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  • sorting content of a text file in python

    - by rabidmachine9
    I have this small script that sorts the content of a text file # The built-in function `open` opens a file and returns a file object. # Read mode opens a file for reading only. try: f = open("tracks.txt", "r") try: # Read the entire contents of a file at once. # string = f.read() # OR read one line at a time. #line = f.readline() # OR read all the lines into a list. lines = f.readlines() lines.sort() f = open('tracks.txt', 'w') f.writelines(lines) # Write a sequence of strings to a file finally: f.close() except IOError: pass the only problem is that the text is displayed at the bottom of the text file everytime it's sortened... I assume it also sorts the blank lines...anybody knows why? thanks in advance

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  • Does replacing statements by expressions using the C++ comma operator could allow more compiler opti

    - by Gabriel Cuvillier
    The C++ comma operator is used to chain individual expressions, yielding the value of the last executed expression as the result. For example the skeleton code (6 statements, 6 expressions): step1; step2; if (condition) step3; return step4; else return step5; May be rewritten to: (1 statement, 6 expressions) return step1, step2, condition? step3, step4 : step5; I noticed that it is not possible to perform step-by-step debugging of such code, as the expression chain seems to be executed as a whole. Does it means that the compiler is able to perform special optimizations which are not possible with the traditional statement approach (specially if the steps are const or inline)? Note: I'm not talking about the coding style merit of that way of expressing sequence of expressions! Just about the possible optimisations allowed by replacing statements by expressions.

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  • DbMetal chokes on repeated foreign key references in SQLite - any ideas?

    - by DanM
    I've been struggling to get DbMetal to process my SQLite database. I finally isolated the problem. It won't allow a table to have two foreign key references to the same column. For example, a SQLite database with these two tables will fail: CREATE TABLE Person ( Id INTEGER PRIMARY KEY, Name TEXT NOT NULL ); CREATE TABLE Match ( Id INTEGER PRIMARY KEY, WinnerPersonId INTEGER NOT NULL REFERENCES Person(Id), LoserPersonId INTEGER NOT NULL REFERENCES Person(Id) ); I get this error: DbMetal: Sequence contains more than one matching element If I get rid of the second foreign key reference, no error occurs. So, this works: CREATE TABLE Match ( Id INTEGER PRIMARY KEY, WinnerPersonId INTEGER NOT NULL REFERENCES Person(Id), LoserPersonId INTEGER NOT NULL ); But I really need both "person" columns to reference the person table. I submitted a bug report for this, but I could use a workaround in the meantime. Any ideas?

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  • How to tell if linux disk IO is causing excessive (> 1 second) application stalls

    - by noahz
    I have a Java application performing a large volume (hundreds of MB) of continuous output (streaming plain text) to about a dozen files a ext3 SAN filesystem. Occasionally, this application pauses for several seconds at a time. I suspect that something related to ext3 vsfs (Veritas Filesystem) functionality (and/or how it interacts with the OS) is the culprit. What steps can I take to confirm or refute this theory? I am aware of iostat and /proc/diskstats as starting points. Revised title to de-emphasize journaling and emphasize "stalls" I have done some googling and found at least one article that seems to describe behavior like I am observing: Solving the ext3 latency problem Additional Information Red Hat Enterprise Linux Server release 5.3 (Tikanga) Kernel: 2.6.18-194.32.1.el5 Primary application disk is fiber-channel SAN: lspci | grep -i fibre 14:00.0 Fibre Channel: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter (rev 03) Mount info: type vxfs (rw,tmplog,largefiles,mincache=tmpcache,ioerror=mwdisable) 0 0 cat /sys/block/VxVM123456/queue/scheduler noop anticipatory [deadline] cfq

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  • Can this be done using Facebook Connect?

    - by SLoret
    Here is the sequence of events I would like to see happen: Visitor shows up to my site and clicks the connect button Visitor authorizes the connection by logging into their facebook account My site records their authorization My site posts to their wall "Sally just joined http://foo.com. A website about foo." Much later, my site can post other updates to the users wall using the stored authorization from step 3. Sally doesn't have to be actively on my site at the time this post to their wall happens. Thanks in advance.

