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Search found 150 results on 6 pages for 'deepak mittal'.

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• strange behaviour of grep in UNIX

  - by Happy Mittal

  When I type a command $ grep \\h junk then shell should interpret \\h as \h as two pairs of \ become \ each, and grep in turn, should interpret \h as \h as \ becomes \, so grep should search for a pattern \h in junk, which it is doing successfully. But it's not working for \\$. Please explain why ?

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• Increasing Screen Resolution to more than limit and scaling to origional

  - by Akshat Mittal

  I have a laptop, with Screen Resolution - 1366x768 (most common) - I want to increase it further to 1600x900 (or higher), in the same ratio. I want to scale the higher resolution on my current screen to fit it. I found xrandr with command xrandr --output LVDS1 --scale 1.4x1.4, this worked but again resulted to another problem, it does the scaling thing but the cursor is still blocked into the native screen resolution and I am not able to move it further, I found that the bug is already filed here. Also this command was only for Linux, I wanted to do this thing with both Linux and Windows (including Windows 8). I want a similar software that is bug free (at least not a major bug like this) and that supports Windows as well (or two separate software for Windows and Linux). Any help is appreciated and Thanks in advance.

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• Unable to Connect to just Google Servers

  - by Akshat Mittal

  I am in an extremely strange problem. I am unable to connect to just Google Servers. I am not able to access any site related to Google, Google.com | YouTube | Google+ | Webmaster Tools | jQuery CDN, nothing is working. I am able to open any other website (as I am posting this question on SuperUser), even the Google DNS (8.8.8.8 and 8.8.4.4) are offline. Please Help!! Update 1: Google DNS are back online, YouTube is back online. But website on domain google.com is not working (ex: play.google.com, maps.google.com, google.com/search, etc). Update 2: I am able to access Google.com (only) with (one of) its IP addresss(s) listed below: 74.125.227.41 74.125.227.46 74.125.227.32 74.125.227.33 74.125.227.34 74.125.227.35 74.125.227.36 74.125.227.37 74.125.227.38 74.125.227.39 74.125.227.40 Update 3: I consulted my friends nearby and they said that they are also experiencing the same problem. Seams like this is a major problem in this area (or India !!) The Problem is Now Solved!! I am able to open Google.com

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• Emulating touch screen on Windows 8 with a Touch-Pad

  - by Akshat Mittal

  I am currently running Windows 8 Pro RTM (MSDN) and wonder if there is any way to use the touch-pad as some kind of touchscreen for it or maybe just gestures. I have a Synaptics Touch-pad, searching the internet I found some articles saying about some kind of relation between Synaptics Touch-pad and Windows 8, but I was not able to get info about how to use the gestures or something similar. Simply the question is, How can I enable Synaptics Gestures for Windows 8 or use the touch-pad as touch-screen (I know it would be a really tiny touchscreen, but I want to try) with third-party Tools or hacks?

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• prolog program to find equality of two lists in any order

  - by Happy Mittal

  I wanted to write a prolog program to find equality of two lists, the order of elements doesn't matter. So I wrote following: del( _ , [ ] , [ ] ) . del( X , [ X|T ] , T ). del( X , [ H|T ] , [ H|T1 ] ) :- X \= H , del( X , T , T1 ). member( X, [ X | _ ] ) . member( X, [ _ | T ] ) :- member( X, T ). equal( [ ], [ ] ). equal( [X], [X] ). equal( [H1|T], L2 ) :- member( H1, L2 ), del( H1, L2, L3), equal(T , L3 ). But when I give input like equal([1,2,3],X)., it doesn't show all possible values of X. instead the program hangs in the middle. What could be the reason?

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• Extracting URIs from RDF web page in Java using Jena Library

  - by Prannoy Mittal

  I have written following code for extratcting URIs from a web page with content type application/rdf-xml for Linked Data application. public static void test(String url) { try { Model read = ModelFactory.createDefaultModel().read(url); System.out.println("to go"); StmtIterator si; si = read.listStatements(); System.out.println("to go"); while(si.hasNext()) { Statement s=si.nextStatement(); Resource r=s.getSubject(); Property p=s.getPredicate(); RDFNode o=s.getObject(); System.out.println(r.getURI()); System.out.println(p.getURI()); System.out.println(o.asResource().getURI()); } } catch(JenaException | NoSuchElementException c) { } } But above code is not extracting all URIs. It provides only few of the URIs. Please guide me where i Went wrong?? hey Rafeel For Eq: for XML File : <?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ex="http://example.org/stuff/1.0/"> <rdf:Description rdf:about="http://www.w3.org/TR/rdf-syntax-grammar" dc:title="RDF/XML Syntax Specification (Revised)"> <ex:editor> <rdf:Description ex:fullName="Dave Beckett"> <ex:homePage rdf:resource="http://purl.org/net/dajobe/" /> </rdf:Description> </ex:editor> </rdf:Description> </rdf:RDF> The output is : Subject URI is http://www.w3.org/TR/rdf-syntax-grammar Predicate URI is http://example.org/stuff/1.0/editor Object URI is null Subject URI is http://www.w3.org/TR/rdf-syntax-grammar Predicate URI is http://purl.org/dc/elements/1.1/title Website is read

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• echo newline suppression

  - by Happy Mittal

  Why $echo '-n' doesn't write -n on terminal although -n is written within quotes ?

