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• Is there such a thing as a virtual COM port receipt printer?

  - by Blorgbeard

  I'm debugging some code that writes directly to a COM port in order to print receipts on a receipt printer. The printer model is something like an Epsom TM-88. Instead of printing reams of thermal paper while debugging this code, it would be nice if I could use some kind of virtual printer. Like PDFCreator or FinePrint, but with a virtual COM port instead of a virtual windows printer. Does anyone know of such a thing? Edit: The code sends control characters to get bold text and other formatting. I'd like to see this in the output if possible.

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• help with xpath selecting

  - by fayer

  i've got an id attribute value for an element. i want to select only its children (not all descendants). i used $childElements = $xml-xpath('//entity[@id=212323]'); print_r($childElements); but that would select ALL descendants and print them out. i just want to select the 1 generation children. how could i do that? <entity id=212323> <this>asd</this> <this>asd</this> <this>asd</this> <this> <notThis>asd</notThis> <notThis>asd</notThis> <notThis>asd</notThis> </this> </entity>

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• ASP.NET MVC The new ActionLink with MvcHtmlString and request URL generated

  - by mare

  This piece of code used to work in MVC 1 but it does not since I upgraded to MVC 2: <%=Html.ActionLink(Resources.Localize.Routes_WidgetsCreate, "Create" + "?modal=true", "Widget", null, new { rel = "shadowbox;height=600;width=700", title = Resources.Localize.Routes_WidgetsCreate })%> I am aware it has something to do with the way ActionLink encodes things, so the result that comes out is something like this: "http://localhost:53704/Widget/Create%3fmodal%3dtrue" The problem is, when clicked, the Shadowbox modal opens up and inside, where the request View should be rendered is this exception: Server Error in '/' Application. A potentially dangerous Request.Path value was detected from the client (?). What can I do to get past that? Do you recommend another way of sending params to the view besides in QueryString (in this case I need "modal" because in the view I select CSS styles based on whether we are rendering modal or not)?

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• IE Mixed Content Warining when using https URLs and http:443 URLs?

  - by Campbeln

  I'm getting the good ole' "This page contains both secure and nonsecure items." dialog in IE when connecting to an HTTPS site. No big deal... I've just got something coming in over a non-secure connection so that should be an easy fix, right? So I go into "View Web Page Privacy Policy..." to look to see where I've included an HTTP file, and this is what I see... https://blah/path/to/file.htm https://blah/path/to/file.js http://blah:443/path/to/file.css Um... ok... so... there is an HTTP only URL being requested, but it is going over port 443 ("https://blah/" is shorthand for "http://blah:443/") so... What is the deal with this!? IE 7.0.5730.13 can't possibly be THAT stupid, can it? Is there an IIS setting that needs to be tweaked?

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• Trouble using eval() with cython

  - by Peter Stewart

  I was trying to speed up some code, and then I tried compiling a class and a function using cython and WOW! I havn't measured it yet but it looks at least 10x faster. I first looked at cython just two days ago, I'm very impressed! However, I can't get eval() to work. def thefirst(int a): d = eval('1+2+a') return d I compile this to module1.pyd file and call it with the python file: from module1 import thefirst x = thefirst(2) print x This returns: NameError: name 'a' is not defined. All help is appreciated.

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• gethostname() returns accurate hostname, bind() doesn't like it

  - by user2072848

  Doing a python socket tutorial, entire codebase is as follows import socket as so s = so.socket() host = so.gethostname() port = 12345 s.bind((host, port)) s.listen(5) while True: c, addr = s.accept() print 'Got connection from', addr c.send('Thank you for connecting') c.close() and error message: Traceback (most recent call last): File "server.py", line 13, in <module> s.bind((host, port)) File "/Users/solid*name*/anaconda/lib/python2.7/socket.py", line 224, in meth return getattr(self._sock,name)(*args) socket.gaierror: [Errno 8] nodename nor servname provided, or not known Printing hostname gives me super*name* Which is, in fact, my computer's hostname.

