg you for some sugestions in which crawler to use for this task.

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  • R in a netbook - system requirements for using R

    - by Brani
    I know it's not a programming question but I'm in a hurry to choose a netbook like this and I haven't been able to find the minimum system requirements for an R installation (e.g. minimum RAM). I am interested in a small netbook so as to be able to use it in class. Has anybody used R in a netbook that would recommend for that use?

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  • Basic regexp help

    - by casben79
    I am new to programming PHP and am trying to validate a field in a form. The field if for a RAL color code and so would look something like : RAL 1001. so the letters RAL and then 4 numbers. Can someone help me set them into a regular expression to validate them. i have tried this with no success: $string_exp = "/^[RAL][0-9 .-]+$/i"; What can I say but sorry for being a complete NOOB at PHP. Cheers Ben

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  • JSON limitation?

    - by thedp
    Hello, I would like to know if JSON with AJAX has a limitation to the amount of data an outgoing and returning parameter can carry? I would like to be able to send and return from the server a file with 10,000 lines, as a string. How should I achieve this task? Will a single parameter will be able to hand this? Thank you.

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  • How to create custom javadoc tags

    - by Carlucho
    How to create custom javadoc tags such as @pre / @post... I found some links that explain it but i haven had luck with them, i dont know if that am already tired but i can figure where to put it. these are some of the links http://www.developer.com/java/other/article.php/3085991/Javadoc-Programming.html http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/javadoc.html I'm sorry to ask to be spoon fed but am at the stage where i only see black dots on the screen :\ Thanks a bunch

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  • Further explanation of IntentService

    - by rayman
    Hi all, I was trying to get the purpose of the IntentService, and when should I use it? I tried to understand from the API, but not enough details on that one. Is there any analogy between this and running long-task on a working thread? Any further explanation and samples on why I would use IntentService would be very welcome. Thanks, ray.

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  • enCapsa -what is it and what is used for?

    - by agnieszka
    It may not be a pure programming question but I'm looking for information about enCapsa. Do you know what it is, have you ever used it? I'm reading some papers about it but I can't really see how it works and what it can be used for in an IT company (and this is what i am supposed to find out).

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  • How to assert on number of html table rows in ruby using capybara + cucumber

    - by Neil
    I am trying to get to grips with BDD web development in Ruby using cucumber + capybara and I am stuck at what should be an easy task - just to check the number of rows in a table. Something along the lines of: page.should have_xpath("//table[@id='myTable']") find("//table[@id='myTable']/tr").length.should = 3 But this doesn't work and I can't find a way to assert against the table length. Any ideas anyone (please be easy on me tho' I'm a ruby nooby) Thanks in advance Neil

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  • Paperclip: delete attachment and "can't convert nil into String" error

    - by snitko
    I'm using Paperclip and here's what I do in the model to delete attachments: def before_save self.avatar = nil if @delete_avatar == 1.to_s end Works fine unless @delete_avatar flag is set when the user is actually uploading the image (so the model receives both params[:user][:avatar] and params[:user][:delete_avatar]. This results in the following error: TypeError: can't convert nil into String from /Work/project/src/vendor/plugins/paperclip/lib/paperclip/storage.rb:40:in `dirname' from /Work/project/src/vendor/plugins/paperclip/lib/paperclip/storage.rb:40:in `flush_writes' from /Work/project/src/vendor/plugins/paperclip/lib/paperclip/storage.rb:38:in `each' from /Work/project/src/vendor/plugins/paperclip/lib/paperclip/storage.rb:38:in `flush_writes' from /Work/project/src/vendor/plugins/paperclip/lib/paperclip/attachment.rb:144:in `save' from /Work/project/src/vendor/plugins/paperclip/lib/paperclip/attachment.rb:162:in `destroy' from /Work/project/src/app/models/user.rb:72:in `before_save' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:347:in `send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:347:in `callback' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:249:in `create_or_update' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:2538:in `save_without_validation' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/validations.rb:1078:in `save_without_dirty' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/dirty.rb:79:in `save_without_transactions' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:229:in `send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:229:in `with_transaction_returning_status' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in `transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:182:in `transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:228:in `with_transaction_returning_status' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:196:in `save' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:208:in `rollback_active_record_state!' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:196:in `save' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:723:in `create' I assume it has something to do with the avatar.dirty? value because when it certainly is true when this happens. The question is, how do I totally reset the thing if there are changes to be saved and abort avatar upload when the flag is set?

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  • Override to_json in Rails 2.3.5

    - by smotchkkiss
    I've seen some other examples on SO, but I none do what I'm looking for. I'm trying: class User < ActiveRecord::Base def to_json super(:only => :username, :methods => [:foo, :bar]) end end I'm getting ArgumentError: wrong number of arguments (1 for 0). Any ideas?

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  • Do Brainbench certifications carry any weight with employers?

