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  • benefit of having a factory for object creation?

    - by ajsie
    I'm trying to understand the factory design pattern. I don't understand why it's good to have a middleman between the client and the product (object that the client wants). example with no factory: $mac = new Mac(); example with a factory: $appleStore = new AppleStore(); $mac = $appleStore->getProduct('mac'); How does the factory pattern decouple the client from the product? Could someone give an example of a future code change that will impact on example 1 negative, but positive in example 2 so I understand the importance of decoupling? Thanks.

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  • Is there a way to pass a regex capture to a block in Ruby?

    - by Gordon Fontenot
    I have a hash with a regex for the key and a block for the value. Something like the following: { 'test (.+?)' => { puts $1 } } Not exactly like that, obviously, since the block is being stored as a Proc, but that's the idea. I then have a regex match later on that looks a lot like this hash.each do |pattern, action| if /#{pattern}/i.match(string) action.call end end The idea was to store the block away in the hash to make it a bit easier for me to expand upon in the future, but now the regex capture doesn't get passed to the block. Is there a way to do this cleanly that would support any number of captures I put in the regex (as in, some regex patterns may have 1 capture, others may have 3)?

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  • IE8 is still caching my requests even with mathrandom.

    - by Ozaki
    TLDR IE is still caching my requests even with Math.random() included in the URL. So I added math random onto the end of my url: var MYKMLURL = 'http://' + host + 'data/pattern?key='+ Math.random(); I also added math random onto my function param: window.setTimeout(RefreshPatternData, 1000, MYKMLLAYER); function RefreshPatternData(layer) { layer.loaded = false; layer.setVisibility(true); layer.refresh({ force: true, params: { 'key': Math.random()} }); setTimeout(RefreshPatternData, 30000, MYKMLLAYER); } So the request appears as http://host/data/pattern?key=35678652545 etc. It changes everytime the request is made. It works in Firefox & Chrome & Safari etc. But IE8 is still caching the data and not updating my layer. Any ideas as to why this might be occuring?

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  • i have done code so please help

    - by davit-datuashvili
    public class bitap{ public static void main(String[]args){ String text="tbillisi"; String pattern="tbilxiri"; int k=2; int m=pattern.length(); long pattern_mask[]=new long[Character.MAX_VALUE+1]; String result=""; boolean[]R=new boolean[m+1]; long i,d; for (i=0;i<=k;i++){ R[i]=~1; } for (i=0;i if (0==(R[k]& (1< System.out.println(result); } } http://en.wikipedia.org/wiki/Bitap_algorithm from this site

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  • Regular Expression repetition of class

    - by codersarepeople
    I am trying to figure out a regular expression for the following: <tr class="A">.*</tr><tr class="(B|C)">.*</tr> Now The second tr class will repeat an unknown number of times, with something unknown in between repetitions, but simply putting it in parentheses and added a plus doesn't work. Here's the PHP code that didn't work: $pattern = '/<tr\ class=\"A\">.*(<tr\ class=\"(B|C)\">.*<\/tr>.*)+/'; preg_match_all($pattern,$playerHtml,$scores); But it only returns the first Here's an example of something that should match: <tr class="A">blah</tr>blah <tr class="B">blah</tr>blah <tr class="B">blah</tr>blah <tr class="C">blah</tr> This only matches blahblahblah

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  • Get all text between tags with preg_match_all() or better function?

    - by kylex
    2010-June-11 <remove>2010-June-2</remove> <remove>2010-June-3</remove> 2010-June-15 2010-June-16 2010-June-17 2010-June-3 2010-June-2 2010-June-1 I'm trying to find all instances that are between the <remove> tags This is what I have: $pattern = "/<remove>(.*?)<\/remove>/"; preg_match_all($pattern, $_POST['exclude'], $matches); foreach($matches as $deselect){ foreach ($deselect as $display){ echo $display."<br />"; } } This is what it returns: 2010-June-2 2010-June-3 2010-June-2 2010-June-3 Why is it doubling up, and how do I prevent that?

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  • How to reduce latency of data sent through a REST api

    - by Sid
    I have an application which obtains data in JSON format from one of our other servers. The problem I am facing is, there is is significant delay when when requesting for this information. Since a lot of data is passed (approx 1000 records per request where each record is pretty huge) is there a way that compression would help reducing the speed. If so which compression scheme would you recommend. I read on another thread that they pattern of data also matters a lot on they type of compression that needs to be used. The pattern of data is consistent and resembles the following :desc=>some_description :url=>some_url :content=>some_content :score=>some_score :more_attributes=>more_data Can someone recommend a solution to how I could reduce this delay. They delay is approx 6-8 seconds. I'm using Ruby on Rails to develop this application and the server providing the data uses Python for the most part.