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• AWK :Extract columns from file: Rows have variable columns

  - by pulikot1

  I have a text file in the following format. Each row has variable number of columns. File: gi|269201691|ref|YP_003280960.1| chromosomal replication initiation protein gi|57651109|ref|YP_184912.1| chromosomal replication initiation protein % 1 0.0 2296 100.0 gi|269201692|ref|YP_003280961.1| DNA polymerase III subunit beta gi|57651110|ref|YP_184913.1| DNA polymerase III subunit beta % 1 0.0 1964 100.0 The resulting file should look like the following: gi|269201691|ref|YP_003280960.1| gi|57651109|ref|YP_184912.1| % 1 0.0 2296 100.0 gi|269201694|ref|YP_003280963.1| gi|57651112|ref|YP_184915.1| % 1 0.0 1767 100.0 The code below helps find columns in each row with the pattern 'ref'. awk '{for (i=1;i<=NF;i++) if ($i ~ /ref/) print $i }' Any ideas on how to do the same?

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• How to read special characters from stdin in Python?

  - by erickrf

  I'm having trouble reading special characters from stdin. Here are my attempts: import os dir = raw_input("Dir name: ") Dir name: c:/á os.chdir(dir) WindowsError: [Error 2] The system cannot find the file specified: 'c:/\x81\xe1' Ok, so I tried to get the default system encoding and recode the string from stdin: import locale encoding = locale.getdefaultlocale()[1] print encoding cp1252 unicode(dir, encoding) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "c:\Python26\lib\encodings\cp1252.py", line 15, in decode return codecs.charmap_decode(input,errors,decoding_table) UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 3: character maps to <undefined> Now, I don't know how to solve this. Nor can I understand - why is there a problem when I try to access a directory with a name written in the system default encoding itself??

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• How to Insert a sub string to each line in perl

  - by Nano HE

  Hi, My code as below, How to remove the blank after add hello. to each lines. #!C:\Perl\bin\perl.exe use strict; use warnings; use Data::Dumper; my $fh = \*DATA; #my($line) = $_; while(my $line = <$fh>) { print "Hello.".$line; chomp($line); } __DATA__ Member Information id = 0 name = "tom" age = "20" Output: D:\learning\perl>test.pl Hello.Member Information Hello. id = 0 # i want to remove the blank between Hello. and id Hello. name = "tom" # same as above Hello. age = "20" # same D:\learning\perl>

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• How to Alphabetically retrieve members of a list?

  - by Neoryder

  I have an organization class class Organization { hasMany = [member:Members] } class Members { belongsTo = organization } I'm printing all the members using <ol> <g:each in="${organizationInstance?.members?}" var="m"> <li><g:link controller="members" action="show" id="${m.id}">${m?.encodeAsHTML()}</g:link></li> </g:each> </ol> I want to sort the printing of members so that it would print alphabetically. any ideas?

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• ModelState.AddModelError encodes HTML

  - by NTulip

  Hi I am noticing a weird issue when using ModelState.AddModelError to validate input on my forms. The output from Html.ValidationMessage is not the true HTML value but it's encoded value and so the CSS style is not applied to the error message. Example: private string errorMessage = "<span class=\"negative\">{0}</span><br class=\"hid\" />"; ModelState.AddModelError("title", String.Format(errorMessage, "Tab title is required")); The output is shown as: <span class="field-validation-error">&lt;span class=&quot;negative&quot;&gt;URL is Required&lt;/span&gt;&lt;br class=&quot;hid&quot; /&gt;</span> This didn't use to be the case with their earlier beta's and I am not sure what approach to take here. Thanks Nick

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• updateBinaryStream on ResultSet with FileStream

  - by Lieven Cardoen

  If I try to update a FileStream column I get following error: com.microsoft.sqlserver.jdbc.SQLServerException: The result set is not updatable. Code: System.out.print("Now, let's update the filestream data."); FileInputStream iStream = new FileInputStream("c:\\testFile.mp3"); rs.updateBinaryStream(2, iStream, -1); rs.updateRow(); iStream.close(); Why is this? Table in Sql Server 2008: CREATE TABLE [BinaryAssets].[BinaryAssetFiles]( [BinaryAssetFileId] [int] IDENTITY(1,1) NOT NULL, [FileStreamId] [uniqueidentifier] ROWGUIDCOL NOT NULL, [Blob] [varbinary](max) FILESTREAM NULL, [HashCode] [nvarchar](100) NOT NULL, [Size] [int] NOT NULL, [BinaryAssetExtensionId] [int] NOT NULL, Query used in Java: String strCmd = "select BinaryAssetFileId, Blob from BinaryAssets.BinaryAssetFiles where BinaryAssetFileId = 1"; stmt = con.createStatement(); rs = stmt.executeQuery(strCmd);

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• Using ed to manipulate files matched by find

