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  • MongoDB initialization error in Rails

    - by rube_noob
    I have an initialization script to set up my MongoDB connection in the config/initialization directory. It is my understanding that these initializers run after all of the plugins are initialized. The problem I am having is that when a particular plugin I am using is initialized, it tries to access the mongodb before I have set it up. I get this error: uninitialized class variable @@database_name in MongoMapper My question is: Where can I initialize Mongodb that will run after the mongodb gem has been loaded and before any of the plugins are initialized?

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  • Using gdb with GMP variables

    - by Full Decent
    I am debugging some C code with gdb. My program has a variable of type mpz_t * retval. If I run the command print *retval I get the output $23 = {{ _mp_alloc = 6, _mp_size = 5, _mp_d = 0x1001008d0 }} Is there anything else I can do to get more information about the value stored in retval?

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  • Convert 64bit Binary to Long equivalent

    - by washtik
    How can we convert the following 64 bit binary into the long equivalent; 01111101 10100011 01001111 11111111 11111111 11111111 11111111 11000000 equals 7D A3 4F FF FF FF FF C0 HEX equals 9053167636875050944 << this is the value we want in a C# variable

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  • Check if BigInteger is not a perfect square

    - by Ender
    I have a BigInteger value, let's say it is 282 and is inside the variable x. I now want to write a while loop that states: while b2 isn't a perfect square: a ? a + 1 b2 ? a*a - N endwhile How would I do such a thing using BigInteger? EDIT: The purpose for this is so I can write this method. As the article states one must check if b2 is not square.

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  • Pass a value to an inFrame

    - by user106707
    This probably an easy thing to do but for some reason I can't get a handle on it. I have a simple form that allows people to select one if three items for sale. When they chose their item I need to pass that variable into an iFrame with a third party checkout page to safely process their cc transaction. How would I do this? Cheers-

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  • Implementing dynamic scope when using CPS as intermediate language

    - by asandroq
    I am currently studying the implementation of programming languages and became interested in using Continuation-Passing Style as the intermediate language of the compiler. I also want to implement limited dynamic scope (for exception-handling or Scheme parameter objects) but I cannot find the relevant literature. I think it can be done with a separate environment passed as a variable to every closure, but this solution seems ugly to me. Could anyone point me to the relevant literature, or give me an idea of how this can be done?

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  • javascript scoping in for loop

    - by user121196
    consider the following javascript code, console.log always prints "focus 1" where 2 is the input length. how should I rewrite the code to prints the looping variable i correctly for (var i = 0; i < inputs.length; i++) { var curIndex = i; inputs[i].addListener('focus', function(thisfield, evt){ console.log('focus '+curIndex); }); }

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  • Javascript objects: get parent

    - by Dänu
    Hey Guys I got some question about nested javascript objects (is it me, google or is javascript quite poorly documented?). Now, I got the following (nested) object: obj: { subObj: { 'hello world' } }; next thing I do is to reference the subobject like this: var s = obj.subObj; now what I would like to do, is to get a reference to the object obj out of the variable s. Something like: var o = s.parent; Is this somehow possible?

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  • Numeric operations over SHA-1 generated keys in C#

    - by webdreamer
    I'm trying to implement a Chord distributed hash table. I want to use SHA-1 as the hash function to generate node ids and map values to the DHT. However, I'll need to use numerical operations on the SHA-1 generated key, such as a modulo, for example. I wonder in which type of variable should I put the array of bytes I get, and how can I convert from one to another.

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  • Evenly distibuted scatterViewItems that dont overlap

    - by Christo Fur
    Hi I have an app that creates a variable number of ScatterviewItems based on which tagged object is placed on the surface table. The ScatterViewItems are added programatically to the ScatterView based on info looked up in a DB The Scatterview does a good job of displaying this info However, I would like them to be evenly distributed across the table and not have any items overlapping Any ideas how to do that?

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  • how to get ip address of my computer

    - by asthagoyal
    hello i want to get ipaddress of my computer in variable ip thru this code but it assign nothing in ip char comm[100]; int s=0; char ip[100]; sprintf(comm,"export ip=`/sbin/ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`"); s=system(comm); printf("\n ip is %s",ip);

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  • which is the most secure way to check variables type javascript

    - by mck89
    Hi, i need to check the type of a variable in javascript, i know 3 ways to do it: instanceof operator: if(a instanceof Function) typeof operator: if(typeof a=="function" toString method (jQuery uses this): Object.prototype.toString.call(a) == "[object Function]" Which is the most secure way to do type checking beetween these solutions? and why? Please don't tell me that the last solution is better only because jQuery uses that.

