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  • Checking for an "end of line" in a C-string

    - by Numerator
    I would really love your help with the following problem: I want to get as an input from the user a maximum length of 30 chars string and check whether it contains an end of line. This is what I tried to write so far: int main(void) { int i; char* command = (char*)calloc(31, sizeof(char)); while (0 < 1) { scanf("%s", command); for (i = 0; i <= strlen(command); ++i) { if (command[i] == '\n') printf("here"); } if (strcmp(command, "quit") == 0) break; } The idea is to check whether the command given by the user as input is "legal" - that is of length < 31. when i run this code, it never prints "here" regardless of the length of input.

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  • php exec and shell_exec not working

    - by chris
    I want to run an exe file on my server and return the output to the browser screen. The exe file takes a input file and then returns data on the screen. Why is this code not working? $output = shell_exec('myprogram < INP.DAT'); echo "<pre>" . var_export($output, TRUE) ."</pre>\\n"; It displays "NULL" on the browser screen. I have also tried exec(). There it returns "Array()".

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  • Is there a method I can override on a JavaScript object to control what is displayed by console.log?

    - by agnoster
    I'm thinking in particular of Chrome, though Firebug would be interesting to. I've tried toString() and valueOf(), but neither of those seem to be used. Interestingly, if I take a function it'll display the function definition - but then if I add a toString() method it will show null! var a = function(){}; console.log(a); // output: function (){} a.toString = function(){ return 'a'; }; console.log(a); // output: null a.valueOf = function(){ return 'v'; }; console.log(a); // output: null Any ideas?

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  • How to keep the first result of a function from Prolog?

    - by zuhakasa
    I need to write a customized function that will be called many times by other fixed functions. In this function, at the first called time, it will return the total number of lines of a file. The second called time of this function, forward, will return the number of lines in small sections of this file. My question is how I keep the first returned result(total number of lines of a file) and use it for the next called times of my function. I need to write or declare any thing only in this function(not in the caller). Something like this: myFunction(Input, MyResult, FirstResult) :- calculateInputFunction(Input, Result), !, MyResult is Result, ... . The problem is, every time myFunction is called, it receives different Input and returns different MyResult. But I would like to keep the first MyResult to use for next called times of myFunction. How can I do that? Thanks very much for your answer in advance.

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  • Makefile won't copy .o to obj/ and target to bin/ folders

    - by about blank
    I'm trying to write a Makefile which will copy its target and objects to bin/ and obj/ directories, respectively. Yet, when I try to run it I get the following error: nasm -f elf64 -g -F stabs main.asm -l spacelander.lst ld -o spacelander obj/main.o ld: cannot find obj/main.o: No such file or directory make: *** [spacelander] Error 1 Why is this happening? Update I noticed when I posted the error that it was due to white spacing errors. After taking care of those, I still get the new error I replaced with the old one I mentioned prior. What is this?? Update 2 Posted -d flag output below Makefile source. Source ASM := nasm ARGS := -f FMT := elf64 OPT := -g -F stabs SRC := main.asm OBJDIR := obj TARGETDIR := bin OBJ := $(addprefix $(OBJDIR)/,$(patsubst %.asm, %.o, $(wildcard *.asm))) TARGET := spacelander .PHONY: all clean all: $(OBJDIR) $(TARGET) $(OBJDIR): mkdir $(OBJDIR) $(OBJDIR)/%.o: $(SRC) $(ASM) $(ARGS) $(FMT) $(OPT) $(SRC) -l $(TARGET).lst $(TARGET): $(OBJ) ld -o $(TARGET) $(OBJ) clean: @rm -f $(TARGET) $(wildcard *.o) @rm -rf $(OBJDIR) make -d Output - NOTE: output is too many characters for body, thus is pastebinned http://pastebin.com/3bctGJxs

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  • C Different answers for a variable when running 'Debug' and 'Start without debug'