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  • Regular expressions and matching URLs with metacharacters

    - by James P.
    I'm having trouble finding a regular expression that matches the following String. Korben;http://feeds.feedburner.com/KorbensBlog-UpgradeYourMind?format=xml;1 One problem is escaping the question mark. Java's pattern matcher doesn't seem to accept \? as a valid escape sequence but it also fails to work with the tester at myregexp.com. Here's what I have so far: ([a-zA-Z0-9])+;http://([a-zA-Z0-9./-]+);[0-9]+ Any suggestions? Edit: The original intent was to match all URLs that could be found after the first semi colon.

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  • Is this XSLT correct for the XML file which I have developed?

    - by atrueguy
    This is my XML file. I need to develop a xslt for this. <?xml version="1.0" encoding="ISO-8859-1"?> <!--<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">--> <!-- Generator: Arbortext IsoDraw 7.0 --> <svg width="100%" height="100%" viewBox="0 0 214.819 278.002"> <g id="Standard_x0020_layer"/> <g id="Catalog"> <line stroke-width="0.353" stroke-linecap="butt" x1="5.839" y1="262.185" x2="209.039" y2="262.185"/> <text transform="matrix(0.984 0 0 0.93 183.515 265.271)" stroke="none" fill="#000000" font-family="'Helvetica'" font-size="3.174">© 2009 k Co.</text> <text transform="matrix(0.994 0 0 0.93 7.235 265.3)" stroke="none" fill="#000000" font-family="'Helvetica'" font-size="3.174">087156-8-</text> <text transform="matrix(0.995 0 0 0.93 21.708 265.357)" stroke="none" fill="#000000" font-family="'Helvetica'" font-size="3.174" font-weight="bold">AB</text> <path stroke-width="0.088" stroke-linecap="butt" stroke-dasharray="2.822 1.058" d="M162.037 107.578L174.439 100.417L180.698 104.03"/> <g id="AUTOID_20445" class="52971"> <line stroke-width="0.088" stroke-linecap="butt" x1="68.859" y1="43.621" x2="65.643" y2="45.399"/> <text transform="matrix(0.944 0 0 0.93 69.165 43.356)" stroke="none" fill="#000000" font-family="'Helvetica'" font-size="2.775" font-weight="bold">52971</text> </g> </g> </svg> I have developed a XSLT for this in this way, but I am failing to produce the desired output can any one help me in this. <?xml version="1.0" encoding="ISO-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:svg="http://www.w3.org/2000/svg"> <xsl:template match="/"> <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"> <fo:layout-master-set> <fo:simple-page-master master-name="simple" page-height="11in" page-width="8.5in"> <fo:region-body margin="0.7in" margin-top="1.15in" margin-left=".8in"/> <fo:region-before extent="1.5in"/> <fo:region-after extent="1.5in"/> <fo:region-start extent="1.5in"/> <fo:region-end extent="1.5in"/> </fo:simple-page-master> </fo:layout-master-set> <fo:page-sequence master-reference="simple"> <fo:flow flow-name="xsl-region-body"> <fo:block> <fo:instream-foreign-object> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" height="100%" width="100%" viewBox="0 0 214.819 278.002"> <xsl:for-each select="svg/g"> <svg:g style="stroke:none;fill:#000000;"> <svg:path> <xsl:variable name="s"> <xsl:value-of select="translate(@d,' ','')"/> </xsl:variable> <xsl:attribute name="d"><xsl:value-of select="translate($s,',',' ')"/></xsl:attribute> </svg:path> </svg:g> </xsl:for-each> <xsl:for-each select="svg/g"> <svg:line x1 = "{$x1}" y1 = "{$y1}" x2 = "{$x2}" y2 = "{$y2}" style = "stroke-width: 0.088; stroke: black;"/> <line xmlns="http://www.w3.org/2000/svg" x1="{$x1}" y1="{$y1}" x2="{$x2}" y2="{$y2}" stroke-width="0.088" stroke="black" fill="#000000" /> </xsl:for-each> </svg:svg> </fo:instream-foreign-object> </fo:block> </fo:flow> </fo:page-sequence> </fo:root> </xsl:template> </xsl:stylesheet> Please help me in this

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  • Advice for migrating email server

    - by Chris Adams
    Hi there, I'm planning to migrate a Zimbra server with about 200gb of data from a server hosted in an office into a datacentre, to increase uptime (we've had a couple of outages when our network here started flaking out, and we have people in other countries relying on this server too). However, I'm not sure how best to migrate the data into the data centre without rendering the connection unusable during office hours, because there's far too much to send in over night over the two meg upstream connection we have here. I'm familiar with using tools like nice to stop a long running process degrading machine performance - is there a simple way to throttle a connection between office hours, so the long running transfer doesn't block the pipe, but then opens up outside of office hours to make the most of the bandwidth? I'm aware the alternative here is to simply mail a hard drive to the data centre, but I'd like to avoid doing that if I could. We're using Centos Linux for our servers, in the office and the datacentre, so extra points for an open source linux answer.

