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• Ruby File IO question; Maintain file read position between script executions

  - by macek

  I have two files a.txt and b.txt (henceforth a and b). My script iterates through a, does some operation, and potentially inserts a line to b. In the event the script stops, I need it to pick up where it left off. In the example below: foo was copied to b bar was copied to b zim was not copied to b (did not pass some criteria) gaz was copied to b Script stops (for whatever reason) When script starts again, how to open a and start on line "dib"? a.txt foo bar zim gaz // <= last successful copy dib // <= I want to start here on next script execution gir b.txt foo bar gaz // <= note omission of "zim" above gaz

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• ActionScript find LineBreak in XML and count them

  - by Pepe Sanchez

  Hi, i have an XML that has line breaks like this: This is a text that has line breaks im reading that xml in action script.. and trying to count how many linebreaks are in the text. Here is my code.. it returns 0 , it should return 5 for the example. function countBreaks(str:String) : Number { var count:Number = 0; for (var i:Number = 0; i < str.length-1; i++) { if(str.charAt(i)+str.charAt(i+1) eq "\n") count++; } return count; } I appreciate any help :)

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• How does this C# asp.net random password code work?

  - by quakkels

  Hello all, I'm new to .NET and C# and I'm trying to figure out how this code works: public static string CreateRandomPassword(int PasswordLength) { String _allowedChars = "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ23456789"; Byte[] randomBytes = new Byte[PasswordLength]; RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(); rng.GetBytes(randomBytes); char[] chars = new char[PasswordLength]; int allowedCharCount = _allowedChars.Length; for(int i = 0;i<PasswordLength;i++) { /// /// I don't understand how this line works: /// chars[i] = _allowedChars[(int)randomBytes[i] % allowedCharCount]; } return new string(chars); } I think I've got a pretty good handle on most of this. I haven't been able to understand the following line: chars[i] = _allowedChars[(int)randomBytes[i] % allowedCharCount]; I understand that the code generates random binary numbers and uses those random numbers in the for loop to select a character from the _allowedChars string. What I don't get is why this code uses the modulous operator (%) to get the _allowedChars index value. Thanks for any help

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• How do I switch to a SQL Server Server Database that will exist after another command?

  - by Jason Young

  I can't get this script to run, because SQL management studio 2008 says the table "NewName" does not exist. However, the script's purpose is to rename an existing database, so that it does exist when it gets to that line. Ideas? Use Master; ALTER DATABASE OldName SET SINGLE_USER WITH NO_WAIT; ALTER DATABASE OldName MODIFY NAME = NewName; ALTER DATABASE NewName SET MULTI_USER; Use NewName; --THIS LINE FAILS BEFORE THE SCRIPT EVEN RUNS!

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• Counting the number of characters in a file

  - by Kat

  I'm writing a program that for one part asks for the program to print how many characters (including whitespaces) are in a file. The code I have right now though returns 0 every time though and I'm not sure why it isn't counting the characters. public int getcharCount(Scanner textFile) { int count = 0; while(textFile.hasNext()) { String line = textFile.nextLine(); for(int i=0; i < line.length(); i++) count++; } return count; }

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• Python: saving objects and using pickle. Error using pickle.dump

  - by Peterstone

  Hello I have an Error and I don´t the reason: >>> class Fruits:pass ... >>> banana = Fruits() >>> banana.color = 'yellow' >>> banana.value = 30 >>> import pickle >>> filehandler = open("Fruits.obj",'w') >>> pickle.dump(banana,filehandler) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Python31\lib\pickle.py", line 1354, in dump Pickler(file, protocol, fix_imports=fix_imports).dump(obj) TypeError: must be str, not bytes >>> I don´t know how to solve this error because I don´t understand it. Thank you so much.

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• SH/BASH - Scan a log file until some text occurs, then exit. How??

  - by James

  Current working environment is OSX 10.4.11. My current script: #!/bin/sh tail -f log.txt | while read line do if echo $line | grep -q 'LOL CANDY'; then echo 'LOL MATCH FOUND' exit 0 fi done It works properly the first time, but on the second run and beyond it takes 2 occurrences of 'LOL CANDY' to appear before the script will exit, for whatever reason. And although I'm not sure it is specifically related, there is the problem of the "tail -f" staying open forever. Can someone please give me an example that will work without using tail -f? If you want you can give me a bash script, as OSX can handle sh, bash, and some other shells I think.

