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• One regular expression to match parts in various positions

  - by richsage

  Hi all, I'm trying to parse a DSN (from a Symfony application) using regular expressions, in order to link with a secondary application, but using the same database. The DSN I currently have is: mysql:dbname=my_db_name;host=localhost with a regex of: /^(\w+):(dbname=(\w+))?;?(host=(\w+))?/ (using preg_match()). This matches OK, but fails in my test environment because the DSN elements are switched around, thus: mysql:host=localhost;dbname=my_testdb_name I could just switch them round, yes :-) but I'm sure that extraction of the host and dbname parts from both DSNs is possible with a single regular expression, and I'd like to be able to enhance my knowledge at the same time ;-) Is there a way I can do this?

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• C - Discard the edges of an arbitrary level of a multidimensional array

  - by Medivh

  I have some geographical data, that I'm trying to parse into a usable format. The data is kept in NetCDF files, and is read out as a multidimensional array. My problem comes because the source of the geographical data has a strip of longitude on each side of the grid that overlaps the other side. That is, I have a longitude point of -1 degree, and another of 361 degrees. Unfortunately, I've got time, latitude, and sometimes height as dimensions in this array as well, and I have no way of predicting in advance where each dimension will be in the list (or if it's a three dimensional array, or a four dimensional array). Further complicating the problem, the array can be of floats, doubles or integers, so I have to pass it around as a void. Are there any NetCDF tools that I can use to pre-prepare the files? If not, how would you suggest I go about stripping the excess longitudes?

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• Java - Unknown characters passing as [a-zA-z0-9]*?

  - by Twodordan

  Hello, I'm no expert in regex but I need to parse some input I have no control over, and make sure I filter away any strings that don't have A-z and/or 0-9. When I run this, Pattern p = Pattern.compile("^[a-zA-Z0-9]*$"); //fixed typo if(!p.matcher(gottenData).matches()) System.out.println(someData); //someData contains gottenData certain spaces + an unknown symbol somehow slip through the filter (gottenData is the red rectangle): In case you're wondering, it DOES also display Text, it's not all like that. For now, I don't mind the [?] as long as it also contains some string along with it. Please help. [EDIT] as far as I can tell from the (very large) input, the [?]'s are either white spaces either nothing at all; maybe there's some sort of encoding issue, also perhaps something to do with #text nodes (input is xml)

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• Best practice when working with web services that return objects?

  - by Raj

  Hello, I'm currently working with web services that return objects such as a list of files e.g. File array. I wanted to know whether its best practice to bind this type of object directly to my front end code for example a repeater/listview or whether to first parse it into my own list of "file class" e.g. customFiles[] If the web service changes then it will break my front end code, however if I create my own CustomFile class, then i would only need to change my code in one place to fix the issue, but it just seems like a lot of extra work to create the same classes from a web service, i wanted to know what is the best practice for this type of work. thanks Raj.

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• Tracking/Counting Word Frequency

  - by Joel Martinez

  I'd like to get some community consensus on a good design to be able to store and query word frequency counts. I'm building an application in which I have to parse text inputs and store how many times a word has appeared (over time). So given the following inputs: "To Kill a Mocking Bird" "Mocking a piano player" Would store the following values: Word Count ------------- To 1 Kill 1 A 2 Mocking 2 Bird 1 Piano 1 Player 1 And later be able to quickly query for the count value of a given arbitrary word. My current plan is to simply store the words and counts in a database, and rely on caching word count values ... But I suspect that I won't get enough cache hits to make this a viable solution long term. Can anyone suggest algorithms, or data structures, or any other idea that might make this a well-performing solution?

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• Use CSS selectors to collect HTML elements from a streaming parser (e.g. SAX stream)

  - by Jakub Narebski

  How to parse CSS (CSS3) selector and use it (in jQuery-like way) to collect HTML elements not from DOM (from tree structure), but from stream (e.g. SAX), i.e. using sequential access parser? Are there CSS selectors that need access to DOM (Wikipedia SAX page says that XPath selectors "need to be able to access any node at any time in the parsed XML tree")? I am most inetersted in implementing selector combinators, e.g. 'A B' descendant selector. I prefer solutions describing algorithm, or in Perl.