  - by TheOsp

  Following the bash-hackers wiki's recommendation, I want to edit files using ed. In particular I want to do the following with ed instead of sed: find . -type f -exec sed -i -e 's/a/b/g' {} \; I see that ed doesn't have opt like sed's -e, so as far as I know, pipes and io redirections are the only way to work with it non-interactively. So, using ed from a bash script to do the same as the above sed command would look like: ed file_name <<<$'g/a/s//b/g\nw' Or echo $'g/a/s//b/g\nw' | ed file_name But as far as I know it is impossible to involve pipes or io redirections within find's -exec. Do I miss something? or is the only way to overcome this is to use loops? for file in $(find . -type f -print); do ed $file <<<$'g/a/s//b/g\nw'; done;

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• T-SQL - Date rounding and normalization

  - by arun prakash

  Hi: I have a stored procedure that rounds a column with dates in (yyyy:mm:dd hh:mM:ss) to the nearest 10 minute handle (yyyy:mm:dd hh:mM) 20100303 09:46:3000 ------ 20100303 09:50 but i want to chage it to round it off to the nearest 15 minute handle: 20100303 09:46:3000 ------20100303 09:45 here is my code : IF OBJECT_ID(N'[dbo].[SPNormalizeAddWhen]') IS NOT NULL DROP PROCEDURE [dbo].[SPNormalizeAddWhen] GO CREATE PROCEDURE [dbo].[SPNormalizeAddWhen] As declare @colname nvarchar(20) set @colname='Normalized Add_When' if not exists (select * from syscolumns where id=object_id('Risk') and name=@colname) exec('alter table Risk add [' + @colname + '] datetime') declare @sql nvarchar(500) set @sql='update Risk set [' + @colname + ']=cast(DATEPART(yyyy,[add when]) as nvarchar(4)) + ''-'' + cast(DATEPART(mm,[add when]) as nvarchar(2)) + ''-'' + cast(DATEPART(dd,[add when]) as nvarchar(2)) + '' '' + cast(DATEPART(Hh,[add when]) as nvarchar(2)) + '':'' + cast(round(DATEPART(Mi,[add when]),-1) as nvarchar(2)) ' print @sql exec(@sql) GO

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• Error With Foundation.h

  - by Nathan Campos

  Hello, I learning Objective-C in Linux(Ubuntu), but when i tryed to compile my application that needs the Foundation headers i got an error saying that the file cannot be found, but i have installed the GNUstep development package(gnustep-devel). Here is my code: // Fraction.h #import <Foundation/NSObject.h> @interface Fraction: NSObject { int numerator; int denominator; } - (void) print; - (void) setNumerator: (int) n; - (void) setDenominator: (int) d; - (void) numerator; - (void) denominator; @end And here is the console log: ubuntu@eeepc:~$ gcc main.m -o frac -lobjc In file included from main.m:3: Fraction.h:2:26: error: objc/NSObject.h: No such file or directory In file included from main.m:3: Fraction.h:4: error: cannot find interface declaration for ‘NSObject’, superclass of ‘Fraction’ ubuntu@eeepc:~$ What i need to do?

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• pb with callback in the python optparse module

  - by PierrOz

  Hi Guys, I'm playing with Python 2.6 and its optparse module. I would like to convert one of my arguments to a datetime through a callback but it fails. Here is the code: def parsedate(option, opt_str, value, parser): option.date = datetime.strptime(value, "%Y/%m/%d") def parse_options(args): parser = OptionParser(usage="%prog -l LOGFOLDER [-e]", version="%prog 1.0") parser.add_option("-d", "--date", action="callback", callback="parsedate", dest="date") global options (options, args) = parser.parse_args(args) print option.date.strftime() if __name__ == "__main__": parse_options(sys.argv[1:]) I get an error File: optparse.py in _check_callback "callback not callable". I guess I'm doing something wrong in the way I define my callback but what ? and why ? Can anyone help ?

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• Write data to an xml file.

