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• I need to Split a string based on a complex delimiter

  - by Jason

  In C# I need to split a string (a log4j log file) into array elements based on a particular sequence of characters, namely "nnnn-nn-nn nn:nn:nn INFO". I'm currently splitting this log file up by newlines, which is fine except when the log statements themselves contain newlines. I don't control the input (the log file) so escaping them somehow is not an option. It seems like I should be able to use a comparator or a regex to identify the strings, but String.Split does not have an option like that. Am I stuck rolling my own, or is there a pattern or framework component that can be of help here?

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• JPA @TableGenerator shared between multiple entities

  - by Mauricio

  Hi Guys, I have a 'dog' Entitiy with an @Id and a @TableGenerator ... @TableGenerator(table = "seq", name = "dog_gen", pkColumnName = "seq_name", valueColumnName="seq_val") @Id @GeneratedValue(strategy = GenerationType.TABLE, generator = "dog_gen") private Long id; ... Is there a way to reuse the same table generator (dog_gen) in other entity? I want to keep the same id sequence in two independent Entities, say dog=1, dog=2, dog=3, cat=4, cat=5, dog=6 and so on... Both entities don't share a common superclass to implement some kind of inheritance with the id property. If I add the @GeneratedValue( generator="dog_gen") on my cat entity, omitting the @TableGenerator declaration throws an Exception saying it can't find the generator when starting the context. Caused by: org.hibernate.AnnotationException: Unknown Id.generator: dog_gen at org.hibernate.cfg.BinderHelper.makeIdGenerator(BinderHelper.java:413) at org.hibernate.cfg.AnnotationBinder.bindId(AnnotationBinder.java:1795) at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1229) at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:733) at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:498) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:277)

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• Short unique id in php

  - by Antti

  I want to create a unique id but uniqid() is giving something like '492607b0ee414'. What i would like is something similar to what tinyurl gives: '64k8ra'. The shorter, the better. The only requirements are that it should not have an obvious order and that it should look prettier than a seemingly random sequence of numbers. Letters are preferred over numbers and ideally it would not be mixed case. As the number of entries will not be that many (up to 10000 or so) the risk of collision isn't a huge factor. Any suggestions appreciated.

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• Hadoop 0.2: How to read outputs from TextOutputFormat?

  - by S.N

  My reducer class produces outputs with TextOutputFormat (the default OutputFormat given by Job). I like to consume this outputs after the MapReduce job complete to aggregate the outputs. In addition to this, I like to write out the aggregated information with TextInputFormat so that the output from this process can be consumed by the next iteration of MapReduce task. Can anyone give me an example on how to write & read with TextFormat? By the way, the reason why I am using TextFormat, rather Sequence, is the interoperability. The outputs should be consumed by any software.

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• Fastest sort of fixed length 6 int array

  - by kriss

  Answering to another StackOverflow question (this one) I stumbled upon an interresting sub-problem. What is the fastest way to sort an array of 6 ints ? As the question is very low level (will be executed by a GPU): we can't assume libraries are available (and the call itself has it's cost), only plain C to avoid emptying instruction pipeline (that has a very high cost) we should probably minimize branches, jumps, and every other kind of control flow breaking (like those hidden behind sequence points in && or ||). room is constrained and minimizing registers and memory use is an issue, ideally in place sort is probably best. Really this question is a kind of Golf where the goal is not to minimize source length but execution speed. I call it 'Zening` code as used in the title of the book Zen of Code optimization by Michael Abrash and it's sequels.

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• Does python have one way of doing things?

  - by gath

  I have always seen in python articles/books that python is simple and it has only one way of doing things. I would like someone to explain to me this concept keeping in mind the example below, if i wanted to get the min and max values of sequence i would do the following; seq=[1,2,3,4,5,6] min(seq) #1 max(seq) #6 but i can also do this; seq[:1] #1 seq[-1] #6 surely this are two ways of doing one simple thing. This confuses me a bit. Gath

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• Calculating a range of an exact number of values in Python

  - by Einar

  Hello, I'm building a range between two numbers (floats) and I'd like this range to be of an exact fixed length (no more, no less). range and arange work with steps, instead. To put things into pseudo Python, this is what I'd like to achieve: start_value = -7.5 end_value = 0.1 my_range = my_range_function(star_value, end_value, length=6) print my_range [-7.50,-5.98,-4.46,-2.94,-1.42,0.10] This is essentially equivalent to the R function seq which can specify a sequence of a given length. Is this possible in Python? Thanks.