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• Importing Python module from the Bash

  - by Morlock

  I am launching a Python script from the command line (Bash) under Linux. I need to open Python, import a module, and then have lines of code interpreted. The console must then remain in Python (not quit it). How do I do that? I have tried an alias like this one: alias program="cd /home/myname/programs/; python; import module; line_of_code" But this only starts python and the commands are not executed (no module import, no line of code treated). What is the proper way of doing this, provided I need to keep Python open (not quit it) after the script is executed? Many thanks.

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• how to manually deploy a web service on tomcat 6?

  - by opensas

  I'm learning how to develop soap web services with java. So far now I've been following this excelente tutorial http://java.sun.com/developer/technicalArticles/J2SE/jax_ws_2/ it all goes well, I have my web service working from the command line with it's embeded server, and then, with the help of netbeans I deployed it on tomcat. I'd like to know the steps to manually deploy it on tomcat, in order to learn how it's done, and because I don't like depending on an ide. I mean, I'd like to know how everything could be done from the command line and a text editor. I've also found this link that explains how to manually deploy a servlet to tomcat, http://linux-sxs.org/internet_serving/c292.html but I couldn't find any article telling how to deploy a web service... thanks a lot saludos sas

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• firefox window.onerror event problem - alerts "Script error!" only

  - by powerboy

  I use the window.onerror to alert javascript errors for debugging. window.onerror = function(msg, url, line) { alert(msg + '\nLine: ' + line); }; When an error is fired, it can alert this actual error message in IE. But in firefox, it just alerts "Script error!", but I can still see the actual error message in firefox's error console. I remembered several months ago when I worked on another project, firefox did not work like this. But I cannot get the code of that project currently. So I wonder what are the possible problems with this?

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• PyQt4: Why does Python crash on close when using QTreeWidgetItem?

  - by Rini

  I'm using Python 3.1.1 and PyQt4 (not sure how to get that version number?). Python is crashing whenever I exit my application. I've seen this before as a garbage collection issue, but this time I'm not sure how to correct the problem. This code crashes: import sys from PyQt4 import QtGui class MyWindow(QtGui.QMainWindow): def __init__(self, parent=None): QtGui.QMainWindow.__init__(self, parent) self.tree = QtGui.QTreeWidget(self) self.setCentralWidget(self.tree) QtGui.QTreeWidgetItem(self.tree) # This line is the problem self.show() app = QtGui.QApplication(sys.argv) mw = MyWindow() sys.exit(app.exec_()) If I remove the commented line, the code exits without a problem. If I remove the 'self.tree' parent from the initialization, the code exits without a problem. If I try to use self.tree.addTopLevelItem, the code crashes again. What could be the problem?

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• Explain JAVA code

  - by MIW

  I need some help to explain the meaning from line 5 to line 9. Thanks String words = "Rain Rain go away"; String mutation1, mutation2, mutation3, mutation4; mutation1 = words.toUpperCase(); System.out.println ("** " + mutation1 + " Nursery Rhyme **"); mutation1 = words.concat ("\nCome again another day"); mutation2 = "Johnny Johnny wants to play"; mutation3 = mutation2.replace (mutation2.charAt(5), 'i'); mutation4 = mutation3.substring (7, 27); System.out.print ("\'" + mutation1 + "\n" + mutation4 + "\'\n"); 10.System.out.println ("Title length: " + words.length());

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• Problem with passing data to view in codeigniter code.

  - by Jagira

  Hello, I have a codeigniter code that is working on local Apache installation. But it does not work on Godaddy Hosting. I have got other similar views and controllers which are working on Godaddy. Following is the code. I have pasted only relevant code. Controller: function index() { $this-load-model('Feedmodel'); $data['posts']=$this-Feedmodel-gethomedata(); $this-load-view('home',$data); } View: Total ' .$post['title'].''; ? The error that I am getting is A PHP Error was encountered Severity: Notice Message: Undefined variable: posts Filename: views/home.php Line Number: 59 A PHP Error was encountered Severity: Warning Message: Invalid argument supplied for foreach() Filename: views/home.php Line Number: 59

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• Adding Images to an ASP .Net Chart Control

  - by wali

  Hello all! I'm not sure if I titled the question correctly so it would be better if I explained what I'm trying to do. I am using the ASP .Net Chart Control to create a line chart showing numbers of trouble calls based on date. What I would like to do is implement a way of annotating the chart with data whereas if there was a spike in trouble calls a line, or asterisk, etc would direct the viewer to "read notes below for an explanation for why the numbers spiked here". From the samples for the chart control there is a way you can add a bitmap to the chart, however I don't see how that will be effective here because the explanations will come dynamically from a database. If anyone's done something like this or has some guidance I'd appreciate it. Thanks!