    - by Joshua Carmody
    Back in 2000, I got a bunch of programming certifications from Brainbench. However, they didn't seem to be doing me any good, and they needed to be renewed every year, so I let them lapse. Recently I've been hearing more about Brainbench, and I've been wondering - do these certifications impress potential employers at all, in 2009? What has been your experience?

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  • Dynamic Attachment Size for Paperclip (Rails)

    - by CalebHC
    Is there anyway to have the validates_attachment_size except a dynamic file size limit? Here's an example: class Document < ActiveRecord::Base belongs_to :folder has_attached_file :document validates_attachment_size :document, :less_than => get_current_file_size_limit private def get_current_file_size_limit 10.megabytes # This will dynamically change end end I've tried this but I keep getting an error saying "unknown method". Lambdas and Procs don't work either. Has anyone ever tried this? Thanks

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  • How to convert attribute name to string?

    - by Acidburn2k
    Lets say we have some basic AR model. class User < ActiveRecord::Base attr_accessible :firstname, :lastname, :email end ... some_helper_method(attrib) ... def Now I would like to pass someuser.firstname to helper and I would like to get both the value and the attribute name, for example: some_helper_method(someuser.firstname) > "firstname: Joe" some_helper_method(someuser.lastname) > "lastname: Doe"

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  • Why do I get a AssociationTypeMismatch when creating my model object?

    - by Maxm007
    Hi I get the following error: ActiveRecord::AssociationTypeMismatch in ContractsController#create ExchangeRate(#2183081860) expected, got HashWithIndifferentAccess(#2159586480) Params: {"commit"=>"Create", "authenticity_token"=>"g2/Vm2pTcDGk6uRas+aTgpiQiGDY8lsc3UoL8iE+7+E=", "contract"=>{"side"=>"BUY", "currency_id"=>"488525179", "amount"=>"1000", "user_id"=>"633107804", "exchange_rate"=>{"rate"=>"1.7"}}} My relevant model is : class Contract < ActiveRecord::Base belongs_to :currency belongs_to :user has_one :exchange_rate has_many :trades accepts_nested_attributes_for :exchange_rate end class ExchangeRate < ActiveRecord::Base belongs_to :denccy, :class_name=>"Currency" belongs_to :numccy, :class_name=>"Currency" belongs_to :contract end My view is: <% form_for @contract do |contractForm| %> Username: <%= contractForm.collection_select(:user_id, User.all, :id, :username) %> <br> B/S: <%= contractForm.select(:side,options_for_select([['BUY', 'BUY'], ['SELL', 'SELL']], 'BUY')) %> <br> Currency: <%= contractForm.collection_select(:currency_id, Currency.all, :id, :ccy) %> <br> <br> Amount: <%= contractForm.text_field :amount %> <br> <% contractForm.fields_for @contract.exchange_rate do |rateForm|%> Rate: <%= rateForm.text_field :rate %> <br> <% end %> <%= submit_tag :Create %> <% end %> My View Controller: class ContractsController < ApplicationController def new @contract = Contract.new @contract.build_exchange_rate respond_to do |format| format.html # new.html.erb format.xml { render :xml => @contract } end end def create @contract = Contract.new(params[:contract]) respond_to do |format| if @contract.save flash[:notice] = 'Contract was successfully created.' format.html { redirect_to(@contract) } format.xml { render :xml => @contract, :status => :created, :location => @contract } else format.html { render :action => "new" } format.xml { render :xml => @contract.errors, :status => :unprocessable_entity } end end end I'm not sure why it's not recognizing the exchange rate attributes? Thank you

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  • software and techniques for measuring programmer's productivity

    - by maya
    Hi everybody , measuring the software is essential part of software development. my task is to measure productivity of pair and solo programming . Is there any program help me to measure productivity of the software. and also I'm looking for techniques or steps for measuring productivity. anyone has information please help me . many thanks in advance

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  • Set Android Gallery widget to show specific starting image

    - by Dalmazio Brisinda
    Hi all, I have a task where the user can select an image from a GridView representing a photo album, and from this I start a new activity which displays a Gallery widget to show the images of the photo album. However, I can't seem to get the Gallery widget to show the contents of the photo album with a given image as the starting point. Ideally I would like a Gallery#setStartingImage(int position) or something similar. Any ideas would be greatly appreciated. Best, Dalmazio

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  • Regex with all optional parts but at least one required

    - by Alan Mendelevich
    I need to write a regex that matches strings like "abc", "ab", "ac", "bc", "a", "b", "c". Order is important and it shouldn't match multiple appearances of the same part. a?b?c? almost does the trick. Except it matches empty strings too. Is there any way to prevent it from matching empty strings or maybe a different way to write a regex for the task.

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  • Will these optimizations to my Ruby implementation of diff improve performance in a Rails app?