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• Can't see drop down list in Excel VBA

  - by Ten Ton Gorilla

  I've created a very simple drop down list in excel. It holds a sequence of integers loaded from a cell range (years). I need to read the selected value in vba. However I can't even seem to find the control! I've tried CboYear Sheet2.CboYear Worksheets("SheetName").CboYear etc. etc. From everywhere in VBA this control just doesn't exist. All the tutorial I find seem to assume that using just the control name will work. I've tried the code in the sheet itself, the workbook, and a module, no luck.

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• What does this xkcd code do?

  - by cobbal

  On the xkcd site today, the following appeared as a joke in a <script language="scheme"> tag so what does the following code do / represent? (define (eval exp env) (cond ((self-evaluating? exp) exp) ((variable? exp) (lookup-variable-value exp env)) ((quoted? exp) (text-of-quotation exp)) ((assignment? exp) (eval-assignment exp env)) ((definition? exp) (eval-definition exp env)) ((if? exp) (eval-if exp env)) ((lambda? exp) (make-procedure (lambda-parameters exp) (lambda-body exp) env)) ((begin? exp) (eval-sequence (begin-actions exp) env)) ((cond? exp) (eval (cond->if exp) env)) ((application? exp) (apply (eval (operator exp) env) (list-of-values (operands exp) env))) (else (error "Common Lisp or Netscape Navigator 4.0+ Required" exp))))

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• Cannot combine commits using TortoiseGit

  - by JC

  I have two branches with several commits each. On one branch, I can go to the log, select two commits, and TortoiseGit shows "combine to one commit" in the context menu. On the other branch this option does not show in the context menu. Both sequence of commits is very similar; add file then modify it, so there is no difference really between the branches. What factors would cause this "combine to one commit" to not be available? I'm wondering if I should just switch to the command line.

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• Returning Index in Enumerable Select

  - by Jon

  I have a List<MyClass> with 2 items which have a SequenceNumber property. If I use this code below the returned index is 0 not 1: var test = TrackingCollection .Where(x => x.SequenceNumber == 2) .Select((item, index) => new { index, item.SequenceNumber }); Is this because that refers to 0 as the index in my new anonymous type or is it some zero index based weirdness that I just need to increment. What I'm after is to return the index in TrackingCollection where the sequence number is 2 or 887 or any other correct index in the original collection...

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• Using Spring's KeyHolder with programmatically-generated primary keys

  - by smayers81

  Hello, I am using Spring's NamedParameterJdbcTemplate to perform an insert into a table. The table uses a NEXTVAL on a sequence to obtain the primary key. I then want this generated ID to be passed back to me. I am using Spring's KeyHolder implementation like this: KeyHolder key = new GeneratedKeyHolder(); jdbcTemplate.update(Constants.INSERT_ORDER_STATEMENT, params, key); However, when I run this statement, I am getting: org.springframework.dao.DataRetrievalFailureException: The generated key is not of a supported numeric type. Unable to cast [oracle.sql.ROWID] to [java.lang.Number] at org.springframework.jdbc.support.GeneratedKeyHolder.getKey(GeneratedKeyHolder.java:73) Any ideas what I am missing?

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• Does android support playlists for video files?

  - by DanJ

  I'm and android beginner, so go easy on me ;-) I'm trying to play a sequence of video files which I'm downloading from a server. The challenge is that I want to have a smooth transition from one file to another. My thought is to have two MediaPlayer instances each preparing and then playing in turn. It is not clear to me if they can both share the same SurfaceView? Or maybe, I should be using different views and swapping between them? Or, the idea is a bad idea all together? When I try to run configure the MediaPlayer instance with a view that isn't visible it seems to crash my emulator.

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• Lost in UTF-8 hell. (Django and Python)

  - by user140314

  I am working through the Django RSS reader project here. The RSS feed will read something like "OKLAHOMA CITY (AP) — James Harden let". The RSS feed's encoding reads encoding="UTF-8" so I believe I am passing utf-8 to markdown in the code snippet below. The em dash is where it chokes. I get the Django error of "'ascii' codec can't encode character u'\u2014' in position 109: ordinal not in range(128)" which is an UnicodeEncodeError. In the variables being passed I see "OKLAHOMA CITY (AP) \u2014 James Harden". The code line that is not working is: content = content.encode(parsed_feed.encoding, "xmlcharrefreplace") I am using markdown 2.0, django 1.1, and python 2.4. What is the magic sequence of encoding and decoding that I need to do to make this work? Thanks.