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  • windows 64bit problem

    - by renad
    hi there, I have developed a windows application using C# VS 2008 and Sql 2005 express, i have testes the application on my machine and it works fine, my machine is win32 bit, when i tried the application on windows 64bit it keeps giving me an error message on the start of the application,although i installed the sql express on that machine but should i install .NETframwork3.5sp1 64 bit also? , the target machine is widows 7 64bit, also is there a technology or a way to make the application work in the following sequence: 1- the CD is auto run 2- the setup checks for the installed prerequists and install any necessery one without the interference of the user. one last question,should i rebuild the application on an 64 bit machine to make it work on 64 bit machine? thankx

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  • MS Access Mark Duplicates in order of appearance - using the function RankOfDup: (SELECT Count(*) ...)

    - by veska stoyanova
    I'm trying to create Ranking that shows the sequence of agreements for the two fields Customers and Agreements. The number for agreements must be unique, whereas customers can repeat. The formula RankOfDup: (SELECT Count(*) FROM Data a WHERE a.customer=Data.customer And a.agreement >= Data.agreement) Works beautifully but after this query with columns Agreement, Customer and RankofDup, I need to create crosstab that transposes the RankofDub. It works when I make the table first and then create query but my data is too large so I'm trying to put the select query with the ranking in a crosstab query. However, when I try to do this Access gives error message that microsoft jet ... doesn't recognise Data.customer? Any ideas how I can fix this?

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  • Can only access asp.net app on localhost

    - by Kevin Donn
    I'm trying to get an asp.net application up on IIS on a Windows Server 2008 machine. I can hit the app from localhost, no problem. But I can't access the app using the server's domain name either locally or from another machine on the network. But here's the odd part. I can access a normal file on IIS using the domain name, both from a browser running on the server and from a browser running on another machine on the network. Here's a synopsis ("http" converted to "htp" below because I don't have enough points to have all these links in my message): From IE on the server itself: works htp://localhost/foo.htm works htp://localhost/App works htp://test.foo.com/foo.htm dead htp://test.foo.com/App From IE on another machine (inside or outside my subnet): works htp://test.foo.com/foo.htm dead htp://test.foo.com/App And when I say "dead" I mean the request times out. Any ideas?

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  • Windows 2008 R2 Task Scheduler triggered an event for unknown reasons.

    - by Mike
    Today I arrived at the office only to find that a task, which was scheduled to trigger at 5:30PM EST each Friday, had triggered on its own at 6:01AM EST this morning. I checked the event logs as well as the task schedule log and all of the evidence points to a timed trigger starting this task with the correct credentials, however the task history reports the task has not been triggered since last Friday when it ran to completion successfully. I do not have this task set to random start times or start if missed. This is the first time I have observed this happen in the Windows Task Scheduler and want to know if anyone else has come across this, why it happened and how to fix it?

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  • 50 sequences in one line

    - by user343934
    I have Muttiple sequence alignment (clustal) file and i want to read this file and arrange sequences in a such a way that in looks more clear and precise in order. I am doing this from biopython using AlignIO object. My codes like this alignment = AlignIO.read("opuntia.aln", "clustal") print "Number of rows: %i" % len(align) for record in alignment: print "%s - %s" % (record.id, record.seq) My Output-- http://i48.tinypic.com/ae48ew.jpg , it looks messy and long scrolling. What i want to do is print only 50 sequences in each line and continue till the end of alignment file. I wish to have output like this---http://i45.tinypic.com/4vh5rc.jpg from --http://www.ebi.ac.uk/Tools/clustalw2/, sorry two links are just a text due to my reputation. Any suggestions, algorithm and sample code is appreciated Thanks in advance Br,

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  • What are the advantages of DKIM?

