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  • push_back private vectors with 2 methods, one isn't working

    - by jmclem
    I have a class with a private vector of doubles. To access or modify these values, at first I used methods such as void classA::pushVector(double i) { this->vector.push_back(i); } double classA::getVector(int i) { return vector[i]; } This worked for a while until I found I would have to overload a lot of operators for what I needed, so I tried to change it to get and set the vector directly instead of the values, i.e. void classA::setVector(vector<double> vector) { this->vector = vector; } vector<double> classA::getVector() { return vector; } Now, say there is a classB, which has a private classA element, which also has get and set methods to read and write. The problem was when I tried to push back a value to the end vector in classA. void classB::setFirstValue(double first) { this->getClassA().getVector().push_back(first); } This does absolutely nothing to the vector. It remains unchanged and I can't figure out why... Any ideas?

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  • byte[] to image android

    - by Sephy
    Hi everybody, My issue is as follows : I have stored a few pictures into the sqlite database, using the blob format, which seems to work ok. now i want to get my pictures out of the DB and put then back into images... to complicate the matter, their format is variable (png, jpg, maybe something else, im not sure) Is there a way of doing so in android? thank you

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  • Passing custom info to mongrel_rails start

    - by whaka
    One thing I really don't understand is how I can pass custom start-up options to a mongrel instance. I see that a common approach is the use environment variables, but in my environment this is not going to work because my rails application serves many different clients. Much code is shared between clients, but there are also many differences which I implement by subclassing controllers and views to overload or extend existing features or introduce new ones. To make this all work, I simply add the paths to client specific modules the module load path ($:). In order to start the application for a particular client, I could now use an environment variable like say, TARGET=AMAZONE. Unfortunately, on some systems I'm running multiple mongrel clusters, each cluster serving a different client. Some of these systems run under Windows and to start mongrel I installed mongrel_services. Clearly, this makes my environment variable unsuitable. Passing this extra bit of data to the application is proving to be a real challenge. For a start, mongrel_rails service_install will reject any [custom] command line parameters that aren't documented. I'm not too concerned as installing the services using the install program is trivial. However, even if I manage to install mongrel_services such that when run it passes the custom command line option --target to mongrel_rails start, I get an error because mongrel_rails doesn't recognize the switch. So here were the things I looked at: Pass an extra parameter: mongrel_rails start --target XYZ ... use a config file and add target:XYZ, then do: mongrel_rails start -C x:\myapp\myconfig.yml modify the file: Ruby\lib\ruby\gems\1.8\gems\mongrel-1.1.5-x86-mswin32-60\lib\mongrel\command.rb Perhaps I can use the --script option, but all docs that I found on it were for Unix 1 and 2 simply don't work. I played with 4 but never managed it to do anything. So I had no choice but to go with 3. While it is relatively simple, I hate changing ruby library code. Particularly disappointing is that 2 doesn't work. I mean what is so unreasonable about adding other [custom] options in the config file? Actually I think this is a fundamental piece that is missing in rails. Somehow, the application should be able to register and access command line arguments it expects. If anybody has a good idea how to do this more elegantly using the current infrastructure, I have a chocolate fish to give away!!!

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  • conversion from C++ to C

    - by Dave
    Hi I am interested by converting some code from C++ to C (mostly because i need to use the library with/from other C program and other language) . C is a better gateway for that I am interested to replicate few C++ concept like inheritance for inst . Does anyone know good references or has already work on some similar issues. For inst how to deal with inheritance , adding new members variable/ methods to child class , ... Thx for your help

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  • PHP+MySQL Update TimeStamp and get NOW() back

    - by Ben
    Is it possible to merge these two mysql queries into one? I want to get NOW() returned to a php variable. mysql_query('INSERT INTO translate (IDRef, RefType, Lang, Text, LastChangeTS) VALUES ('.$id.', \''.$reftype.'\', \''.$lang.'\', \''.$text.'\', NOW()) ON DUPLICATE KEY UPDATE text = \''.$text.'\', LastChangeTS = NOW()'); mysql_query('SELECT LastChangeTS FROM translate WHERE IDRef = '.$id.' AND RefType = \''.$reftype.'\' AND Lang = \''.$lang.'\'');

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  • Realtime MySQL search results on an advanced search page