    - by Craz
    I keep getting this weird output from my code everytime I use the 'start without degugging' (ctrl-F5) as opposed to normal 'debug' (F5). When I try to find the following value of norm_differnece in debug (pressing F5) mode, it gives me the correct answer for norm_difference normdifference = 1.000000 but in 'start without debugging' (pressing ctrl-f5) the wrong output normdifference = 1456816083547664100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000 The following is a segment of code which is gives the output Note: X[] = is a array of stored DOUBLE values for(i=0;i<n;i++){ sum_difference += (pow((X[i*n]-X[i]),2)); } norm_difference = sqrt(norm_difference); for(i=0;i<n;i++){ sum_norm_1 += pow(X[i],2); } norm_1 = sqrt(norm_1); //Take square root of the sum of squares for the row printf("normdifference = %f \n norm_1 = %f \n",norm_difference,norm_1);

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  • simple question: Difficulty in declaring and using variable

    - by user281180
    What is wrong with the following code: I`m having the error message Error 1 ; expected <%if (Model.ReferenceFields != null) {%> <%int count = 1; %> <%foreach (var referenceName in Model.ReferenceFields) {%> <%var value = "value"; %> <%count++; %> <%value = value + count.ToString(); %> <tr> <td><input type="hidden" name="Tests.Index" value='<%value%>' /></td> <td><input type="text" name="Tests['<%value%>'].Value"/></td> <td><input type="button" value= "Add" /></td></tr> <%} %> <%} %>

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  • Submit form without page reloading

    - by Camran
    I have a classifieds website, and on the page where ads are showed, I am creating a "Send a tip to a friend" form... So anybody who wants can send a tip of the ad to some friends email-adress. I am guessing the form must be submitted to a php page right? <form name='tip' method='post' action='tip.php'> Tip somebody: <input name="tip_email" type="text" size="30" onfocus="tip_div(1);" onblur="tip_div(2);"/> <input type="submit" value="Skicka Tips"/> <input type="hidden" name="ad_id" /> </form> When submitting the form, the page gets reloaded... I don't want that... Is there any way to make it not reload and still send the mail? Preferrably without ajax or jquery... Thanks

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  • Parent element selection problem?

    - by Starx
    My HTML is something like this <div id="mydiv" class="common"> <input type="text" id="text1" value="" /> <input type="text" id="text2" value="" /> </div> I am assigning a function on the onclick event of the textbox like this $(document).ready(function() { $(".common input").click(function() { //////// What I am trying to do is access the id of its parent // in this case it is "mydiv" alert($(this:parent).attr('id')); }); But it is not working

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  • Understanding behaviour of read() and write()

    - by neo730
    hi i am a student and just start learning low level c programming.i tried to understand read() and write() methods with this program. #include <unistd.h> #include <stdlib.h> main() { char *st; st=calloc(sizeof(char),2);//allocate memory for 2 char read(0,st,2); write(1,st,2); } i was expecting that it would give segmentation fault when i would try to input more than 2 input characters.but when i execute program and enter " asdf " after giving " as " as output it executes "df" command. i want to know why it doesn't give segmentation fault when we assign more than 2 char to a string of size 2.and why is it executing rest(after 2 char)of input as command instead of giving it as output only? also reading man page of read() i found read() should give EFAULT error,but it doesn't. I am using linux.

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  • Selecting radiobuttons populated within asp.net RadioButtonList with jQuery

    - by user194881
    Hello and thanks in advance for the communal help I always find here. I have been tinkering around with what should seem a pretty straight forward task even for a jQuery newb as myself. I have a radiobuttonlist control bound to a collection: <asp:RadioButtonList ID="radBtnLstPackageSelector" runat="server" CssClass="PackageS"> </asp:RadioButtonList> My form does have several other controls of the same type; Now, the challenge is to select and wire up a on Click event for every radiobutton from the radBtnLstPackageSelector. I have tried several approaches such as: var results1 = $(".PackageS").children("input"); var results1 = $(".PackageS").children("input[type=radiobutton"); var results1 = $("table.PackageS > input[type=radiobutton"); with no luck... Your help would be great right now! ~m