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• How to receive HTTP messages using Socket

  - by Poma

  I'm using Socket class for my web client. I can't use HttpWebRequest since it doesn't support socks proxies. So I have to parse headers and handle chunked encoding by myself. The most difficult thing is to determine length of content so I have to read it byte-by-byte. First I have to use ReadByte() to find last header ("\r\n\r\n" combination), then read chunk's size etc. But this approach has very poor performance. Can you suggest better solution? Maybe some open source examples or libraries that handle http request through sockets (not very big and complicated though, I'm a noob)

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• How can i convert a string into byte[] of unsigned int 32 C#

  - by Miroo

  i have string like "0x5D, 0x50, 0x68, 0xBE, 0xC9, 0xB3, 0x84, 0xFF" i wanna convert it into byte[] key= new byte[] { 0x5D, 0x50, 0x68, 0xBE, 0xC9, 0xB3, 0x84, 0xFF}; i thought about splitting the string by ',' then loop on it and setvalue into another byte[] in index of i string Key = "0x5D, 0x50, 0x68, 0xBE, 0xC9, 0xB3, 0x84, 0xFF"; string[] arr = Key.Split(','); byte[] keybyte= new byte[8]; for (int i = 0; i < arr.Length; i++) { keybyte.SetValue(Int32.Parse(arr[i].ToString()), i); } but seems like it doesn't work i get error in converting the string into unsigned int32 on the first beginning an help would be appreciated

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• parsing Two-dimensional array in c

  - by gitter78

  I'm trying to parse an array that looks like the one below: char *arr[][2] = { { "1", "Purple" }, { "2", "Blue" }, { "22", "Red" }, ... }; I was thinking having a loop as: char *func(char *a){ for(i = 0; i<sizeof(arr)/sizeof(arr[0]);i++){ if(strstr(a,arr[i][0])!=NULL) return arr[i][1]; } } char *out; const char *hello = "this is my 2 string"; out = func(hello); In this case, I'm trying to get the second value based on the first one: Purple, Blue Red, etc.. The question is how would go in parsing this and instead of printing out the value, return the value. UPDATE/FIXED: It has been fixed above. Thanks

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• How do I return a variable from $.post() in jQuery? Closure variable?

  - by James Bao

  I am having trouble passing data retrieved from a $.post() function to use in other places in my code. I want to save the data as a variable and use it outside of the post() function. This is my code: var last_update = function() { $.post('/--/feed', {func:'latest', who:$.defaults.login}, function($j){ _j = JSON.parse($j); alert(_j.text); // This one works }); } alert(_j.text); // This one doesn't }; last_update(); //run the function Please help!

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• Comparing two xml files

  - by Ragini

  I have two large xml files. Almost 1.4 mb each. I want to compare them and see the differing part. I am using linux. Is there any free tool which can do this for me ? Or any other technique ? I used "diff" command in linux and tried to output the result in another file. (diff file1.xml file2.xml result.xml) But the resulted file showed "Could not parse the xml". However it showed something on screen. I would like the differ part to be stored somewhere if possible. (or atleast I should be able to see it properly) Thanks Ragini

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• Can I detect unused extra parameters passed to javascript methods?

  - by Pablojim

  In Javascript I can call any method with more than the necessary amount of parameters and the extra parameters are silently ignored. e.g. letters = ['a','b','c'] //correct letters.indexOf('a') //This also works without error or warning letters.indexOf('a', "blah", "ignore me", 38) Are there ways to detect cases where this occurs? My motivation is that in my experience cases where this occurs are usually bugs. Identification of these by code analysis or at runtime would help track these errors down. These cases are especially prevalent where people are expecting alterations to base types which may not have occurred. Logging a warning where this happens e.g. Date.parse('02--12--2012', 'dd--MM--YYYY') Notes: To be clear I would like a solution that doesn't involve me sprinkling checks all over my code and other peoples' code.