  - by Bobby

  My aim is to write an XML file with few tags whose values are the regional language. I'm using Python to do this and using IDLE(Pythong GUI) for programming. While I try to write the words in an xmls file it gives the following error. UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-4: ordinal not in range(128) For now, I'm not using any xml writer library instead I'm opening a file "test.xml" and writing the data into it. This error is encountered by the line: f.write("\t\" + data + "\"). If I replace the above write statement with print statement then it prints the data properly on Python Shell. I'm reading the data from an excel file which is not in the UTF8,16, or 32 encoding formats. Its in some other format. cp1252 is reading the data properly. Any help in getting this data writtent oan xml would be highly appreciated. Thanks in advance. Bob

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• Prevent python from printing newline

  - by wrongusername

  I have this code in Python inputted = input("Enter in something: ") print("Input is {0}, including the return".format(inputted)) that outputs Enter in something: something Input is something , including the newline I am not sure what is happening; if I use variables that don't depend on user input, I do not get the newline after formatting with the variable. I suspect Python might be taking in the newline as input when I hit return. How can I make it so that the input does not include any newlines so that I may compare it to other strings/characters? (e.g. something == 'a')

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• very quickly getting total size of folder

  - by freakazo

  I want to quickly find the total size of any folder using python. def GetFolderSize(path): TotalSize = 0 for item in os.walk(path): for file in item[2]: try: TotalSize = TotalSize + getsize(join(item[0], file)) except: print("error with file: " + join(item[0], file)) return TotalSize That's the simple script I wrote to get the total size of the folder, it took around 60 seconds (+-5 seconds). By using multiprocessing I got it down to 23 seconds on a quad core machine. Using the Windows file explorer it takes only ~3 seconds (Right click- properties to see for yourself). So is there a faster way of finding the total size of a folder close to the speed that windows can do it? Windows 7, python 2.6 (Did searches but most of the time people used a very similar method to my own) Thanks in advance.

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• using Control.tabs for prototype.js in Rails

  - by Elliot

  Hey everyone, I've been trying to use http://livepipe.net/control/tabs to get some javascript tabs up and running on my rails up. I'm really just trying to figure out how to install this... and I don't see how I'm running into any issues at all. Here are the steps I've taken: put tabs.js in my scripts folder made sure the layout is including all javascript files then I copied in the code for example 1, as well as the CSS from the page's style sheet. I don't get an error, but it just doesn't work. Both tabs are displayed... Any ideas?

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• ServiceTracker in OSGi r4.1

  - by Schildmeijer

  Im using a org.osgi.util.tracker.ServiceTracker (PrintableServiceTracker implements ServiceTrackerCustomizer and simply prints when a new service is added). Filter filter = bc.createFilter("(objectClass=se.enea.print.Printable)"); tracker = new ServiceTracker(bc, filter, new PrintableServiceTracker(bc)); I've read about "pseudo registration" in the new ebook "OSGi in action" and I wonder if I have to do pseudo registration explicitly or if the framwork handles this automatically? (Will already installed Printable services be caught by the ServiceTracker. will ServiceTracker.addingService(ServiceReference) be called for each of the pre installed Printable services)

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• manage.py not updating database name

  - by ricree

  I have a Django application, and I recently changed the name of the database it is supposed to use. However, manage.py doesn't seem to be using the new database. I've doublechecked the settings.py file, and I've even added a "print settings.DATABASE_NAME" to the manage.py file, and it prints out the correct name, but still connects to the old database. For example, using ./manage.py dbshell: NewDB Password for user : Welcome to psql 8.1.11, the PostgreSQL interactive terminal. OldDB=> So as far as I can see, it's completely ignoring what's in the settings file. What could be causing this?

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• Function for putting all database to an array

  - by jasmine

  I have written a function to print database to an array like this Array( ID=>1, PARENTID =>1, TITLE => LIPSUM, TEXT =>LIPSUM ) My function is: function dbToArray($db) { $allArrays =array(); $query = mysql_query("SELECT * FROM $db"); $dbRow = mysql_fetch_array($query); for ($i=0; $i<count($dbRow) ; $i++) { $allArrays[$i] = $dbRow; } $txt .='<pre>'; $txt .= print_r($allArrays); $txt .= '</pre>'; return $txt; } Anything wrong in my function. Any help is appreciated about my problem. Thanks in advance

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• jQuery: Highlight element under mouse cursor?

