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• How do I replace multiple newlines with a single one with Perl's Regular Expressions?

  - by Simon A. Eugster

  I've got a document containing empty lines (\n\n). They can be removed with sed: echo $'a\n\nb'|sed -e '/^$/d' But how do I do that with an ordinary regular expression in perl? Anything like the following just shows no result at all. echo $'a\n\nb'|perl -p -e 's/\n\n/\n/s'

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• Is external JavaScript source available to scripting context inside HTML page?

  - by John K

  When an external JavaScript file is referenced, <script type="text/javascript" src="js/jquery-1.4.4.min.js"></script> is the JavaScript source (lines of code before interpretation) available from the DOM or window context in the current HTML page? I mean by using only standard JavaScript without any installed components or tools. I know tools like Firebug trace into external source but it's installed on the platform and likely has special ability outside the context of the browser sandbox.

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• Why is there no circle or ellipse primitive in openGL?

  - by Ram Bhat

  Hey guys. Circles are one of the basics geometric entities. Yet there is no primitives defined in openGl for this like lines or polygons. Why so? Its a little annoying to include custom headers for this all the time! Any specific reason to omit it?

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• What is your most useful C/C++ snippet?

  - by maddizzyro

  Hello all, It seems that every project has an "util" module with various code snippets used throughout other files and which don't fit any particular pattern. I want to improve my "util" library, so please post here the most useful class / function / macro that you use in all your C/C++ projects. Please keep the entries small (under 100 lines) and give only one example per post. Thank you.

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• Using C# to read/write from excel spreadsheet.

  - by Aaron

  Hi there, I need to make a program that writes some data to an excel spreadsheet. Something basic along the lines of First name, last name, phone number, e-mail per row with each category in its own column. I don't even know where to start. If someone could tell me which assemblies to reference and maybe point me to a website or a book that covers writing/reading data from an excel spreadsheet via a c# program that would be great. Many thanks.

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• JavaScript Self Executing Functions - What's the Difference?

  - by modernzombie

  I am very familiar with self executing functions from working with jQuery. (function($) { /* do stuff */ })(jQuery); Today I was reading the backbone.js source and noticed that they do this: (function() { /* do stuff */ }).call(this); Is this achieving the same thing? Would the following 2 lines of code do the same thing? (function($) { /* do stuff */ })(jQuery); (function($) { /* do stuff */ }).call(jQuery);

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• Git: Ignoring certain commits when pushing

  - by int3

  I'd like to have some modifications that are private to my fork. How do I go about doing this? There's a question here about pushing a single commit, and the answer is to cherry-pick the commits you want to push from a private branch and put them on the main branch. However, I would like something more along the lines of ignoring a certain commit when pushing.

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• Tagging the differencies in both files

  - by Hakim

  I know that comparing 2 files is a typical problem and there are many discussions on this problem. but I have a rather different problem while working with text files: I have two text files which may differ in number of lines. now I want to compare two files and find the lines which differ. after that I want to tag all the differencies in both of files. for example here are the content of my files: File1.txt: This is the first line. This line is just appeared in File1.txt. you can see this line in both files. this line is also appeared in both files. this line and, this one are mereged in File2.txt. File2.txt: This is the first line. you can see this line in both files. this line is also appeared in both files. this line and, this one are mereged in File2.txt. After processing I want both files to be like this: File1.txt: This is the first line. <Diff>This line is just appeared in File1.txt.</Diff> you can see this line in both files. this line is also appeared in both files. <Diff>this line and,</Diff> <Diff>this one are merged in File2.txt.</Diff> File1.txt: This is the first line. <Diff></Diff> you can see this line in both files. this line is also appeared in both files. <Diff>this line and, this one are mereged in File2.txt.</Diff> <Diff></Diff> How can I do this? I know that some tools such as diff could help me, but how can I convert their results in this format? Thank you in advance.

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• how to send text to a process in a shell script?

  - by Martin

  So I have a Linux program that runs in a while(true) loop, which waits for user input, process it and print result to stdout. I want to write a shell script that open this program, feed it lines from a txt file, one line at a time and save the program output for each line to a file. So I want to know if there is any command for: - open a program - send text to a process - receive output from that program Many thanks.

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• How do I delete the first line in a file?

  - by Soop

  I can't search for a particular string, since they're all very similar, but I'd like something simple to chop out the first 4 lines in a file. They're all variable length too. I've had a a think about perl, and it all seems harder than I thought, but I'd like to do it in Perl, AWK or a shell command if possible. Does anybody have a simple way of doing this?

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• Draw line in Google Earth that takes account of the globe's curvature

  - by ptrn

  I want to draw some lines that would follow either the longitude or latitude, but it doesn't take the globe's curvature in account. How would I go about doing that? I'm using KML.

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• How to skip a statement in Eclipse during debugging

  - by frankfwl

  Is it possible to skip a statement in Eclipse while debugging? Suppose the process stopped at breakpoint and I want to skip the breakpoint line ( or maybe a few lines below), can I do it? On the debug tab, it only has "Step into", "Step over" and "Step return" buttons. I did google around but couldn't find anything, hopefully I can find an answer here.