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• Android -- How to post app rating/comments to Market from within app?

  - by borg17of20

  Hello all, This is a simple question. Is there a way to allow users to enter in a comment and or rating for my app from directly within my app and have that data posted back to the Android Market? If so, what would the code for that look like if I used an EditText view to allow user input? If not, then is my only other option directly linking to my app in the Market (i.e. the user clicks the link in my app, or a button, and the Market app launches with my app page displayed)? For example: view.setOnClickListener( new OnClickListener(){ public void onClick(View v) { startActivity( new Intent( Intent.ACTION_VIEW, Uri.parse("market://details?id=packagename") ) ); } } *where "packagename" is replaced by my app's package name from the manifest. Thanks.

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• Digester: Extracting node name for a map<tagname, value>

  - by enguerran

  My question is close to this one: Digester: Extracting node name Even with the answer, I can't find out. Here is my xml file (from smartgwt RestDataSource POST): <data> <isc_OID_14> <attribute1>value1</attribute1> <attribute2>value2</attribute2> </isc_OID_14> </data> I would like to create, with Commons Digester, the following map : {attribute1=value1, attribute2=value2} I already have those lines: digester = new Digester(); digester.addObjectCreate("data", HashMap.class); // some "put" rules matching something like data/* return digester.parse(myFile); I do not know the list nor the name of tags in the <data><sourceId /></data>. isc_OID_14 or attribute1 can be named foobar or id or attribute335...

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• How to determine MIME Type set by htaccess in PHP

  - by Ed Marty

  I have a .htaccess file set up to define specific MIME types in directory root/a/b/, and all of the files are in the same directory. I have a php file that wants to serve those files, in directory root/c/, and needs to determine the content-type as defined by the .htaccess file. Is there any way to do this? PHP version is 5.1.6. mime_content_type returns text/plain, and I'd rather not try to parse the .htaccess file manually. I can move the file if necessary.

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• How to get Anchor text using DomDocument?

  - by Click Upvote

  Say I have this html: <a href="http://example.com">Test</a> I parse it using dom document with this code: $dom = new DomDocument(); @$dom->loadHTML($html); $urls = $dom->getElementsByTagName('a'); And then I run this code: foreach ($urls as $url) { //echo "<br> {$url->getAttribute('href')} , {$url->getAttribute('title')}"; foreach ($url->attributes as $a) { echo "<br>$a->name is $a->value"; } echo "<hr><br>"; } When I do this, I only see 'href' as an attribute of the url, there's no way to get the 'anchor text' (in the above case 'Test'). How can I get the anchor text of the link?

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• Android - How to launch Google map intent in android app with certain location, zoom level and marker

  - by umirza47

  Map Intent not working with specific zoom level as well as custom marker float lat = 40.714728f; float lng = -73.998672f; String maplLabel = "ABC Label"; final Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("geo:0,0?q="+lat+","+lng+"&z=16 (" + maplLabel + ")")); startActivity(intent); Anybody know what is wrong? or how to do so? I want to show map of certain (lat,lng) with a custom label-marker at a specific zoom level.

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• Read Xlement fully using LinQ

  - by Ramya

  Hi, I have an XElement which I am getting after parsing an xml. This XElement needs to be read only when the need arises so, I have stored it in a list for future use. I have to read this XElement using LinQ. XDocument doc = XDocument.Parse(DataManager.offeringElements[index].DataElem.ToString()); var docNode = from dataNode in doc.Descendants("DataLinks") select new { Offering = dataNode .Element("link").Value, linkUrl = dataNode.Element("link").Attribue ("href").Value }; the Xelement has the following nodes a. Management b. Analytics c. Development My problem is that I am not able to read all the three nodes.I am able to get only the first node. Where am I going wrong?

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• C# UDP Socket taking time to send data to unknown IP

  - by Mohsan

  Hi. i am sending data to UDP socket using this code Socket udpClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse(obj.destAddress), obj.destPort); byte[] buf = new byte[obj.length]; Array.Copy((byte[])obj.data, buf, obj.length); int n = udpClient.SendTo(buf, ipEndPoint); udpClient.Close(); this code works fine when IP exists in current network, but it takes 3-5 seconds when I send data to unknown IP address. This causes main application to hang for 3-5 seconds.. What could be the reason behind this problem..