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• grep doubt in UNIX

  - by Happy Mittal

  When I write $ grep \$ then whatever I type on terminal, is matched and printed on terminal. How is \$ being interpreted?

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• special character in UNIX

  - by Happy Mittal

  I want to add backspace character literally in my file named junk. So I did following $ ed a my name is happy\b (here b means I typed backspace so \ gets disapperaed and cursor sits sfter y) . w junk q But when I do $ od -cb junk it doesn't show backspace.

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• piping in UNIX doubt

  - by Happy Mittal

  In The Unix Programming Environment by K & P, it is written that " The programs in a pipeline actually run at the same time, not one after another. This means that programs in a pipeline can be interactive;" How can programs run at same time? For ex: $ who | grep mary | wc -l How grep mary will be executed until who is run or how wc -l will be executed until it knows results of previous programs?

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• strange behaviour of grep in UNIX

  - by Happy Mittal

  When I type a command $ grep \\h junk then shell should interpret \\h as \h as two pairs of \ become \ each, and grep in turn, should interpret \h as \h as \ becomes \, so grep should search for a pattern \h in junk, which it is doing successfully. But it's not working for \\$. Please explain why ?

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• Pass temporary object to function that takes pointer

  - by Happy Mittal

  I tried following code : #include<iostream> #include<string> using namespace std; string f1(string s) { return s="f1 called"; } void f2(string *s) { cout<<*s<<endl; } int main() { string str; f2(&f1(str)); } But this code doesn't compile. What I think is : f1 returns by value so it creates temporary, of which I am taking address and passing to f2. Now Please explain me where I am thinking wrong?

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• How do I prevent capistrano from overwriting files uploaded by users in their own folders?

  - by Hrishi Mittal

  I'm using Capistrano and git to deploy a RoR app. I have a folder under which each user has their own folder. When a user uploads or saves a file, it is saved in their own folder. When I deploy new versions of the code to the server, the user files and folders are overwritten with what's on my dev machine. Is there a way to ignore some folders in capistrano, like we do in git? This post - http://www.ruby-forum.com/topic/97539 - suggests using symlinks and storing the user files in a shared folder. But it's an old post, so I'm wondering if there is a better way to do it now. Also, does anyone know of any good screencasts/tutorials to recommend for using RoR+git+capistrano? Thanks.

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• friend declaration in C++

  - by Happy Mittal

  In Thinking in C++ by Bruce eckel, there is an example given regarding friend functions as // Declaration (incomplete type specification): struct X; struct Y { void f(X*); }; struct X { // Definition private: int i; public: friend void Y::f(X*); // Struct member friend }; void Y::f(X* x) { x->i = 47; } Now he explained this: Notice that Y::f(X*) takes the address of an X object. This is critical because the compiler always knows how to pass an address, which is of a fixed size regardless of the object being passed, even if it doesn’t have full information about the size of the type. If you try to pass the whole object, however, the compiler must see the entire structure definition of X, to know the size and how to pass it, before it allows you to declare a function such as Y::g(X). But when I tried void f(X); as declaration in struct Y, it shows no error. Please explain why?

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• printing double in binary

  - by Happy Mittal

  In Thinking in C++ by Bruce eckel, there is a program given to print a double value in binary.(Chapter 3, page no. 189) int main(int argc, char* argv[]) { if(argc != 2) { cout << "Must provide a number" << endl; exit(1); } double d = atof(argv[1]); unsigned char* cp = reinterpret_cast<unsigned char*>(&d); for(int i = sizeof(double); i > 0 ; i -= 2) { printBinary(cp[i-1]); printBinary(cp[i]); } } Here while printing cp[i] when i=8(assuming double is of 8 bytes), wouldn't it be undefined behaviour? I mean this code doesn't work as it doesn't print cp[0].

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• Function declaration in C and C++

  - by Happy Mittal

  I have two C++ files, say file1.cpp and file2.cpp as //file1.cpp #include<cstdio> void fun(int i) { printf("%d\n",i); } //file2.cpp void fun(double); int main() { fun(5); } When I compile them and link them as c++ files, I get an error "undefined reference to fun(double)". But when I do this as C files, I don't get error and 0 is printed instead of 5. Please explain the reason. Moreover I want to ask whether we need to declare a function before defining it because I haven't declared it in file1.cpp but no error comes in compilation.