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  • Access dynamically generated control from code behind

    - by user648922
    I load a piece of html which contains something like: <em> < input type="text" value="Untitled" name="ViewTitle" id="ViewTitle" runat="server"> </em> into my control. The html is user defined, do please do not ask me to add them statically on the aspx page. On my page, I have a placeholder and I can use LiteralControl target = new LiteralControl (); // html string contains user-defined controls target.text = htmlstring to render it property. My problem is, since its a html piece, even if i know the input box's id, i cannot access it using FindControl("ViewTitle") (it will just return null) because its rendered as a text into a Literal control and all the input controls were not added to the container's control collections. I definitely can use Request.Form["ViewTitle"] to access its value, but how can I set its value?

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  • Simple bind not working in IE for Radiobutton in jQuery

    - by Jonathan
    Hi this works fine in Firefox, but not IE. What am I doing wrong? Thanks for the help in advance! $(document).ready(function(){ $("#radiodiv").buttonset(); $('#radio1').bind("click", function() { alert('Hello'); }); } <form> <div id="radiodiv"> <input type="radio" id="radio1" name="radio" checked="checked" /><label for="radio1">WaveHeight</label> <input type="radio" id="radio2" name="radio" /><label for="radio2">Current</label> <input type="radio" id="radio3" name="radio" /><label for="radio3">WaveHeightDir</label> </div> </form>

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  • [cli/linux] get plain text from raw emails (not attachments extraction)

    - by etuardu
    Hi, having a raw email as input (i.e. the text between "DATA" and "." sent by a smtp client) I need to extract the mail content (which I know is always text only) as plain text. This means decoding transfer encoding (if any: could be base64 or quoted-printable), merging mutiparts (if any), and stripping headers. I tried various tools that would do that: mewdecode, uudecode, uudeview... I only managed to get this last one to work, but it won't output anything if the mail is not MIME encoded and it stores its output in an unpredictable (nor forceable) filename, so it's hard to use it in a not-interactive shell script. Since this is a pretty common job (every mail client have to do that), it's weird it's so complicated. Do you have some hints? (Actually, forcing uudeview to output in a certain file would be good enough). Thank you!

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  • use printf("text %d", number) type format to assign value to variable

    - by rksprst
    I would like to use the syntax that printf uses, using the %d, %s and adding values after to assign a value to a char[]. Is this possible? e.g. Given an output of: printf("now: %d-%d-%d %d:%d:%d\n", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); I'd like to assign that to char[] output; How can this be done? I tried: sprintf(output, "now: %d-%d-%d %d:%d:%d\n", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); but that didn't seem to work. Is sprintf used differently... or is that not what I should be using? Thanks!

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  • How to tell MATLAB to open and save specific files in the same directory

    - by its-me
    I have to run an image processing algorithm on numerous images in a directory. An image is saved as name_typeX.tif, so there are X different type of images for a given name. The image processing algorithm takes an input image and outputs an image result. I need to save this result as name_typeX_number.tif, where 'number' is also an output from the algorithm for a given image. Now.. How do I tell MATLAB to open a specific 'typeX' file? Also note that there are other non-tif files in the same directory. How to save the result as name_typeX_number.tif? The results have to be saved in the same directory where the input images are present. How do I tell MATLAB NOT to treat the results that have been saved as an input images? I have to run this as background code on a server... so no user inputs allowed Thanks

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  • Use of 'standalone parentheses'

    - by zaf
    I just answered a question where I advised removing parentheses around a statement and was asked why, to which I had no answer when I realised that it caused no errors/warnings. I could only cite bad practice. But maybe I'm the one missing something... I did my own tests: (print('!')); // Outputs '!' ((print('!!'))); // Outputs '!!' (1); // No output (qwerty); // No output (1==2); // No output (1=2); // Syntax error // etc... Can someone shed some light on whats going on and of what use are 'standalone parentheses'?

