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  • Does the compiler optimize the function parameters passed by value?

    - by Naveen
    Lets say I have a function where the parameter is passed by value instead of const-reference. Further, lets assume that only the value is used inside the function i.e. the function doesn't try to modify it. In that case will the compiler will be able to figure out that it can pass the value by const-reference (for performance reasons) and generate the code accordingly? Is there any compiler which does that?

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  • How to implement a login page in a GWT app?

    - by Gatis
    My WebApp needs to authenticate user before allowing any sort of access. The scenario I'm trying to implement is a login page with username and password fields. Once user hits "send" button, a sign like "Verifing..." should be shown up while an RPC call verifies credentials. In case of success, load the main app screen. What is the best way to implement that?

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  • more button in calendar

    - by yogsma
    Does anyone know jquery plugin for more button in month view of a calendar which shows all events of a particular date in case those events are not getting accommodated in that date. edit++ I want a jquery plugin for table row resizing. Month view of calendar is shown in table format and sometimes all the events of a particular day do not get accommodated in that table cell. So does anyone know a jquery plugin for table row resizing?

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  • Drupal User Permissions, Only Allow Specific Users to Edit Specific Pages

    - by jordanstephens
    I know I can set up a role to allow user's to only edit their own pages, then go mark the appropriate pages to be authored by the appropriate user. But then I run into multiple users per page problems. Is there any way that you can explicitly only allow a user to edit certain (perhaps multiple) pages, while accounting for overlap in the case that more than one user may be allowed to edit the same page? Thank you

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  • Print layout of C++ object with g++ compiler

    - by zaheer
    Is there a way to print the layout of a C++ object using the g++ compiler or any other means. A simplified example (assuming int takes 4 bytes) class A{ int a; }; class B:public A{ int b; } so the output would be A - 0 4 + a + B- 0 4 8 + A.a + b + It would be useful to understand the layout of objects (in my case virtual machine code). Thanks in advance. Regards, Zaheer

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  • localstorage vs html5?

    - by Mark
    What's the difference between local/html5 on this page: http://code.google.com/p/jquery-jstore/wiki/DefaultEngines I was under the impression that I could use localstorage on Chrome, but looks like that's not the case? Some elucidation would be greatly appreciated. Thanks.

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  • Python `if x is not None` or `if not x is None`?

    - by orokusaki
    I've always thought of the if not x is None version to be more clear, but Google's style guide implies (based on this excerpt) that they use if x is not None. Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?* *I'm referring to any singleton, rather than just None. ...to compare singletons like None. Use is or is not.

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  • Bi-partitle matching in Python

    - by vailen
    Does anybody know any module in Python that computes the best bi-partite matching? I have tried the following two: munkres hungarian However, in my case, I have to deal with non-complete graph (i.e., there might not be an edge between two nodes), and therefore, there might not be a match if the node has no edge. The above two packages seem not be able to deal with this. Any advise?

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  • Search and replace in apache htaccess a RewriteRule

    - by Paul Irish
    I'd basically like to get /path/file+name+with+plusses.mp3 to rewrite to /path/file name with plusses.mp3 In my case wordpress is intercepting the request and giving a 404. But the file does indeed exist. Given the constraints of the regex in mod_rewrite implementation, I haven't yet seen a straightforward way of doing this.

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  • How to get thread status..in Multi threading..

    - by Qutbuddin Kamaal
    Hi, May be it sound dumb but if I want some computed value from other thread and other value from one more thread and this two value in my main thread how can I,if In case second thread completed before first one.it will create problem..so I just want is there any way that I can get the thread status means its still running or stop. Thanks

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  • Flexible array member in C-structure

    - by Arpan
    Quoting from the C-std section 6.7.2.1, struct s { int n; double d[]; }; This is a valid structure declaration. I am looking for some practical use of this kind of syntax. To be precise, how is this construct any more or less powerful than keeping a double* as the 2nd element? Or is this another case of 'you-can-do-it-in-multiple-ways'? Arpan

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  • Kill unload function in JS?

    - by Newbie
    Hello! Is there a way to kill the unload function with javascript(jquery)? I am looking for something like this: window.onbeforeunload = function(){ confirm("Close?") } or in jquery: $(window).unload(function() { confirm("close?") }); Now, on window unload I get my confirm alert but it will continue in any case. Clicking cancel it won't stay on my page. Can U help me plz?

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  • find: What's up with basename and dirname?

    - by temp2290
    I'm using find for a task and I noticed that when I do something like this: find `pwd` -name "file.ext" -exec echo $(dirname {}) \; it will give you dots only for each match. When you s/dirname/basename in that command you get the full pathnames. Am I screwing something up here or is this expected behavior? I'm used to basename giving you the name of the file (in this case "file.ext") and dirname giving you the rest of the path.

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  • SQL - Conditionally evaluate WHERE clauses

    - by Crimius
    I need to get a WHERE clause to only evaluate certain statements. something like: WHERE field_a = field_b AND (CASE WHEN <PARAM>type</PARAM> = 5 THEN {field_c = 1 OR field_c = 2} WHEN <PARAM>type</PARAM> = 6 THEN {field_c = 3 OR field_c = 4} ELSE field_c = <PARAM>type</PARAM> so that when the Param type = 5, it only checks if field_c = 1 or 2. Any thoughts?

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  • Understanding Scope on Scala's For Loops (For Comprehension)

    - by T. Stone
    In Chapter 3 of Programming Scala, the author gives two examples of for loops / for comprehensions, but switches between using ()'s and {}'s. Why is this the case, as these inherently look like they're doing the same thing? Is there a reason breed <- dogBreeds is on the 2nd line in example #2? // #1 ()'s for (breed <- dogBreeds if breed.contains("Terrier"); if !breed.startsWith("Yorkshire") ) println(breed) // #2 {}'s for { breed <- dogBreeds upcasedBreed = breed.toUpperCase() } println(upcasedBreed)

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  • Check directory for files, retrieve first file

    - by Lowgain
    I'm writing a small ruby daemon that I am hoping will do the following: Check if a specific directory has files (in this case, .yml files) If so, take the first file (numerically sorted preferrably), and parse into a hash Do a 'yield', with this hash as the argument What I have right now is like: loop do get_next_in_queue { |s| THINGS } end def get_next_in_queue queue_dir = Dir[File.dirname(__FILE__)+'/../queue'] info = YAML::load_file(queue_dir[0]) #not sure if this works or not yield info end I'd like to make the yield conditional if possible, so it only happens if a file is actually found. Thanks!

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  • ASP.NET MVC: How to create a basic Pseudo Viewstate? Or better solution?

    - by Mark Redman
    I am newish to MVC and understand all the great things about it, including the reasons why voewstate isnt available, however there are some circumstances where I think having some kind of view state will be quite handy, In my case I am thinking about list pages with various search filters that can be applied to the list. Would it be worthwhile implementing some kind of pseudo viewstate to hold this info in some cases? or is there a better solution? Any examples out there? Your comments appreciated.

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  • iphone shake error

    - by aaa
    Right now I have this- [code] - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event { if (event.type == UIEventSubtypeMotionShake) { int text = rand() % 12; switch (text) { case 0: textview.text = @"blah." ; break;[/code] For some reason, the text has to be selected for it to work. If you just shake it, nothing will happen.

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