Search Results

Search found 12106 results on 485 pages for 'variable operators'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 127/485 | < Previous Page | 123 124 125 126 127 128 129 130 131 132 133 134  | Next Page >

  • Is it possible to have variable find conditions for both the key and value?

    - by DarrenD
    I'm trying to pass in both the field and the value in a find call: @employee = Employee.find(:all, :conditions => [ '? = ?', params[:key], params[:value].to_i) The output is SELECT * FROM `employees` WHERE ('is_manager' = 1) Which returns no results, however when I try this directly in mysqsl using the same call without the '' around is_manager, it works fine. How do I convert my params[:key] value to a symbol so that the resulting SQL call looks like: SELECT * FROM `employees` WHERE (is_manager = 1) Thanks, D

    Read the article

  • js code works for one variable(?), how to make it work for many?

    - by jerry87
    I have working code of js, it shows different div for selected option. <html> <head> <script src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript"> $(document).ready(function(){ $('#box1').hide(); $('#box2').hide(); $('#box3').hide(); $("#thechoices").change(function(){ $("#" + this.value).show().siblings().hide(); }); $("#thechoices").change(); }); </script> </head> <body> <select id="thechoices"> <option value="box1">Box 1</option> <option value="box2">Box 2</option> <option value="box3">Box 3</option> </select> <!-- the DIVs --> <div id="boxes"> <div id="box1"><p>Box 1 stuff...</p></div> <div id="box2"><p>Box 2 stuff...</p></div> <div id="box3"><p>Box 3 stuff...</p></div> </div> </body> </html> Please, I have no js experience, so I don't know how to make it work several times on one page for many "thechoices". Something like copy paste but more suitable than this: <script type="text/javascript"> $(document).ready(function(){ $('#box1').hide(); $('#box2').hide(); $('#box3').hide(); $('#box4').hide(); $('#box5').hide(); $('#box6').hide(); $("#thechoices").change(function(){ $("#" + this.value).show().siblings().hide(); }); $("#thechoices2").change(function(){ $("#" + this.value).show().siblings().hide(); }); $("#thechoices").change(); }); $("#thechoices2").change(); }); </script> </head> <body> <select id="thechoices"> <option value="box1">Box 1</option> <option value="box2">Box 2</option> <option value="box3">Box 3</option> </select> <!-- the DIVs --> <div id="boxes"> <div id="box1"><p>Box 1 stuff...</p></div> <div id="box2"><p>Box 2 stuff...</p></div> <div id="box3"><p>Box 3 stuff...</p></div> </div> <select id="thechoices2"> <option value="box4">1</option> <option value="box5">2</option> <option value="box6">3</option> </select> <!-- the DIVs --> <div id="boxes"> <div id="box4"><p>1 stuff...</p></div> <div id="box5"><p>2 stuff...</p></div> <div id="box6"><p>3 stuff...</p></div> </div> I know you can help me, it seems to be simple but I can't handle with this. How can I change my second code to work in the same way but not only for two selectors. I need it for many. Don't want to copy paste the same section like in my second code.

    Read the article

  • How to get line count from variable (from MYSQL query)?

    - by Mint
    My problematic code: testMYSQL=`mysql -u $mysqlUser -p$mysqlPass -h $mysqlHost --skip-column-names --batch -D $mysqlDB -e "SELECT $select FROM $mysqlTable WHERE nameTXT='test';"` $testMYSQL now contains: test test test Then I do: TEST=$(echo $testMYSQL | wc -l) echo "$TEST" I would of thought that would work, but it doesn't, it returns 1 But if I put this into $testMYSQL: "test\ntest\ntest" it will say 3… Whats going on here? does MYSQL not use new lines? PS, I know I can use a for loop to loop though the lines then count up the lines that way, but I was hoping for a simpler solution like wc

    Read the article

  • Variables Expired before Asp.net Membership provider automatically logout .