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• What's the best way to read/write array contents from/to binary files in C#?

  - by Eric

  I would like to read and write the contents of large ( 2GB), raw volume files (e.g. MRI scans). These files are just a sequence of e.g. 32 x 32 x 32 floats so they map well to 1D arrays. I would like to be able to read the contents of the binary volume files into 1D arrays of e.g. float or ushort (depending on the data type of the binary files) and similarly export the arrays back out to the raw volume files. What's the best way to do this with C#? Read/Write them 1 element at a time with BinaryReader/BinaryWriter? Read them piece-wise into byte arrays with FileStream.Read and then do a System.Buffer.BlockCopy between arrays (keeping in mind that I want 2GB arrays)? Write my own Reader/Writer?

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• Better way to write this regex to match multi-ordered property list?

  - by Andrew Philips

  I've been whacking on this regex for a while, trying to build something that can pick out multiple ordered property values (DTSTART, DTEND, SUMMARY) from an .ics file. I have other options (like reading one line at a time and scanning), but wanted to build a single regex that can handle the whole thing. SAMPLE PERL # There has got to be a better way... my $x1 = '(?:^DTSTART[^\:]*:(?<dts>.*?)$)'; my $x2 = '(?:^DTEND[^\:]*:(?<dte>.*?)$)'; my $x3 = '(?:^SUMMARY[^\:]*:(?<dtn>.*?)$)'; my $fmt = "$x1.*$x2.*$x3|$x1.*$x3.*$x2|$x2.*$x1.*$x3|$x2.*$x3.*$x1|$x3.*$x1.*$x2|$x3.*$x2.*$x1"; if ($evts[1] =~ /$fmt/smo) { printf "lines:\n==>\n%s\n==>\n%s\n==>\n%s\n", $+{dts}, $+{dte}, $+{dtn}; } else { print "Failed.\n"; } SAMPLE DATA BEGIN:VEVENT UID:0A5ECBC3-CAFB-4CCE-91E3-247DF6C6652A TRANSP:OPAQUE SUMMARY:Gandalf_flinger1 DTEND:20071127T170005 DTSTART,lang=en_us:20071127T103000 DTSTAMP:20100325T003424Z X-APPLE-EWS-BUSYSTATUS:BUSY SEQUENCE:0 END:VEVENT SAMPLE OUTPUT lines: == 20071127T103000 == 20071127T170005 == Gandalf_flinger1

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• Open Id XRDS Discovery

  - by Asciant

  I am working with Open Id, just playing around making a class to interact / auth Open Id's on my site (in PHP). I know there are a few other Libraries (like RPX), but I want to use my own (its good to keep help better understand the protocol and whether its right for me). The question I have relates to the Open Id discovery sequence. Basically I have reached the point where I am looking at using the XRDS doc to get the local identity (openid.identity) from the claimed identity (openid.claimed_id). My question is, do I have to make a cURL request to get the XRDS Location (X-XRDS-location) and then make another cURL request to get the actual XRDS doc?? It seems like with a DUMB request I only make one cURL request and get the Open Id Server, but have to make two to use the XRDS Smart method. Just doesn't seem right, can anyone else give me some info.

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• Cost of using repeated parameters

  - by Palimondo

  I consider refactoring few method signatures that currently take parameter of type List or Set of concrete classes --List[Foo]-- to use repeated parameters instead: Foo*. This would allow me to use the same method name and overload it based on the parameter type. This was not possible using List or Set, because List[Foo] and List[Bar] have same type after erasure: List[Object]. In my case the refactored methods work fine with scala.Seq[Foo] that results from the repeated parameter. I would have to change all the invocations and add a sequence argument type annotation to all collection parameters: baz.doStuffWith(foos:_*). Given that switching from collection parameter to repeated parameter is semantically equivalent, does this change have some performance impact that I should be aware of? Is the answer same for scala 2.7._ and 2.8?