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  • Howto ignore specific undefined variables in Pydev (eclipse)

    - by chris.nullptr
    I'm writing a crossplatform python script on windows using Eclipse with the Pydev plugin. The script makes use of the os.symlink() and os.readlink() methods if the current platform isn't NT. Since the os.symlink() and os.readlink() methods aren't available on the windows platform Pydev flags them as undefined variables--like so: Is there a way to explicitly ignore certain undefined variable name errors (e.g. os.symlink())?

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  • PHP Load variables from external file

    - by Adrian M.
    Hello, How can I import a variable from an external file? What I want to do is to have a configuration file in which I can write all my website settings and then to import these settings to every file, so I can set the website skin and things like that.. How can I do this? Thanks!

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  • How to get ref of an array in PHP 5 ?

    - by Relax
    In php 5, all variable and objects are passed by reference, but i can't get my codes work My codes is: $arrayA = array(); $array = $arrayA; ... if(!in_array(thedata, $array) // if i use & to get ref, got an error here, should i use *$array here? $array[] = thedata; var_dump($arrayA); The result is empty, am i missing something simple?

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  • Can I make ruby send network traffic over a specific iface?

    - by rjorgenson
    I am writing a script that grabs the external IP address along with some other information about each iface. I can't figure out how to make ruby send traffic over a specific iface(eth0 and wlan0 for example). I am currently using the open-uri library to open http://whatismyip.org and read it into a variable. def get_external_ip begin open("http://whatismyip.org") { |f| return f.read } rescue return "none" end end Is there any way to specify this at runtime of the script or from within the script itself(ideally)?

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  • Facebooker2 template issue

    - by Srini
    Hi, When i include fb_connect_async_js javascript helper it is throwing an error , Facebooker 2 don't have action view template. Could you please tell me how handle this situation . undefined local variable or method `fb_connect_async_js' for ActionView::Base Thanks, Srini

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  • Java - Runtime.getRuntime().exec() what's going on?

    - by kunkanwan
    Hi, I have problem with Runtime.exec() in Java My code: String lol = "/home/pc/example.txt"; String[] b = {"touch", lol}; try { Runtime.getRuntime().exec(b); } catch(Exception ex) { doSomething(ex); } It's working good but when I trying changle variable "lol" files doesn't create in hard disk for instance: String lol = x.getPath(); where getPath() returns String What should I do ? Thanks for your reply :)

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  • Why does this JSON.parse code not work?

    - by SuZi
    I am trying to pass json encoded values from a php script to a, GnuBookTest.js, javascript file that initiates a Bookreader object and use the values i have passed in via the variable i named "result". The php script is sending the values like: <div id="bookreader"> <div id="BookReader" style="left:10px; right:10px; top:30px; bottom:30px;">x</div> <script type="text/javascript">var result = {"istack":"zi94sm65\/BUCY\/BUCY200707170530PM","leafCount":"14","wArr":"[893,893,893,893,893,893,893,893,893,893,893,893,893,893]","hArr":"[1155,1155,1155,1155,1155,1155,1155,1155,1155,1155,1155,1155,1155,1155]","leafArr":"[0,1,2,3,4,5,6,7,8,9,10,11,12,13]","sd":"[\"RIGHT\",\"LEFT\",\"RIGHT\",\"LEFT\",\"RIGHT\",\"LEFT\",\"RIGHT\",\"LEFT\",\"RIGHT\",\"LEFT\",\"RIGHT\",\"LEFT\",\"RIGHT\",\"LEFT\"]"}</script> <script type="text/javascript" src="http://localhost:8080/application/js/GnuBookTest.js"></script> </div> </div> and in the GnuBookTest.js file i am trying to use the values like: br = new BookReader(); // Return the width of a given page. br.getPageWidth = function(index) { return this.pageW[index]; } // Return the height of a given page. br.getPageHeight = function(index) { return this.pageH[index]; } br.pageW = JSON.parse(result.wArr); br.pageH = JSON.parse(result.hArr); br.leafMap = JSON.parse(result.leafArr); //istack is an url fragment for location of image files var istack = result.istack; . . . Using JSON.parse as i have written it above loads the Bookreader and uses my values correctly in a few web-browsers: Firefox, IE8, and desktop-Safari; but does not work at all in mac-Chrome, mobile-Safari, plus older versions of IE. Mobile safari keeps giving me a reference error msg: can't find variable: JSON. The other browsers just do not load the Bookreader and show the "x" instead, like they did not get the values from the php script. Where is the problem?

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  • problem with printf() function

    - by Syom
    i have the variable $a = 5; i want to show it in binary form, with length, equal 8, with writing * at white spaces, just like this, like this * * * * *101 here the script $number = 5; printf("%*8b", $number); it doesn't work with *, but if "0"-s it works printf("%08b", $number); //returns 00000101 why it doesn't work with *?

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