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• How can a string timestamp with hours 0 to 24 be parsed

  - by user897052

  I am trying to parse a string timestamp of format "yyyyMMddHHmmss" with DateTime.ParseExact(). The catch is I must allow for an hour value of "24" (i.e. hours can be from 0 to 24; Note: I can't control the input values.) and, of course, that results in an exception. Are there any settings/properties I can set instead of manually parsing/using regex's? If not, any efficient parsing ideas? ex. DateTime.ParseExact("20120911240000", "yyyyMMddHHmmss", System.Globalization.CultureInfo.InvariantCulture); hour 24 means hour 0 of next day (so day + 1, hour = 0)

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• Approach to data wrapping

  - by Mikhail

  I'm developing in PHP and MySQL. The information about the currently logged in user is stored in many different tables. The information that I need on each page, I preload. However if something is needed from a rarely accessed table - then I do $newdata = $db->Query('SELECT * FROM rare_table WHERE user_id='.$user->id); I would like to simplify the above to a point where I don't have to specify that the query should be limited to this particular user. An ideal function call would be: $newdata = $user->Query('SELECT * FROM rare_table'); Obviously I'd have to parse the SQL and add a WHERE clause. Or add to the already existing clause. Questions: are there tools to do this? How can I develop this? Is this even a good idea?

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• How to extract img src, title and alt from html using php?

  - by Sam

  I would like to create a page where all images which reside on my website are listed with title and alternative representation. I already wrote me a little program to find and load all html files, but now I am stuck at how to extract src, title and alt from the html < img src="/image/fluffybunny.jpg" title="Harvey the bunny" alt="a cute little fluffy bunny"/ I guess this should be done with some regex, but since the order of the tags may vary, and I need all of them, I don't really know how to parse this in an elegant way (I could do it the hard char by char way, but thats painful).

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• Asking for input without stopping the script in python.

  - by ImTooStupidForThis

  I am (trying) to make a simple IRC client in python (as kind of a project while I learn the language). I have a loop that I use to receive and parse what the IRC server sends me, but if I use raw_input to input stuff, it stops the loop dead in its tracks until I input something (obviously). How can I input something without the loop stopping? Thanks in advance. (I don´t think I need to post the code, I just want to input something without the while 1 loop stopping.)

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• Would it be simply better to use the system's functions rather than use the language?

  - by Nullw0rm

  There are many scenarios where I've questioned PHP's performance with some of its functions, and whether I should build a complex class to handle specific things using its seemingly slow tools. For example, Complex regular expressions with sed and processing with awk would seemingly be exponential in performance rather than making PHP's regular expression and seemingly excessive functions parse and in time manage to finish it. If I were to do a lot of network tasks such as MX lookups/DIGging/retrieving simultaneously I would rather pass it via system() and let the OS handle it itself. There are simply too many functions in PHP, that are inefficient and result in slow pages or can be handled easier by the OS. What are your opinions? Do you think I should do the hard work with the OS in its own/custom functions?

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• Lucene: Fastest way to return the document occurance of a phrase?

  - by dont say the kid's name

  Hi Guys, I am trying to use Lucene (actually PyLucene!) to find out how many documents contain my exact phrase. My code currently looks like this... but it runs rather slow. Does anyone know a faster way to return document counts? phraseList = ["some phrase 1", "some phrase 2"] #etc, a list of phrases... countsearcher = IndexSearcher(SimpleFSDirectory(File(STORE_DIR)), True) analyzer = StandardAnalyzer(Version.LUCENE_CURRENT) for phrase in phraseList: query = QueryParser(Version.LUCENE_CURRENT, "contents", analyzer).parse("\"" + phrase + "\"") scoreDocs = countsearcher.search(query, 200).scoreDocs print "count is: " + str(len(scoreDocs))

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