    - by duff
    After making my server sign outgoing email I started to wonder what the benefits are. This is the opposite of a previously asked question. Naively I see two benefits: We can throw away all emails which don’t carry a valid signature: Wrong! Mail forwarders (like Mailman) will produce emails from someone at «domain which signs» which are not signed correctly (in their forwarded shape). We can skip spam checking on signed email: Wrong! A spammer can send a single email through e.g. gmail.com and then resend that email as-is (w/o changing headers) to a million people. So what are the selling points of DKIM?

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  • Deactivating website in ISPConfig shows another site

    - by Mattias
    A long time ago, one of our clients setup a subdomain pointing to our ip-adress. We added a website (SitesWebsiteAdd new website) that points to one of our servers. The project is now closed and the client wants us to remove the content. When we deactivate (by unclicking active) this site it automatically defaults to another website we have in our list (!?). So, because the client is still pointing to our ip, when entering project.client.com another client project is showing up by default. How is this possible? Any suggestions? I can ofcourse give you guys more details when you tell me what details you need. Thanks

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  • Using XSD file in VS2005

    - by xt_20
    Hello all I want to write an XML file. I have created an XSD file named XMLSchema.xsd, and run the command 'xsd /c XMLSchema.xsd' which generated a c# class file. Now, how do I use this file to generate XML files? Part of my code: <?xml version="1.0" encoding="utf-8"?> <xs:schema id="XMLSchema" targetNamespace="http://tempuri.org/XMLSchema.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/XMLSchema.xsd" > <xs:element name="root"> <xs:complexType> <xs:sequence> <xs:element name="Audit"> <xs:complexType> ... which generates a c# class 'root'. How do I call 'root' from my C# web program? Thanks

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  • wildcard in httpd conf file?

    - by Joe
    Here is an example httpd config I'm currently using: <VirtualHost 123.123.123.123:80> ServerName mysite.com ServerAlias www.mysite.com DocumentRoot /home/folder </VirtualHost> I'm wondering, is it possible to have a wildcard for the ServerName & ServerAlias variable? Reason for asking is I have some software that is shared among multiple URL's all controlled in a CMS and it's kind of a pain to add new domains via ssh everytimee. And before someone points out a security hole, the software does check the current URL before doing any webpages :)

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  • What is the best data structure and algorithm for comparing a list of strings?

    - by Chiraag E Sehar
    I want to find the longest possible sequence of words that match the following rules: Each word can be used at most once All words are Strings Two strings sa and sb can be concatenated if the LAST two characters of sa matches the first two characters of sb. In the case of concatenation, it is performed by overlapping those characters. For example: sa = "torino" sb = "novara" sa concat sb = "torinovara" For example, I have the following input file, "input.txt": novara torino vercelli ravenna napoli liverno messania noviligure roma And, the output of the above file according to the above rules should be: torino novara ravenna napoli livorno noviligure since the longest possible concatenation is: torinovaravennapolivornovilligure Can anyone please help me out with this? What would be the best data structure for this?

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  • How to detect pending system shutdown on Linux?

    - by Rajorshi
    Hi, I am working on an app where I need to detect system shutdown. However, I have not found any reliable way get a notification on this event. I know that on shutdown, my app will receive a SIGTERM signal followed by a SIGKILL. What I want to know is if there is someway to query if a SIGTERM is part of a shutdown sequence? Does any one know if there is a way to query that programmatically (C API)? As far as I know, the system does not provide any other method to query for an impending shutdowm. If it does, that would solve my problem as well. I have been trying out runlevels as well, but change in runlevels seem to be instantaneous and without any prior warnings.

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  • Find and replace text in a string using C#

    - by Joey Morani
    Anyone know how I would find & replace text in a string? Basically I have two strings: string firstS = "/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABQODxIPDRQSERIXFhQYHzMhHxwcHz8tLyUzSkFOTUlBSEZSXHZkUldvWEZIZoxob3p9hIWET2ORm4+AmnaBhH//2wBDARYXFx8bHzwhITx/VEhUf39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f3//"; string secondS = "abcdefg2wBDABQODxIPDRQSERIXFh/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/abcdefg"; I want to search firstS to see if it contains any sequence of characters that's in secondS and then replace it. It also needs to be replaced with the number of replaced characters in squared brackets: [NUMBER-OF-CHARACTERS-REPLACED] For example, because firstS and secondS both contain "2wBDABQODxIPDRQSERIXFh" and "/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/f39/" they would need to be replaced. So then firstS becomes: string firstS = "/9j/4AAQSkZJRgABAQEAYABgAAD/[22]QYHzMhHxwcHz8tLyUzSkFOTUlBSEZSXHZkUldvWEZIZoxob3p9hIWET2ORm4+AmnaBhH//2wBDARYXFx8bHzwhITx/VEhUf39[61]f3//"; Hope that makes sense. I think I could do this with Regex, but I don't like the inefficiency of it. Does anyone know of another, faster way?