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  • PHP preg_match image between html tags

    - by Alvins
    I've got an html template like this: <div class="cont"> <div class="..."> <p>...<p> <img alt="" class="popup" src="DESIRED IMAGE LINK" style="..." /></p><p>...</p> .... And i want to extract "DESIRED IMAGE LINK" inside the "" tag, currently i'm using this: $pattern = '<div class="cont">.*?src=["\']?([^"\']?.*?(png|jpg|jpeg|gif))["\']?/i'; if (preg_match($pattern, $content, $image)) ..... But it doesn't work, the error is: warning: preg_match() [function.preg-match]: Unknown modifier '.' How can i fix it? Thanks

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  • scala: how to rewrite this function using for comprehension

    - by opensas
    I have this piece of code with a couple of nasty nested checks... I'm pretty sure it can be rewritten with a nice for comprehension, but I'm a bit confused about how to mix the pattern matching stuff // first tries to find the token in a header: "authorization: ideas_token=xxxxx" // then tries to find the token in the querystring: "ideas_token=xxxxx" private def applicationTokenFromRequest(request: Request[AnyContent]): Option[String] = { val fromHeaders: Option[String] = request.headers.get("authorization") val tokenRegExp = """^\s*ideas_token\s*=\s*(\w+)\s*$""".r val tokenFromHeader: Option[String] = { if (fromHeaders.isDefined) { val header = fromHeaders.get if (tokenRegExp.pattern.matcher(header).matches) { val tokenRegExp(extracted) = header Some(extracted) } else { None } } else { None } } // try to find it in the queryString tokenFromHeader.orElse { request.queryString.get("ideas_token") } } any hint you can give me?

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  • Deprecated: Function eregi() is deprecated, how to solve this error ?

    - by Jitendra Vyas
    I'm using this php code. but it's giving error Deprecated: Function eregi() is deprecated in C:\xampp\htdocs\fuel\emailcheck.php on line 7 <? include_once("mastersecure.php"); $emailcheck=$_POST["member_name"]; function isValidEmail($email){ $pattern = "^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$"; if (eregi($pattern, $email)){ return true; } else { return false; } } if (!isValidEmail($_POST['member_name'])){ echo "The email is invalid!"; } else { $query="select email from fuel where email='$_POST[member_name]'"; $res=mysql_query($query); $rowcount=mysql_num_rows($res); if($rowcount!=0) { echo "This mail is already exits"; } } ?> Any solution for this?

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  • Refactoring FAT client legacy application

    - by Paul
    I am working on a fat client legacy C++ application which has a lot of business logic mixed in with the presentation side of things. I want to clean things out and refactor the code out completely, so there is a clear seperation of concerns. I am looking at MVC or some other suitable design pattern in order to achieve this. I would like to get recommendations from people who have walked this road before - Do I use MVP or MVC (or another pattern)? What is/are the best practices for undertaking something like this (i.e. useful steps/checks) ?

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  • Google app engine-php: script handler

    - by Eve
    I try to create php web app using GAE. In the GAE tutorial, "A script handler executes a PHP script to handle the request that matches the URL pattern. The mapping defines a URL pattern to match, and the script to be executed" Now I want to map the url with the file having same name in the folder, e.g. if the url is /hello.* , it will map the file name hello.php in the folder. And if it is /hello1.*, hello1.php in the folder will be responded to the server. I thought this should be done directly by mapping the name of the url with the name in the folder. But if I left empty for the handler in the app.yaml, I got an error. So I want to know how to set up the handler in app.yaml?

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  • What type of structure should be here ?

    - by Harikrishna
    I have need of suggestion here that how should be the xml structure here for my need. I want to store data for more than one table in single xml file that is I want to define more than one table in single xml file.And I want to set more than one attribute for each column definition. Like I have three tables PersonalInfo,OfficeDetail,OtherInfo. Columns for each tables : PersonalInfo: Columns: Name, Address Attributtes: Name optional="true" IsInSameColumn="true" Pattern="abc" OfficeDetail: Columns: Pid, Work Attributtes: Pid optional="true" IsInSameColumn="true" Pattern="798" OtherInfo : Columns: PhoneNo How Should be the xml structure here such that I can read it like if only a single table I want to read from xml file.