    - by Bendar
    I have a microsoft membership provider. in my application I'm using the variable which saving in cookie (tried session). The problem what I have: my variable expired before a authentication automatically logout. How can I set the time of membership provider automatic logout and expiring variable after 30 mins for example. Or how can I create a new server variable? Or maybe you suggest me better approach? Thank you

    Read the article

  • How do you keep the value of global variables (namely a struct variable) between postbacks?

    - by user3702304
    I'm new to this and have already searched for this with not much luck :( Lets say I have defined a struct array globally and filled the array with data on an Ajax ModalPopupExtender. I then have a ddl_SelectedIndexChanged event that does a postback and seems to recycle my array. Is there a way to fire the ddl_SelectedIndexChanged event to perform some code without doing a postback? Or is there an easy way to make the array of type struct retain it's values? (I am creating a website btw) Thanks in advance...

    Read the article

  • Performance of vector::size() : is it as fast as reading a variable?

    - by zoli2k
    I have do an extensive calculation on a big vector of integers. The vector size is not changed during the calculation. The size of the vector is frequently accessed by the code. What is faster in general: using the vector::size() function or using helper constant vectorSize storing the size of the vector? I know that compilers usually able to inline the size() function when setting the proper compiler flags, however, making a function inline is something that a compiler may do but can not be forced.

    Read the article

  • C++0x Smart Pointer Comparisons: Inconsistent, what's the rationale?

    - by GManNickG
    In C++0x (n3126), smart pointers can be compared, both relationally and for equality. However, the way this is done seems inconsistent to me. For example, shared_ptr defines operator< be equivalent to: template <typename T, typename U> bool operator<(const shared_ptr<T>& a, const shared_ptr<T>& b) { return std::less<void*>()(a.get(), b.get()); } Using std::less provides total ordering with respect to pointer values, unlike a vanilla relational pointer comparison, which is unspecified. However, unique_ptr defines the same operator as: template <typename T1, typename D1, typename T2, typename D2> bool operator<(const unique_ptr<T1, D1>& a, const unique_ptr<T2, D2>& b) { return a.get() < b.get(); } It also defined the other relational operators in similar fashion. Why the change in method and "completeness"? That is, why does shared_ptr use std::less while unique_ptr uses the built-in operator<? And why doesn't shared_ptr also provide the other relational operators, like unique_ptr? I can understand the rationale behind either choice: with respect to method: it represents a pointer so just use the built-in pointer operators, versus it needs to be usable within an associative container so provide total ordering (like a vanilla pointer would get with the default std::less predicate template argument) with respect to completeness: it represents a pointer so provide all the same comparisons as a pointer, versus it is a class type and only needs to be less-than comparable to be used in an associative container, so only provide that requirement But I don't see why the choice changes depending on the smart pointer type. What am I missing? Bonus/related: std::shared_ptr seems to have followed from boost::shared_ptr, and the latter omits the other relational operators "by design" (and so std::shared_ptr does too). Why is this?

    Read the article

  • how to get the content of iframe in a php variable? [closed]

    - by Sahil
    My code is somewhat like this: <?php if($_REQUEST['post']) { $title=$_REQUEST['title']; $body=$_REQUEST['body']; echo $title.$body; } ?> <script type="text/javascript" src="texteditor.js"> </script> <form action="" method="post"> Title: <input type="text" name="title"/><br> <a id="bold" class="font-bold"> B </a> <a id="italic" class="italic"> I </a> Post: <iframe id="textEditor" name="body"></iframe> <input type="submit" name="post" value="Post" /> </form> the texteditor.js file code is: $(document).ready(function(){ document.getElementById('textEditor').contentWindow.document.designMode="on"; document.getElementById('textEditor').contentWindow.document.close(); $("#bold").click(function(){ if($(this).hasClass("selected")) { $(this).removeClass("selected"); }else { $(this).addClass("selected"); } boldIt(); }); $("#italic").click(function(){ if($(this).hasClass("selected")) { $(this).removeClass("selected"); }else { $(this).addClass("selected"); } ItalicIt(); }); }); function boldIt(){ var edit = document.getElementById("textEditor").contentWindow; edit.focus(); edit.document.execCommand("bold", false, ""); edit.focus(); } function ItalicIt(){ var edit = document.getElementById("textEditor").contentWindow; edit.focus(); edit.document.execCommand("italic", false, ""); edit.focus(); } function post(){ var iframe = document.getElementById("body").contentWindow; } actualy i want to fetch data from this texteditor (which is created using iframe and javascript) and store it in some other place. i'm not able to fetch the content that is entered in the editor (i.e. iframe here). please help me out of this....