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  • How to use File History with Recovery partition?

    - by Karl
    I formatted the recovery partition right after installing Windows 8. I'm curious as to why File history only allow the use of external HDD. Instead of using the Recovery Partition. I can't find a way to use it. I decided to use it exclusively for Restore Points. Is there any way to make the Recovery Partition exclusively for the use of File History? Or should I use 3rd Party programs instead, (Easeus Todo Backup, Macrium Reflect, etc)?

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  • modprobe ndiswrapper - not found

    - by David
    I'm trying to use ndiswrapper on a Slackware 12 (I think) box, but I'm running into a problem with modprobe. Everything I find online says that it should be working, but for some unknown reason it isn't. Here's what I've done so far: Installed ndiswrapper (latest tarball, make, make install) Ran ndiswrapper -i on the WinXP driver for my USB wireless card Ran ndiswrapper -l which tells me the driver is present and the device is present (lsusb also confirms the device is present) Ran ndiswrapper -m which put an alias for wlan0 in /etc/modprobe.d/ndiswrapper.conf Ran depmod -a Ran modprobe ndiswrapper which tells me "FATAL: module ndiswrapper not found" Ran modprobe -l which shows no listing for ndiswrapper I even tossed in a reboot or two while trying various combinations of the above, still nothing. So naturally ifconfig wlan0 up isn't working because the device isn't being created, presumably because the module isn't loading the driver. Does anybody have any suggestions? Everything points to the notion that this should work fine, but modprobe just isn't able to find what it needs. Have I missed an important step?

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  • Using MonadPlus in FRP.Reactive.FieldTrip

    - by ony
    I'm studying FRP at this moment through FieldTrip adaptor. And hit the problem with strange way of frames scheduling and integration. So now I'm trying to build own marker Event for aligning Behaviour stepping. So... flipflop :: Behavior String flipflop = stepper "none" (xflip 2) where xflip t0 = do t <- withTimeE_ (atTime t0) return "flip" `mplus` xflop (t+3) xflop t0 = do t <- withTimeE_ (atTime t0) return "flop" `mplus` xflip (t+2) txtGeom = ((uscale2 (0.5::Float) *%) . utext . show <$>) main = anim2 (txtGeom . pure flipflop) Questions is: Why this example leads to memory leak? Is there safe way to build sequence of events where each next one is scheduled depending on previous?

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  • How to pass an xpath into an xquery function declaration

    - by topmulch
    Hi all, I use Apache Tomcat's Exist DB as an XML database and am trying to construct a sequence by passing the following xpath, defined in FLWOR's 'let' clause: $xpath := $root/second/third into a locally defined function declaration, like so: declare function local:someFunction($uuid as xs:string?, $xpath as xs:anyAtomicType?) { let $varOne := $xpath/fourth[@uuid = $uuid]/fifthRight let $varTwo := $xpath/fourth[@uuid = $uuid]/fifthLeft let $combined := ($varOne,$varTwo) return $combined }; Of course, when entering this in the exist xquery sandbox, I get Type: xs:anyAtomicType is not defined. What should I use in place of it, or should I do this a different way? Thanks in advance for any suggestions.

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  • Conditionally set a column to its default value in Postgres

    - by Evgeny
    I've got a PostgreSQL 8.4 table with an auto-incrementing, but nullable, integer column. I want to update some column values and, if this column is NULL then set it to its default value (which would be an integer auto-generated from a sequence), but I want to return its value in either case. So I want something like this: UPDATE mytable SET incident_id = COALESCE(incident_id, DEFAULT), other = 'somethingelse' WHERE ... RETURNING incident_id Unfortunately, this doesn't work - it seems that DEFAULT is special and cannot be part of an expression. What's the best way to do this?

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