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  • How to sort an array by (smallest, largest, second smallest, second, largest) etc?

    - by Binka
    Any ideas? I can sort an array. But not in this pattern? It needs to sort by the pattern I mentioned above. public void wackySort2(int[] nums) { int sign = 0; int temp = 0; int temp2 = 0; for (int i = 0; i < nums.length; i++) { for (int j = 0; j < nums.length - 1; j++) { if (nums[j] > nums[j + 1]) { temp = nums[j]; nums[j] = nums[j + 1]; nums[j + 1] = temp; //sign = 1; System.out.println("Something has been done"); } } } }

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  • .NET DB Query Without Allocations?

    - by Michael Covelli
    I have been given the task of re-writing some libraries written in C# so that there are no allocations once startup is completed. I just got to one project that does some DB queries over an OdbcConnection every 30 seconds. I've always just used .ExecuteReader() which creates an OdbcDataReader. Is there any pattern (like the SocketAsyncEventArgs socket pattern) that lets you re-use your own OdbcDataReader? Or some other clever way to avoid allocations? I haven't bothered to learn LINQ since all the dbs at work are Oracle based and the last I checked, there was no official Linq To Oracle provider. But if there's a way to do this in Linq, I could use one of the third-party ones.

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  • the font of xubuntu

    - by ubuntu
    HI: How to set the default font for different language in the xubuntu? For example, I am using xubuntu9.10(English release),and I do not like the default English and Chinese font. I have tried to use "Application-setting-appearance-fonts" to edit the default font,however it just work for the English. The default font of Chinese is "WenQuanYi Zen Hei". I do not like it. I want to use "Microsoft YaHei", I copy this file from my Win7 system. And I tried remove the "WenQuanYi Zen Hei" by "sudo aptitude remove ttf-wqy",it show me it is successfully removed. Also I have modify the file: /etc/fonts/conf.avail/69-language-selector-zh-cn.conf to: <fontconfig> <match target="pattern"> <test qual="any" name="family"> <string>serif</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Microsoft YaHei</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>Bitstream Vera Serif</string> <string>DejaVu Serif</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> <match target="pattern"> <test qual="any" name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Bitstream Vera Sans</string> <string>Microsoft YaHei</string> <string>DejaVu Sans</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> <match target="pattern"> <test qual="any" name="family"> <string>monospace</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Bitstream Vera Sans Mono</string> <string>Microsoft YaHei</string> <string>DejaVu Sans Mono</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> </fontconfig> However when I use the firefox, I found the title of the firefox window is not YaHei. See the image here So what is the problem?

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  • the font of xubuntu

    - by ubuntu
    HI: How to set the default font for different language in the xubuntu? For example, I am using xubuntu9.10(English release),and I do not like the default English and Chinese font. I have tried to use "Application-setting-appearance-fonts" to edit the default font,however it just work for the English. The default font of Chinese is "WenQuanYi Zen Hei". I do not like it. I want to use "Microsoft YaHei", I copy this file from my Win7 system. And I tried remove the "WenQuanYi Zen Hei" by "sudo aptitude remove ttf-wqy",it show me it is successfully removed. Also I have modify the file: /etc/fonts/conf.avail/69-language-selector-zh-cn.conf to: <fontconfig> <match target="pattern"> <test qual="any" name="family"> <string>serif</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Microsoft YaHei</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>Bitstream Vera Serif</string> <string>DejaVu Serif</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> <match target="pattern"> <test qual="any" name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Bitstream Vera Sans</string> <string>Microsoft YaHei</string> <string>DejaVu Sans</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> <match target="pattern"> <test qual="any" name="family"> <string>monospace</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Bitstream Vera Sans Mono</string> <string>Microsoft YaHei</string> <string>DejaVu Sans Mono</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> </fontconfig> However when I use the firefox, I found the title of the firefox window is not YaHei. See the image here So what is the problem?