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• ZSI.generate.Wsdl2PythonError: unsupported local simpleType restriction

  - by diegor

  Hi guys, i have this simple type from an external webservice: <xsd:element name="card_number" maxOccurs="1" minOccurs="1"> <xsd:simpleType> <xsd:restriction base="tns:PanType"> <xsd:pattern value="\d{16}"></xsd:pattern> <xsd:whiteSpace value="collapse"></xsd:whiteSpace> </xsd:restriction> </xsd:simpleType> </xsd:element> but whe i launch wsdl2py -b filename.wsdl i got this error: ZSI.generate.Wsdl2PythonError: unsupported local simpleType restriction: <schema targetNamespace="https://xxxxx.yyyyy.zz/sss/"><complexType name="PaymentReq"><sequence><element name="card_number"><simpleType> How can i fix this? I tried to change from simpleType to compleType and wsdl2py generate python code without problem. In this way i can't be able to use card_number in my python object. Thanks for helping.

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• OpenType programming

  - by Sorush Rabiee

  Hi all Recently i asked two questions (1 and 2) about using OpenType features in programs written by python and .net languages, but didn't get an answer. i realized there is no way to change text rendering engines of operating systems, or force them to use OpenType. so now want to implement my own. such a program that: provides a text engine that receives glyph shapes from otf and ttf files and renders them in sequence of glyphs in text. generates all of OTL features can be used in other parts of applications like controls and components of .NET or python GUI libraries. if python and .net languages are not suitable in this situation, aware me about other programming languages or tools. comments and answers about text rendering system of common Operating Systems, or designing text engines compatible with unicode 5.02 protocol are welcomed.

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• Google maps cluster manager

  - by Prashant

  Hello all I am using google maps in my application. I have to show 100 markers on map. First I prepared a markers array from these markers. When markers are added using addOverlay from markers array, it takes some time and they are being added in some animated way (in sequence). I want all of them to get added to map in a single shot, so no flickering effect. I tried MarkerClusterer but it shows a cluster of markers where the need be. Instead I want all the markers to appear, not a cluster. Only they should be added faster. var point = new GLatLng(latArr[i],lonArr[i]); var marker = new GMarker(point,markerOptions); markers[i] = marker; var markerCluster = new MarkerClusterer(map, markers); Any suggestions please? Thank you.

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• How to extract semi-precise frequencies from a WAV file using Fourier Transforms

  - by Seisatsu

  Let us say that I have a WAV file. In this file, is a series of sine tones at precise 1 second intervals. I want to use the FFTW library to extract these tones in sequence. Is this particularly hard to do? How would I go about this? Also, what is the bast way to write tones of this kind into a WAV file? I assume I would only need a simple audio library for the output. My language of choice is C

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• Neither IE or Firefox respects the control values that are output

  - by Luke Rohde

  I'm writing a survey designer asp.net mvc. It has buttons to move questions up and down. The buttons post the whole form back and the affected questions are swapped on the server. When the form returns the only thing that is changed are the values for each survey question. Both firefox and IE seem to ignore this change. Nothing is persisted to the database (until save) and url doesn't change so the post just returns the same view but I've stepped through my code to ensure the sequence of values being rendered in the view reflects the swap which is ok. However "view - source" doesn't show the change suggesting caching issue (maybe auto complete). I've tried autocomplete="off" in my form. Response.Cache.SetNoStore(); in my global.asax [System.Web.Mvc.OutputCache(NoStore = true, Duration = 0, VaryByParam = "*")] before my controller and the following in my page header NOTHING!!! This must be real common. Anyone got a clue?

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• Looking for a component (.NET or COM/ActiveX) that can play AVI files in a WinForms app

  - by MusiGenesis

  I'm looking for something like the Windows Media Player control that can be hosted on a form. The WMP doesn't work for me because I need a control that can play a continuously-appended playlist of AVI files in sequence, so that the transition from one file to the next happens seamlessly (i.e. without any glitches or pauses in the video and audio). With WMP, there's always a delay between files of half a second or so. Does anyone know of a control (it can be either commercial or open-source) that can do this? I assume anything like this wraps DirectX, and that's OK too.

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• Indy10 Deadlock at TCPServer

  - by user1769184

  to write information on the processing state to the GUI inside a tcpserver.onexecute(..) function , i used the following command sequence ExecuteDUMMYCommand(Global_Send_Record); BitMap_PaintImageProcess; TThread.Synchronize(nil, BitMap_PaintImageProcess); The code is working well on some machines, but on a few it fails. The code execution stops atTThread.Synchronize command. I guess on these machines the function call is trapped inside a deadlock Any chance to figure out the real problem behind ? The procedure BitMap_PaintImageProcess , here I create a Bitmap and do a lot of painting stuff , but is seems that this code is never executed ?

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