  - by Ralph

  I'm trying to create an "element picker" in jQuery, like Firebug has. Basically, I want to highlight the element underneath the user's mouse. Here's what I've got so far, but it isn't working very well: $('*').mouseover(function (event) { var $this = $(this); $div.offset($this.offset()).width($this.width()).height($this.height()); return false; }); var $div = $('<div>') .css({ 'background-color': 'rgba(255,0,0,.5)', 'position': 'absolute', 'z-index': '65535' }) .appendTo('body'); Basically, I'm injecting a div into the DOM that has a semi-transparent background. Then I listen for the mouseover event on every element, then move the div so that it covers that element. Right now, this just makes the whole page go red as soon as you move your mouse over the page. How can I get this to work nicer? Edit: Pretty sure the problem is that as soon as my mouse touches the page, the body gets selected, and then as I move my mouse around, none of the moments get passed through the highligher because its overtop of everything. Firebug Digging through Firebug source code, I found this: drawBoxModel: function(el) { // avoid error when the element is not attached a document if (!el || !el.parentNode) return; var box = Firebug.browser.getElementBox(el); var windowSize = Firebug.browser.getWindowSize(); var scrollPosition = Firebug.browser.getWindowScrollPosition(); // element may be occluded by the chrome, when in frame mode var offsetHeight = Firebug.chrome.type == "frame" ? FirebugChrome.height : 0; // if element box is not inside the viewport, don't draw the box model if (box.top > scrollPosition.top + windowSize.height - offsetHeight || box.left > scrollPosition.left + windowSize.width || scrollPosition.top > box.top + box.height || scrollPosition.left > box.left + box.width ) return; var top = box.top; var left = box.left; var height = box.height; var width = box.width; var margin = Firebug.browser.getMeasurementBox(el, "margin"); var padding = Firebug.browser.getMeasurementBox(el, "padding"); var border = Firebug.browser.getMeasurementBox(el, "border"); boxModelStyle.top = top - margin.top + "px"; boxModelStyle.left = left - margin.left + "px"; boxModelStyle.height = height + margin.top + margin.bottom + "px"; boxModelStyle.width = width + margin.left + margin.right + "px"; boxBorderStyle.top = margin.top + "px"; boxBorderStyle.left = margin.left + "px"; boxBorderStyle.height = height + "px"; boxBorderStyle.width = width + "px"; boxPaddingStyle.top = margin.top + border.top + "px"; boxPaddingStyle.left = margin.left + border.left + "px"; boxPaddingStyle.height = height - border.top - border.bottom + "px"; boxPaddingStyle.width = width - border.left - border.right + "px"; boxContentStyle.top = margin.top + border.top + padding.top + "px"; boxContentStyle.left = margin.left + border.left + padding.left + "px"; boxContentStyle.height = height - border.top - padding.top - padding.bottom - border.bottom + "px"; boxContentStyle.width = width - border.left - padding.left - padding.right - border.right + "px"; if (!boxModelVisible) this.showBoxModel(); }, hideBoxModel: function() { if (!boxModelVisible) return; offlineFragment.appendChild(boxModel); boxModelVisible = false; }, showBoxModel: function() { if (boxModelVisible) return; if (outlineVisible) this.hideOutline(); Firebug.browser.document.getElementsByTagName("body")[0].appendChild(boxModel); boxModelVisible = true; } Looks like they're using a standard div + css to draw it..... just have to figure out how they're handling the events now... (this file is 28K lines long) There's also this snippet, which I guess retrieves the appropriate object.... although I can't figure out how. They're looking for a class "objectLink-element"... and I have no idea what this "repObject" is. onMouseMove: function(event) { var target = event.srcElement || event.target; var object = getAncestorByClass(target, "objectLink-element"); object = object ? object.repObject : null; if(object && instanceOf(object, "Element") && object.nodeType == 1) { if(object != lastHighlightedObject) { Firebug.Inspector.drawBoxModel(object); object = lastHighlightedObject; } } else Firebug.Inspector.hideBoxModel(); }, I'm thinking that maybe when the mousemove or mouseover event fires for the highlighter node I can somehow pass it along instead? Maybe to node it's covering...?

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• Prevent IE users from visiting my site?

  - by Paul Hatcherian

  Internet Explorer has caused me a lot of trouble over the years, between security problems, memory leaks, endless CSS and JavaScript hacks to get my site to look correct, and inconsistencies between releases, I've spent countless hours as the hapless victim of IE's idiosyncrasies. Well that ends today, I've decided to take matters into my own hands and ban all users of IE from visiting my website. That will teach them to use such a cruddy browser. My question is how best to do this? I don't want to rely on JavaScript, which could be disabled, nor the request agent string, which could be tampered with. A clever user could even temporarily switch to Firefox or Chrome just to visit my site. Ideally, I'd have a list of the IP addresses of every IE user in the world and restrict based on the IP address. The main problem I'm having, aside from getting the list in the first place, is how do I keep it updated? Thanks!

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