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• string substitution regular expression not working in tcl

  - by Puneet Mittal

  i am trying to replace all the special characters including white space, hyphen, etc, to underscore, from a string variable in tcl. I wrote the code below but it doesn't seem to be working. set varname $origVar puts "Variable Name :>> $varname" if {$varname != ""} { regsub -all {[\s-\]\[$^?+*()|\\%&#]} $varname "_" $newVar } puts "New Variable :>> $newVar" one issue is that, instead of replacing the string in $varname, it is replacing the data inside $origVar. No idea why, and also i read the example code (for proper syntax) in my tcl book and according to that it should be something like this regsub -all {[\s-][$^?+*()|\\%&#]} $varname "_" newVar so i used the same syntax but it didn't work and gave the same result as modifying the $origVar instead of required $varname value.

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• initialization of objects in c++

  - by Happy Mittal

  I want to know, in c++, when does the initialization of objects take place? Is it at the compile time or link time? For ex: //file1.cpp extern int i; int j=5; //file2.cpp ( link with file1.cpp) extern j; int i=10; Now, what does compiler do : according to me, it allocates storage for variables. Now I want to know : does it also put initialization value in that storage or is it done at link time?

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• makefile extension

  - by Happy Mittal

  I wanted to create a makefile. So I wrote instructions in a notepad file. But what extension should I give while saving this file?

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• static initialization confusion

  - by Happy Mittal

  I am getting very confused in some concepts in c++. For ex: I have following two files //file1.cpp class test { static int s; public: test(){s++;} }; static test t; int test::s=5; //file2.cpp #include<iostream> using namespace std; class test { static int s; public: test(){s++;} static int get() { return s; } }; static test t; int main() { cout<<test::get()<<endl; } Now My question is : 1. How two files link successfully even if they have different class definitions? 2. Are the static member s of two classes related because I get output as 7. Please explain this concept of statics.

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• commands executing in piping in UNIX

  - by Happy Mittal

  when I write a command $ echo date then it prints "date" as it is i.e it doesn't run date program. But when I write $ echo date | wc then correct answer is produced as if date was run. How piping is making difference here ? Please explain.

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• static initialization order fiasco

  - by Happy Mittal

  I was reading about SIOF from a book and it gave an example : //file1.cpp extern int y; int x=y+1; //file2.cpp extern int x; y=x+1; Now My question is : In above code..will following things happen ? 1. while compiling file1.cpp, compiler leaves y as it is i.e doesn't allocate storage for it. 2. compiler allocates storage for x, but doesn't initialize it. 3. While compiling file2.cpp, compiler leaves x as it is i.e doesn't allocate storage for it. 4. compiler allocates storage for y, but doesn't initialize it. 5. While linking file1.o and file2.o, now let file2.o is initialized first, so now: Does x gets initial value of 0? or doesn't get initialized?

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• output redirection in UNIX

  - by Happy Mittal

  I am a beginner in UNIX. I am finding some difficulty in input/output redirection. ls -l temp cat temp Here why temp file is shown in the list and moreover, it is showing 0 characters. wc temp temp cat temp here output is 0 0 0 temp. Why lines, words, characters are 0. Please help me to undestand this concept.

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• Forward Shibboleth Environment Variables to Tomcat via Apache

  - by Deepak Singh Rawat

  I am using Shibbolethv2.3 with Apache web server and Tomcat application server. I am using Apache as a reverse proxy using mod_proxy.so. I am not able to forward the Shibboleth environment variables from Apache to Tomcat. I am able to forward the attributes in the headers but as already mentioned in the wiki this approach is not safe. I have tried forwarding the environment variables by the following directive : SetEnv AJP_username ${username} then at the Java side I can access the attribute by : request.getAttribute("username"); The strange thing here is that, I get a different value instead of the one set by Shibboleth. I get the Windows account name as a result. If I use any other attribute name, I get a null value. I have searched a lot and have run out of options. Please guide me towards the right solution. My setup details : Shibboleth version : 2.3 OS : Windows XP SP3 Webserver : Apache 2.2 Application Server : Tomcat 6 Proxy module : mod_proxy.so

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• RTL8168B/8111B Lan card is not detected in Redhat..Error is make ***/lib/modules/2.6.18-53.e15/build

  - by Deepak Narwal

  0 Hello friends... In My computer Lan card model is Realtek RTL8168B/8111B PCI-E GIGABIT ETHERNET NIC (NDIS 6.20) My system is dual boot windows 7 and redhat 5.1.Redhat is not picking up this model of Lan card automaticlly. I tried it by downloading from realtak site for this particular model and find some .tar packages for my kernal and when i tried to install them ... check old drivers & unload it build the module and install make */lib/modules/2.6.18-53.e15/build: no such file or directory stop make[1]: *[modules] error 2 make : [modules] error 2 i downloaded tar files from sites and unpack according to their instrution i tried to run autorun.sh script as mentioned in readme file but after doing this it is showing above error... Now what to do i am not getting

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