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  • What does the R function `poly` really do?

    - by merlin2011
    I have read through the manual page ?poly (which I admit I did not completely comphrehend) and also read the description of the function in book Introduction to Statistical Learning. My current understanding is that a call to poly(horsepower, 2) should be equivalent to writing horsepower + I(horsepower^2). However, this seems to be contradicted by the output of the following code. library(ISLR) summary(lm(mpg~poly(horsepower,2), data=Auto))$coef summary(lm(mpg~horsepower+I(horsepower^2), data=Auto))$coef Output: Estimate Std. Error t value Pr(>|t|) (Intercept) 23.44592 0.2209163 106.13030 2.752212e-289 poly(horsepower, 2)1 -120.13774 4.3739206 -27.46683 4.169400e-93 poly(horsepower, 2)2 44.08953 4.3739206 10.08009 2.196340e-21 Estimate Std. Error t value Pr(>|t|) (Intercept) 56.900099702 1.8004268063 31.60367 1.740911e-109 horsepower -0.466189630 0.0311246171 -14.97816 2.289429e-40 I(horsepower^2) 0.001230536 0.0001220759 10.08009 2.196340e-21 My question is, why does the output not match, and what is poly really doing?

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  • Changing class of h2 inside specific div

    - by user1985060
    I want to make it so that everytime you click on an 'h2' tag, the 'input' inside gets selected and the 'h2' tag changes background, but if another 'h2' tag is clicked, the current highlight and 'input' selection changes accordingly. problem is that I have 3 different that do the same and with my code all the 3 forms are affected rather one. How do i limit my changes to only be contained to that form. Here is some code for clarification ' <form> ... <h2 onclick="document.getElementById(1001).checked='True' $('h2').removeClass('selected'); $(this).addClass('selected'); "> CONTENT <input type="radio" name="radio" id="1001" value="1001" /> </h2> ... </form>

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  • Is there a way to redirect ONLY stderr to stdout (not combine the two) so it can be piped to other programs

    - by James K
    I'm working in a Windows CMD.EXE environment and would like to change the output of stdout to match that of stderr so that I can pipe error messages to other programs without the intermediary of a file. I'm aware of the 2>&1 notation, but that combines stdout and stderr into a single stream. What I'm thinking of would be something like this: program.exe 2>&1 | find " " But that combines stdout and stderr just like: program.exe | find " " 2>&1 I realize that I could do... program 2>file type file | find " " del file But this does not have the flexibility and power of a program | find " " sort of notation. Doing this requires that program has finished with it's output before that output can be processed.

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  • jquery problem where the returned data from an XML file seems inaccessible

    - by squeaker
    Hi all, I'm using an xml file to generate some links which i would like to then be able to click on to populate an input box: $(xmlResponse).find('types').each(function(){ var id = $(this).attr('id'); var type = $(this).find('type').text(); $('<span title=\"'+type+'\" class=\"type\">'+type+'</span>').appendTo('#types'); }); $('span.type').click(function() { var title = $(this).attr('title'); $("input[name='type']").val(title); }); But for some reason clicking on the liks does not populate the input box. It does work if the span is hard coded into the page for example: <span title="text to populate" class="type">test</span> I'm guessing that the XML is not getting loaded into the DOM in the right way (or something like that) Any Ideas?

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  • What is the difference between "render a view" and send the response using the Response's method "sendResponse()"?

    - by Green
    I've asked a question about what is "rendering a view". Got some answers: Rendering a view means showing up a View eg html part to user or browser. and So by rendering a view, the MVC framework has handled the data in the controller and done the backend work in the model, and then sends that data to the View to be output to the user. and render just means to emit. To print. To echo. To write to some source (probably stdout). but don't understand then the difference between rendering a view and using the Response class to send the output to the user using its sendResponse() method. If render a view means to echo the output to the user then why sendResponse() exists and vise versa? sendResponse() exactly sends headers and after headers outputs the body. They solve the same tasks but differently? What is the difference?