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  • the font of xubuntu

    - by ubuntu
    HI: How to set the default font for different language in the xubuntu? For example, I am using xubuntu9.10(English release),and I do not like the default English and Chinese font. I have tried to use "Application-setting-appearance-fonts" to edit the default font,however it just work for the English. The default font of Chinese is "WenQuanYi Zen Hei". I do not like it. I want to use "Microsoft YaHei", I copy this file from my Win7 system. And I tried remove the "WenQuanYi Zen Hei" by "sudo aptitude remove ttf-wqy",it show me it is successfully removed. Also I have modify the file: /etc/fonts/conf.avail/69-language-selector-zh-cn.conf to: <fontconfig> <match target="pattern"> <test qual="any" name="family"> <string>serif</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Microsoft YaHei</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>Bitstream Vera Serif</string> <string>DejaVu Serif</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> <match target="pattern"> <test qual="any" name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Bitstream Vera Sans</string> <string>Microsoft YaHei</string> <string>DejaVu Sans</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> <match target="pattern"> <test qual="any" name="family"> <string>monospace</string> </test> <edit name="family" mode="prepend" binding="strong"> <string>Bitstream Vera Sans Mono</string> <string>Microsoft YaHei</string> <string>DejaVu Sans Mono</string> <string>AR PL UMing CN</string> <string>AR PL ShanHeiSun Uni</string> <string>AR PL UKai CN</string> <string>AR PL ZenKai Uni</string> </edit> </match> </fontconfig> However when I use the firefox, I found the title of the firefox window is not YaHei. See the image here So what is the problem?

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  • C++ vs Matlab vs Python as a main language for Computer Vision Postgraduate

    - by Hough
    Hi all, Firstly, sorry for a somewhat long question but I think that many people are in the same situation as me and hopefully they can also gain some benefit from this. I'll be starting my PhD very soon which involve the fields of computer vision, pattern recognition and machine learning. Currently, I'm using opencv (2.1) C++ interface and I especially like its powerful Mat class and the overloaded operations available for matrix and image seamless operations and transformations. I've also tried (and implemented many small vision projects) using opencv python interface (new bindings; opencv 2.1) and I really enjoy python's ability to integrate opencv, numpy, scipy and matplotlib. But recently, I went back to opencv C++ interface because I felt that the official python new bindings were not stable enough and no overloaded operations are available for matrices and images, not to mention the lack of machine learning modules and slow speeds in certain operations. I've also used Matlab extensively in the past and although I've used mex files and other means to speed up the program, I just felt that Matlab's performance was inadequate for real-time vision tasks, be it for fast prototyping or not. When the project becomes larger and larger, many tasks have to be re-written in C and compiled into Mex files increasingly and Matlab becomes nothing more than a glue language. Here comes the sub-questions: For postgrad studies in these fields (machine learning, vision, pattern recognition), what is your main or ideal programming language for rapid prototyping of ideas and testing algorithms contained in papers? For postgrad studies, can you list down the pros and cons of using the following languages? C++ (with opencv + gsl + svmlib + other libraries) vs Matlab (with all its toolboxes) vs python (with the imcomplete opencv bindings + numpy + scipy + matplotlib). Are there computer vision PhD/postgrad students here who are using only C++ (with all its availabe libraries including opencv) without even needing to resort to Matlab or python? In other words, given the current existing computer vision or machine learning libraries, is C++ alone sufficient for fast prototyping of ideas? If you're currently using Java or C# for your postgrad work, can you list down the reasons why they should be used and how they compare to other languages in terms of available libraries? What is the de facto vision/machine learning programming language and its associated libraries used in your university research group? Thanks in advance.

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  • OCR for Devanagari (Hindi / Marathi / Sanskrit)

    - by Egon
    Does anybody have any idea about any recent work being done on optical character recognition for Indian scripts using modern Machine Learning techniques ? I know of some research being done at ISI, calcutta, but nothing new has come up in the last 3-4 years to the best of my knowledge, and OCR for Devanagari is sadly lacking!

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  • Breaking a captcha

    - by Fabiano PS
    What I'm looking for is a way to break this captcha: https://www.nfe.fazenda.gov.br/PORTAL/FormularioDePesquisa.aspx?tipoConsulta=completa Notice that the image alternates based on 2 types of images. Anyone knows a OCR (optical character recognition) 'damm good'for this? Other solutions also accepted (except proxing). I'm not looking for spamming, I just want to automatize my Software instead of proxing the image for the user. Nowhere in the site says it is forbidden to automatically parse the image.

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  • Is there a simple way to convert MySQL data into Title Case?

    - by john.designop.us
    I have a MySQL table where all the data in one column was entered in UPPERCASE, but I need to convert in to Title Case, with recognition of "small words" akin to the Daring Fireball Title Case script. I found this excellent solution for transforming strings to lowercase, but the Title Case function seems to have been left out of my version of MySQL. Is there an elegant way to do this?

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