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• WxPython Incompatible With Snow Leopard?

  - by Alex

  Hello all, Recently I upgraded to Snow Leopard, and now I can't run programs built with wxPython. The errors I get are (from Eclipse + PyDev): import wx File "/var/tmp/wxWidgets/wxWidgets-13~231/2.6/DSTROOT/System/Library/Frameworks /Python.framework/Versions/2.6/Extras/lib/ python/wx-2.8-mac-unicode/wx/__init__.py", line 45, in <module> File "/var/tmp/wxWidgets/wxWidgets-13~231/2.6/DSTROOT /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib /python/wx-2.8-mac-unicode/wx/_core.py", line 4, in <module> ImportError:/System/Library/Frameworks /Python.framework/Versions/2.6/Extras/lib/python /wx-2.8-mac-unicode/wx/_core_.so: no appropriate 64-bit architecture (see "man python" for running in 32-bit mode) I don't really understand them and would appreciate if you could help me to do so, also, if you do know what's going on, how can I go about fixing them? Maybe this has something to do with the fact that Snow Leopard is 64-bit? Thanks!!

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• Can't declare even the most simple class in PHP - Am I going insane?

  - by Phil

  I'm getting this error whenever I attempt to declare a class: Parse error: syntax error, unexpected T_VARIABLE, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /home3/foundloc/public_html/booka/page2.php on line 7 (line 7 is the class declaration by the way). Here's the incredibly simple class I am attempting to declare: Class abc { $a = “Hello!”; } Is there some setting on PHP that i need to turn on? I feel like this is one of those 'did you check if the TV is plugged in' type of issues....

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• Access event.target in IE8 unobstrusive Javascript

  - by Mirko

  The following function gets the target element in a dropdown menu: function getTarget(evt){ var targetElement = null; //if it is a standard browser if (typeof evt.target != 'undefined'){ targetElement = evt.target; } //otherwise it is IE then adapt syntax else{ targetElement = evt.srcElement; } //return id of element when hovering over or if (targetElement.nodeName.toLowerCase() == 'li'){ return targetElement; } else if (targetElement.parentNode.nodeName.toLowerCase() == 'li'){ return targetElement.parentNode; } else{ return targetElement; } Needless to say, it works in Firefox, Chrome, Safari and Opera but it does not in IE8 (and I guess in previous versions as well). When I try to debug it with IE8 I get the error "Member not Found" on the line: targetElement = evt.srcElement; along with other subsequent errors, but I think this is the key line. Any help will be appreciated.

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• MPMediaickerController memory leak

  - by Joe

  This is code from Apple's Addmusic example. MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeMusic]; picker.delegate = self; picker.allowsPickingMultipleItems = YES; picker.prompt = NSLocalizedString (@"Add songs to play", "Prompt in media item picker"); // The media item picker uses the default UI style, so it needs a default-style // status bar to match it visually [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleDefault animated: YES]; [self presentModalViewController: picker animated: YES]; [picker release]; I'm using this code in my app and the Leaks instrument highlights a leak on the line: [self presentModalViewController: picker animated: YES]; I think that this is because this line retains a reference to picker which cannot be subsequently released. Is there any way around this?

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• What is the maximum distance from an anchor point to a bezier curve?

  - by drawnonward

  Given a cubic bezier curve P0,P1,P2,P3 with the following properties: • Both P1 and P2 are on the same side of the line formed by P0 and P3. • P2 can be projected onto the line segment formed by P0 and P3 but P1 cannot. What is the T value for the point on the curve farthest from P3? Here is an image with an example curve. The curve bulges on the left, so there is a point on the curve farther from P3 than P0. I found this reference for finding the minimum distance from an arbitrary point to a curve. Is trial and error the only way to solve for maximum distance as well? Does it make any difference that the point is an anchor on the curve? Thanks

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• Can .NET load and parse a properties file equivalent to Java Properties class?