    Read the article

  • Checking for a session variable... returns (Object reference not set to an instance of an object.)

    - by Chocol8
    In the Session_Start i have Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs) Session("login") = False End Sub and in a custom .aspx page i included the following... Public ReadOnly Property GetLoginState() As Boolean Get If Current.Session("login") Is Nothing Then Current.Session("login") = False End If Return Current.Session("login") End Get End Property Why i am getting error the error Object reference not set to an instance of an object. at line If Current.Session("login") Is Nothing Then while checking for the login state as follows? If GetLogin = False Then 'Do something End if I mean i have already created the instance on the Session_Start... Haven't i? What am i doing wrong here?

    Read the article

  • How to check if a variable is an object?

    - by Patrick
    Is there any way to do the following at compile-time? int anInteger = 0; __if_object(anInteger) { // send object some messages } __if_primitive(anInteger) { // do something else } An dummy situation where this could be used is to define the __add_macro below. #define __add_macro(var, val) __something_goes_here__ int i = 1; MyInteger* num = [[MyNumber alloc] initWithValue:1] __add_macro(i, 4); __add_macro(num, 4); // both should now hold 5 Thanks

    Read the article

  • is it right way( safe) to assign post data value directly by name attibute value to a variable in

    - by I Like PHP
    i m working in PHP since one year, but now a days i got this way to assign post data value directly using name attribute . i m really curious to know the documentation about it.please refere me link regarding this . i explain by example here is my form <form method="post" action=""> <input type="text" name="userName" id="userName"> <input type="submit" name="doit" value="submit"> </form> to get the post data i always use $somevar=mysql_real_escape_string($_POST['userName']); but now i see another way $somevar= "userName"; i just want to know that is it safe n easy way??

    Read the article

  • environment variable .. why is that?

    - by dskim
    Plz understand my poor English :( I'm using visual studio 2010 and i want to coding with DLL files. so I adjusted the system environment Path . like C:~~ but execute file can't find DLL files.. so I moved Dll files to c:windows\system32 . then I can use it.. Why can't that find DLL files..? and I want to know how computer load DLL files by using system environment Path.. Thank you.. ps : path : %OPENCV_DIR%\bin; (absoultely there are DLL files in bin foler (OPENCV_DIR = C:\opencv\build\x86\vc10) and i'm testing Opencv

    Read the article

  • How to get the number of files in a folder as a variable?

    - by Jason
    Using bash, how can one get the number of files in a folder, excluding directories from a shell script without the interpreter complaining? With the help of a friend, I've tried $files=$(find ../ -maxdepth 1 -type f | sort -n) $num=$("ls -l" | "grep ^-" | "wc -l") which returns from the command line: ../1-prefix_blended_fused.jpg: No such file or directory ls -l : command not found grep ^-: command not found wc -l: command not found respectively. These commands work on the command line, but NOT with a bash script. Given a file filled with image files formatted like 1-pano.jpg, I want to grab all the images in the directory to get the largest numbered file to tack onto the next image being processed. Why the discrepancy?