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  • Adding form inputs in javascript (jquery)

    - by matthewsteiner
    I understand that you do something like: $('form').append('<input type="text" name="color-1" value="Hello" />'); But I have two questions about it. First off, I don't want it added to the end of the form, but after the last input in the "color" section. Secondly, where "name=color-1", I need the one to increment if they want to add more than one input, you know? So that I can process it on the server. Any ideas?

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  • [ruby] How to convert STDIN contents to an array?

    - by miketaylr
    I've got a file INPUT that has the following contents: 123\n 456\n 789 I want to run my script like so: script.rb < INPUT and have it convert the contents of the INPUT file to an array, splitting on the new line character. So, I'd having something like myArray = [123,456,789]. Here's what I've tried to do and am not having much luck: myArray = STDIN.to_s myArray.split(/\n/) puts field.size I'm expecting this to print 3, but I'm getting 15. I'm really confused here. Any pointers?

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  • Why this script is not validating the form

    - by danishjan
    This is registration form code. i wrote script in one i have accessed every element by Id and in One by name but both donot validation it. <div id="form"> <form action="" method="get" id="formdata" > <p> <label for="firstName" class="labels">&nbsp; &nbsp;First Name </label> <input type="text" name="firstName" id="firstName" placeholder="First Name" /> <label for="firstName" id="errorfirstName" style="color:red; font- size:14px; visibility:hidden;"> Please Enter First Name </label> </p> <p> <label for="lastName" class="labels">&nbsp; &nbsp;Last Name </label> <input type="text" name="lastName" id="lastName" placeholder="Last Name" /> <label for="lastName" id="errorlastName" style="color:red; font-size:14px; visibility:hidden;"> Please Enter Last Name</label> </p> <p> <label for="fatherName" class="labels">Father Name</label> <input type="text" name="fatherName" id="fatherName" placeholder="Father Name" /> <label for="fatherName" id="errorfatherName" style="color:red; font- size:14px; visibility:hidden;"> Please Enter Father Name </label> </p> <p> <label for="classNo" class="labels">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Class </label> <input type="text" name="classNo" id="classNo" placeholder="Class" /> <label for="classNo" id="errorclassNo" style="color:red; font-size:14px; visibility:hidden;"> Please Enter Class </label> </p> <p> <label for="address" class="labels">&nbsp; &nbsp; &nbsp; &nbsp;Address </label> <input type="text" name="address" id="address" placeholder="Address" /> <label for="address" id="erroraddress" style="color:red; font-size:14px; visibility:hidden;"> Please Enter Address </label> </p> <p> <input type="submit" value="Submit" onSubmit="return validate()" /> </p> </form> And the JavaScript Code is here. What is wrong with this code. This code is through accessing by Element Id. <script type="text\javascript"> function validate(){ var valid=true; var fname=document.getElementById("firstName"); var lname=document.getElementById("lastName"); var fathname=document.getElementById("fatherName"); var classno=document.getElementById("classNo"); var address=document.getElementById("address"); var errfname=document.getElementById("errorfirstName"); var errlname=document.getElementById("errorlastName"); var errfathname=document.getElementById("errorfatherName"); var errclass=document.getElementById("errorclass"); var erraddress=document.getElementById("erroraddress"); if(fname.value == ""){ errfname.style.visibility="visible"; valid=false; } if(lname.value == ""){ errlname.style.visibility="visible"; valid=false; } if(fathname.value == ""){ errfathname.style.visibility="visible"; valid=false; } if(classno.value == ""){ errclass.style.visibility="visible"; valid=false; } if(address.value == ""){ erraddress.style.visibility="visible"; valid=false; } return valid; } </script>

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