  - by Tai Squared

  Is there an easy way in C# to read a properties file that has each property on a separate line followed by an equals sign and the value, such as the following: ServerName=prod-srv1 Port=8888 CustomProperty=Any value In Java, the Properties class handles this parsing easily: Properties myProperties=new Properties(); FileInputStream fis = new FileInputStream (new File("CustomProps.properties")); myProperties.load(fis); System.out.println(myProperties.getProperty("ServerName")); System.out.println(myProperties.getProperty("CustomProperty")); I can easily load the file in C# and parse each line, but is there a built in way to easily get a property without having to parse out the key name and equals sign myself? The C# information I have found seems to always favor XML, but this is an existing file that I don't control and I would prefer to keep it in the existing format as it will require more time to get another team to change it to XML than parsing the existing file.

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• How to get ouput from expect

  - by Mallikarjunarao

  i wrote a script for spawing the bc command package require Expect proc bc {eq} { spawn e:/GnuWin32/bc/bin/bc send "$eq\r" expect -re "(.*)\r" return "$expect_out(0,string)" } set foo "9487294387234/sqrt(394872394879847293847)" puts "the valule [bc $foo]" how to get the output from this. When i am running this one i get ouput like this bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc. This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'. 9487294387234/sqrt(394872394879847293847) 477 can't read "expect_out(0,string)": no such element in array while executing "return "The values is $expect_out(0,string)"" (procedure "bc" line 6) invoked from within "bc $foo" invoked from within "puts "the valule [bc $foo]"" (file "bc.tcl" line 21) how to resolve this one.

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• How do i launch a process with low priority? C#

  - by acidzombie24

  I want to execute a cmd line tool to process data. It does not need to be blocking. I want it to be low priority. So i wrote the below Process app = new Process(); app.StartInfo.FileName = @"bin\convert.exe"; app.StartInfo.Arguments = TheArgs; app.PriorityClass = ProcessPriorityClass.BelowNormal; app.Start(); However i get a System.InvalidOperationException with the msg "No process is associated with this object." Why? how do i properly launch this app in low priority? PS: Without the line app.PriorityClass = ProcessPriorityClass.BelowNormal; the app runs fine.

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• Convert CSV file to XML

  - by Soeren

  I need to Convert a CSV into an XML document. The examples I have seen so far, all show how to do this with a fixed number of columns in the CSV. I have this so far, using LINQ: String[] File = File.ReadAllLines(@"C:\text.csv"); String xml = ""; XElement top = new XElement("TopElement", from items in File let fields = items.Split(';') select new XElement("Item", new XElement("Column1", fields[0]), new XElement("Column2", fields[1]), new XElement("Column3", fields[2]), new XElement("Column4", fields[3]), new XElement("Column5", fields[4]) ) ); File.WriteAllText(@"C:\xmlout.xml", xml + top.ToString()); This is for a fixed amount of columns, but my .CSV has a different number of columns on each line. How would you fit some sort of loop into this, depending on how many words (columns) there are in each line of the .CSV? Thnx

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• pyparsing ambiguity

  - by Claudiu

  I'm trying to parse some text using PyParser. The problem is that I have names that can contain white spaces. So my input might look like this: Joe Bob Jimmy Foo Joe decides to eat. Bob decides to not eat. Jimmy Foo decides to eat. How can I create a parser for the decides to eat line? If I create my name parser naively, meaning with alphabetic characters plus space characters, then it will match the entire line.

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• How do I Transpose with the 10,000 row limits of excel?

  - by ezlee69

  I am trying to Transpose all of column "B", but want to skip a line then grab the next 4 and paste them in the same column. How can I make this loop all of column "B" skipping every 5th line and change the range to the next open cell or "Range" automatically without manually typing each one individually? Range("B12:B16").Select Selection.Copy Sheets("Sheet2").Select Range("A2").Select Selection.PasteSpecial Paste:=xlPasteAll, Operation:=xlNone, SkipBlanks:= _ False, Transpose:=True Range("B18:B22").Select Selection.Copy Sheets("Sheet2").Select Range("A3").Select Selection.PasteSpecial Paste:=xlPasteAll, Operation:=xlNone, SkipBlanks:= _ False, Transpose:=True Range("B24:B28").Select Selection.Copy Sheets("Sheet2").Select Range("A4").Select Selection.PasteSpecial Paste:=xlPasteAll, Operation:=xlNone, SkipBlanks:= _ False, Transpose:=True

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