    Read the article

  • How to calculate paypal fees, 2.9% +0.30 doesn't work for some cases variable FEEAMT in checkout met

    - by dev-cu
    Hello to everyone, thanks for reading this. I am implementing paypal checkout in my website it is working but i want to make a simple fees calculator for paypal in order to help the user, i went to paypal and they said their fees amount is 2.9% +0.30 fixed, but it is not working for some cases, for example: deposit $1.34 2.9 % = $0.04 rounded + $0.30 = $0.34, so i should get $1 credited but paypal send in its response in the field FEEAMT which indicate the "PayPal fee amount charged for the transaction" 0.35, what i am doing wrong? Thanks in advance.

    Read the article

  • Thread Synchronisation 101

    - by taspeotis
    Previously I've written some very simple multithreaded code, and I've always been aware that at any time there could be a context switch right in the middle of what I'm doing, so I've always guarded access the shared variables through a CCriticalSection class that enters the critical section on construction and leaves it on destruction. I know this is fairly aggressive and I enter and leave critical sections quite frequently and sometimes egregiously (e.g. at the start of a function when I could put the CCriticalSection inside a tighter code block) but my code doesn't crash and it runs fast enough. At work my multithreaded code needs to be a tighter, only locking/synchronising at the lowest level needed. At work I was trying to debug some multithreaded code, and I came across this: EnterCriticalSection(&m_Crit4); m_bSomeVariable = true; LeaveCriticalSection(&m_Crit4); Now, m_bSomeVariable is a Win32 BOOL (not volatile), which as far as I know is defined to be an int, and on x86 reading and writing these values is a single instruction, and since context switches occur on an instruction boundary then there's no need for synchronising this operation with a critical section. I did some more research online to see whether this operation did not need synchronisation, and I came up with two scenarios it did: The CPU implements out of order execution or the second thread is running on a different core and the updated value is not written into RAM for the other core to see; and The int is not 4-byte aligned. I believe number 1 can be solved using the "volatile" keyword. In VS2005 and later the C++ compiler surrounds access to this variable using memory barriers, ensuring that the variable is always completely written/read to the main system memory before using it. Number 2 I cannot verify, I don't know why the byte alignment would make a difference. I don't know the x86 instruction set, but does mov need to be given a 4-byte aligned address? If not do you need to use a combination of instructions? That would introduce the problem. So... QUESTION 1: Does using the "volatile" keyword (implicity using memory barriers and hinting to the compiler not to optimise this code) absolve a programmer from the need to synchronise a 4-byte/8-byte on x86/x64 variable between read/write operations? QUESTION 2: Is there the explicit requirement that the variable be 4-byte/8-byte aligned? I did some more digging into our code and the variables defined in the class: class CExample { private: CRITICAL_SECTION m_Crit1; // Protects variable a CRITICAL_SECTION m_Crit2; // Protects variable b CRITICAL_SECTION m_Crit3; // Protects variable c CRITICAL_SECTION m_Crit4; // Protects variable d // ... }; Now, to me this seems excessive. I thought critical sections synchronised threads between a process, so if you've got one you can enter it and no other thread in that process can execute. There is no need for a critical section for each variable you want to protect, if you're in a critical section then nothing else can interrupt you. I think the only thing that can change the variables from outside a critical section is if the process shares a memory page with another process (can you do that?) and the other process starts to change the values. Mutexes would also help here, named mutexes are shared across processes, or only processes of the same name? QUESTION 3: Is my analysis of critical sections correct, and should this code be rewritten to use mutexes? I have had a look at other synchronisation objects (semaphores and spinlocks), are they better suited here? QUESTION 4: Where are critical sections/mutexes/semaphores/spinlocks best suited? That is, which synchronisation problem should they be applied to. Is there a vast performance penalty for choosing one over the other? And while we're on it, I read that spinlocks should not be used in a single-core multithreaded environment, only a multi-core multithreaded environment. So, QUESTION 5: Is this wrong, or if not, why is it right? Thanks in advance for any responses :)

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 123 124 125 126 127 128 129 130 131 132 133 134  | Next Page >