    - by grg-n-sox
    <tl;dr> In source version control diff patch generation, would it be worth it to use the optimizations listed at the very bottom of this writing (see <optimizations>) in my Ruby implementation of diff for making diff patches? </tl;dr> <introduction> I am programming something I have never done before and there might already be tools out there to do the exact thing I am programming but at this point I am having too much fun to care so I am still going to do it from scratch, even if there is a tool for this. So anyways, I am working on a Ruby on Rails app and need a certain feature. Basically I want each entry in a table of mine, let's say for example a table of video games, to have a stored chunk of text that represents a review or something of the sort for that table entry. However, I want this text to be both editable by any registered user and also keep track of different submissions in a version control system. The simplest solution I could think of is just implement a solution that keeps track of the text body and the diff patch history of different versions of the text body as objects in Ruby and then serialize it, preferably in human readable form (so I'll most likely use YAML for this) for editing if needed due to corruption by a software bug or a mistake is made by an admin doing some version editing. So at first I just tried to dive in head first into this feature to find that the problem of generating a diff patch is more difficult that I thought to do efficiently. So I did some research and came across some ideas. Some I have implemented already and some I have not. However, it all pretty much revolves around the longest common subsequence problem, as you would already know if you have already done anything with diff or diff-like features, and optimization the function that solves it. Currently I have it so it truncates the compared versions of the text body from the beginning and end until non-matching lines are found. Then it solves the problem using a comparison matrix, but instead of incrementing the value stored in a cell when it finds a matching line like in most longest common subsequence algorithms I have seen examples of, I increment when I have a non-matching line so as to calculate edit distance instead of longest common subsequence. Although as far as I can tell between the two approaches, they are essentially two sides of the same coin so either could be used to derive an answer. It then back-traces through the comparison matrix and notes when there was an incrementation and in which adjacent cell (West, Northwest, or North) to determine that line's diff entry and assumes all other lines to be unchanged. Normally I would leave it at that, but since this is going into a Rails environment and not just some stand-alone Ruby script, I started getting worried about needing to optimize at least enough so if a spammer that somehow knew how I implemented the version control system and knew my worst case scenario entry still wouldn't be able to hit the server that bad. After some searching and reading of research papers and articles through the internet, I've come across several that seem decent but all seem to have pros and cons and I am having a hard time deciding how well in this situation that the pros and cons balance out. So are the ones listed here worth it? I have listed them with known pros and cons. </introduction> <optimizations> Chop the compared sequences into multiple chucks of subsequences by splitting where lines are unchanged, and then truncating each section of unchanged lines at the beginning and end of each section. Then solve the edit distance of each subsequence. Pro: Changes the time increase as the changed area gets bigger from a quadratic increase to something more similar to a linear increase. Con: Figuring out where to split already seems like you have to solve edit distance except now you don't care how it is changed. Would be fine if this was solvable by a process closer to solving hamming distance but a single insertion would throw this off. Use a cryptographic hash function to both convert all sequence elements into integers and ensure uniqueness. Then solve the edit distance comparing the hash integers instead of the sequence elements themselves. Pro: The operation of comparing two integers is faster than the operation of comparing two strings, so a slight performance gain is received after every comparison, which can be a lot overall. Con: Using a cryptographic hash function takes time to convert all the sequence elements and may end up costing more time to do the conversion that you gain back from the integer comparisons. You could use the built in hash function for a string but that will not guarantee uniqueness. Use lazy evaluation to only calculate the three center-most diagonals of the comparison matrix and then only calculate additional diagonals as needed. And then also use this approach to possibly remove the need on some comparisons to compare all three adjacent cells as desribed here. Pro: Can turn an algorithm that always takes O(n * m) time and make it so only worst case scenario is that time, best case becomes practically linear, and average case is somewhere between the two. Con: It is an algorithm I've only seen implemented in functional programming languages and I am having a difficult time comprehending how to convert this into Ruby based on how it is described at the site linked to above. Make a C module and do the hard work at the native level in C and just make a Ruby wrapper for it so Ruby can make all the calls to it that it needs. Pro: I have to imagine that evaluating something like this in could be a LOT faster. Con: I have no idea how Rails handles apps with ruby code that has C extensions and it hurts the portability of the app. This is an optimization for after the solving of edit distance, but idea is to store additional combined diffs with the ones produced by each version to make a delta-tree data structure with the most recently made diff as the root node of the tree so getting to any version takes worst case time of O(log n) instead of O(n). Pro: Would make going back to an old version a lot faster. Con: It would mean every new commit, the delta-tree would get a new root node that will cost time to reorganize the delta-tree for an operation that will be carried out a lot more often than going back a version, not to mention the unlikelihood it will be an old version. </optimizations> So are these things worth the effort?

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  • Whitespace-Ingoring languages

    - by Sarc Asm
    People (here on SO) often talk about their dislike of languages which don't ignore whitespace. My question is: Which programming languages ignore whitespace? Examples: C++ co n st my Var with spaces = 1 23; - Error PHP $this willnot work = 456;

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