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• Finding simultaneous events in a database between times

  - by Tots

  I have a database that stores phone call records. Each phone call record has a start time and an end time. I want to find out what is the maximum amount of phone calls that are simultaneously happening in order to know if we have exceed the amount of available phone lines in our phone bank. How could I go about solving this problem?

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• Testing of coding and naming conventions of C/C++ code

  - by shakov

  I'm looking for a script/tool that can be customized to check and enforce coding/naming conventions on a C/C++ code. It should check for example: Code lines are wrapped at some length. Private variables have prefix _ Code is indented properly. All functions are documented.

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• any faster alternative??

  - by kaushik

  have file data of format 3.343445 1 3.54564 1 4.345535 1 2.453454 1 and so on upto 1000 lines and i have number given such as a=2.44443 for the given file i need to find the row number of the numbers in file which is most close to the given number "a" how can i do this i am presently doing by loading whole file into list and comparing each element and finding the closest one any other better faster method?

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• What does this pointer-heavy C code do?

  - by justRadojko

  Could someone explain to me what should two following lines do: s.httpheaderline[s.httpheaderlineptr] = *(char *)uip_appdata; ++((char *)uip_appdata); This is taken from uIP code for microcontrollers. s - structure httpheaderline - http packet presented as a string httpheadrlineptr - integer value uip_appdata - received ethernet packet (string) If some more info is needed please let me know. BTW. Eclipse is reporting an error on the second line with message Invalid lvalue in increment so i'm trying to figure out how to solve this.

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• comment code in netbeans?

  - by ajsie

  a while ago i could comment any code in php with netbeans like this: /* * * */ I just typed /* ENTER and netbeans gave me that lines above. then when i typed @ it gave me a full list of all available tags (author, param and so on). i reinstalled my mac and since then it hasnt worked. someone knows why and how i can activate it? i installed the netbeans for php only.

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• C++ Arrays manipulations (python-like operations)

  - by Linai

  Hi Guys, I'm trying to figure out the best C++ library/package for array manipulations in a manner of python. Basically I need a simplicity like this: values = numpy.array(inp.data) idx1 = numpy.where(values > -2.14) idx2 = numpy.where(values < 2.0) res1 = (values[idx1] - diff1)/1000 res1 = (values[idx2] - diff2)*1000 In python it's just 5 lines, but the simplest way in C++ i can think of is quite a number of nested loops. Pls advise..

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• Need a better regex for group matching

  - by user350233

  Hi, Presently I'm using two regx: ABC.*1EFG ABC.*2HIJ to retrieve Line 1 and Line 2 from a text file. Is there a better single regex, so that both the lines(L1 and L2) from below can be matched. Line 1: ABCanystring1EFGanystring Line 2: ABCanystring2HIJanystring Line 3: ABCanystring2LMNanystring . . . Line n Thanks you in advance, Su

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• App Engine - Java AppStats - It shows all requests as cpu time of 0.

  - by Spines

  All lines in my AppStats look like this: real=19ms cpu=0ms api=0ms overhead=0ms, it has the correct real time, but the other values are always 0. Anyone have this problem before or know how to fix this?

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• Workflow for reading and writing files

  - by AIR_PhillipSenn

  In Workflow for reading and writing files the authors use these two lines of code: var file = air.File.documentsDirectory; file = file.resolvePath("AIR Test/testFile.txt"); But I think that it's using one variable for two different meanings, isn't it? Wouldn't it be better to write them as: var myDocumentsDirectory = air.File.documentsDirectory; var myTestFile = myDocumentsDirectory.resolvePath("AIR Test/testFile.txt");

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• heroku - how to see all the logs

  - by josh

  I have a small app on heroku. Whenever I want to see the logs I go to the command line and do heroku logs That only shows me about 100 lines. Is there not a way to see complete logs for our application on heroku?

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• I am in search of a programming language with the below characteristics: [closed]

  - by f f

  I am in search of a programming language with the below characteristics: it has existing, large and supportive/helpful community it has consice syntax it's fast it can create standalone apps with no dependencies, totally portable and compatible with windows I can easily set event listeners of almost anything I can easily do automatically every action possible has as extensive as possible ready-to-use commands list works easily with winxp, win com, firefox, etc api for example, I want to detect that I have clicked a specific button in a webpage in firefox or in a third-party app in windows: I want to do this easily, not with writing 100 lines of code

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• Java API Method Run Times

  - by Mike

  Is there a good resource to get run times for standard API functions? It's somewhat confusing when trying to optimize your program. I know Java isn't made to be particularly speedy but I can't seem to find much info on this at all. Example Problem: If I am looking for a certain token in a file is it faster to scan each line using string.contains(...) or to bring in say 100 or so lines putting them to a local string them performing contains on that chunk.

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• How do I combine two rows of same part, but add quantities?

  - by Tom

  I have table "PICKITEM" PARTID QTY A 1 A 3 B 11 C 8 D 5 D 3 I need a select statement that will return one line for like PARTIDs and add the qty field to together, yet also return the rest of the lines in the table as is PARTID QTY A 4 B 11 C 8 D 8 Probably a newb question, but I am new to SQL syntax and queries. Any help in getting me on the right path would be appreciated!

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