    - by Andrew Heath
    I'm a hobbyist, and started learning PHP last September solely to build a hobby website that I had always wished and dreamed another more competent person might make. I enjoy programming, but I have little free time and enjoy a wide range of other interests and activities. I feel learning PHP alone can probably allow me to create 98% of the desired features for my site, but that last 2% is awfully appealing: The most powerful tool of the site is an advanced search page that picks through a 1000+ record game scenario database. Users can data-mine to tremendous depths - this advanced page has upwards of 50 different potential variables. It's designed to allow the hardcore user to search on almost any possible combination of data in our database and it works well. Those who aren't interested in wading through the sea of options may use the Basic Search, which is comprised of the most popular parts of the Advanced search. Because the advanced search is so comprehensive, and because the database is rather small (less than 1,200 potential hits maximum), with each variable you choose to include the likelihood of getting any qualifying results at all drops dramatically. In my fantasy land where I can wield AJAX as if it were Excalibur, my users would have a realtime Total Results counter in the corner of their screen as they used this page, which would automatically update its query structure and report how many results will be displayed with the addition of each variable. In this way it would be effortless to know just how many variables are enough, and when you've gone and added one that zeroes out the results set. A somewhat similar implementation, at least visually, would be the Subtotal sidebar when building a new custom computer on IBuyPower.com For those of you actually still reading this, my question is really rather simple: Given the time & ability constraints outlined above, would I be able to learn just enough AJAX (or whatever) needed to pull this one feature off without too much trouble? would I be able to more or less drop-in a pre-written code snippet and tweak to fit? or should I consider opening my code up to a trusted & capable individual in the future for this implementation? (assuming I can find one...) Thank you.

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  • how to substitute in html

    - by kshama
    hi , I had a simple doubt. In the href below i want to pass the value of content_id which is a variable ,not content_id as string. <a href="http://localhost:3000/welcome/details?id=content_id">details</a> How do i do it? Thanks in advance

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  • mysql innodb:innodb_flush_method

    - by Daniel
    in the following link http://dev.mysql.com/doc/refman/5.1/en/innodb-parameters.html#sysvar_innodb_flush_method it says:Different values of this variable can have a marked effect on InnoDB performance. For example, on some systems where InnoDB data and log files are located on a SAN, it has been found that setting innodb_flush_method to O_DIRECT can degrade performance of simple SELECT statements by a factor of three. Why O_DIRECT could slow down the select statement?

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  • iPhone SDK: How to determine keyboard type within a UIKeyboardDidShowNotification?

    - by iPhone Developer
    Hello, I need to know the current keyboard type. I was setting an instance variable in - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField However, testing has shown that this is not always reliable because of the asynchronous nature of notifications. What I am wondering is if anyone can tell me how to determine the current keyboard type within a notification? - (void)keyboardDidShow:(NSNotification *) { // Need way to determine keyboard type here } Thanks.

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  • LINK : fatal error LNK1104: cannot open file '.obj'

    - by FL3SH
    I have a big problem with building a simple program. I am using many tutorials, instructions and I can't solve it. I edit the variable's path as follows: C/C++-General-Additionals Include Directories-MyOpenCv\build\include Linker-General-Additionals Library Directories-MyOpenCv\build\x86\vc11\lib Linker-Input-Additional Dependencies-*I added .libs The same in Debug and Release.Windows 8 x64, VS2012 x32, OpenCV 2.4.5

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  • Python get raw_input but manually decide when string is done

    - by Jasie
    I want someone to type words in the console, and autocomplete from a list when they hit "tab" key. However, raw_input won't return a string until someone hits [Enter]. How do I read characters into a variable until the user hits [Enter]? *Note: I don't want to use import readline for autocompletion because of OS issues.

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  • Using pydev with Eclipse on OSX

    - by Sunit
    I setup PyDev with this path for the python interpreter /System/Library/Frameworks/Python.framework/Versions/2.5/Python since the one under /usr/bin were alias and Eclipse won't select it. I can run my python script now but cannot run the shell as an external tool. The message I get is variable references empty selection ${resource_loc} Same if I use {container_loc} Any thoughts ? Sunit

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  • Get main article image with PHP

    - by PaulAdamDavis
    Hello! I'd like to get the main image for an article, much like Facebook does when you post a link (but without the choosing image part). The data we have to work with is the whole pages HTML as a variable. The page & URL will be different for every time this function runs. Are there any libraries or classes that are particularly good at getting the main body of content, much like Instapaper that would be of any help?

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  • Include a tpl file with variables (Smarty)

    - by user1640660
    I have a "links.tpl" file which contains lines with many variables such as below {assign var=link_main value="index.php"} {assign var=link_login value="?a=login"} but when i include this file in home.tpl using {include file="file.tpl"} the variables {$link_main}, {$link_login} are not included i put the {assign var=link_main value="index.php"} in home.tpl and it works but not from included file i have tried adding scope=global to variable and parent to include but nothing happened I tried the last few hours finding a solution, any help is appreciated

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