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How do I declare a 2d array in C++ using new?

... A dynamic 2D array is basically an array of pointers to arrays. You can initialize it using a loop, like this: int** a = new int*[rowCount]; for(int i = 0; i < rowCount; ++i) a[i] = new int[colCount]; The above, for colCount= 5 and rowCount =...
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Boost Statechart vs. Meta State Machine

... As there seems to be much interest, please allow me to give my (obviously biased) opinion, which should therefore be taken with a grain of salt: MSM is much faster MSM requires no RTTI or anything virtual MSM has a more complete UML2 support (for example internal tr...
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How to use the 'main' parameter in package.json?

...t to your program. That is, if your package is named foo, and a user installs it, and then does require("foo"), then your main module's exports object will be returned. This should be a module ID relative to the root of your package folder. For most modules, it makes the most sense...
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Typical .gitignore file for an Android app

... You can mix Android.gitignore: # built application files *.apk *.ap_ # files for the dex VM *.dex # Java class files *.class # generated files bin/ gen/ # Local configuration file (sdk path, etc) local.properties with Eclipse.gitignore: *.pydevproject .project .metadata bin/** tmp/** ...
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Is there any particular difference between intval and casting to int - `(int) X`?

... behavior is a little surprising given the fact that the function theoretically can do base conversion. It definitely tripped me up before, but perhaps I just need to RTFM a bit more carefully :) – t-dub Feb 10 '12 at 17:07 ...
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What does .SD stand for in data.table in R

.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it? ...
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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术

...   为了强化这个原则,ØMQ严格地分离拓扑的建立(zmq_bind,zmq_connect)和真实消息的传递(zmq_send,zmq_rev)。 前者同底层的传输地址协同工作,比如IP地址,而后者仅仅使用处理器(文件描述符)去定位具体的拓扑: /* Topology esta...
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Laravel: Get base url

...\UrlGenerator; class Classname { protected $url; public function __construct(UrlGenerator $url) { $this->url = $url; } public function methodName() { $this->url->to('/'); } } ...
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Toggle Checkboxes on/off

... You can write: $(document).ready(function() { $("#select-all-teammembers").click(function() { var checkBoxes = $("input[name=recipients\\[\\]]"); checkBoxes.prop("checked", !checkBoxes.prop("checked")); }); }); Before jQuery 1.6, when we only ...
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Integrating the ZXing library directly into my Android application

...de so it hopefully can help others with the same problem as I had ;) Install Apache Ant - (See this YouTube video for config help) Download the ZXing source from ZXing homepage and extract it With the use of Windows Commandline (Run->CMD) navigate to the root directory of the downloaded zxing s...