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解决:Run-Time Check Failure #0,The value of ESP was not properly sav...

...就可以在定义该函数的时候加上一句话, FAR PASCAL 或者 __stdcall 这个就OK了。 具体做法: 比如说你要定义一个 返回类型为空,参数为空的函数指针: typedef void (*LPFUN)(void); 这样确实跟我们dll里的函数匹配了,上面也说...
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How to set default values in Rails?

... "Correct" is a dangerous word in Ruby. There's usually more than one way to do anything. If you know you'll always want that default value for that column on that table, setting them in a DB migration file is the easiest way: class SetDefault < ActiveRecord::Migration ...
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Understanding generators in Python

...A generator is simply a function which returns an object on which you can call next, such that for every call it returns some value, until it raises a StopIteration exception, signaling that all values have been generated. Such an object is called an iterator. Normal functions return a single value...
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Can someone explain the right way to use SBT?

...tarted, and why? I think the sane point is to build immunity to sbt gradually. Make sure you understand: scopes format {<build-uri>}<project-id>/config:key(for task-key) the 3 flavors of settings (SettingKey, TaskKey, InputKey) - read the section called "Task Keys" in http://www.sc...
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How to Unit test with different settings in Django?

... EDIT: This answer applies if you want to change settings for a small number of specific tests. Since Django 1.4, there are ways to override settings during tests: https://docs.djangoproject.com/en/dev/topics/testing/tools/#overriding-settings TestCase will have a self.settings context ma...
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Determine what attributes were changed in Rails after_save callback?

I'm setting up an after_save callback in my model observer to send a notification only if the model's published attribute was changed from false to true. Since methods such as changed? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as fol...
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关于php的socket初探 - PHP - 清泛IT论坛,有思想、有深度

...塞的古老模型:属于同步阻塞 IO 模型,代码如下: socket_server.php <?php   /** * SocketServer Class * By James.Huang <shagoo#gmail.com> **/   set_time_limit(0);   class SocketServer    {       private stati...
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LINQ - Full Outer Join

... I don't know if this covers all cases, logically it seems correct. The idea is to take a left outer join and right outer join then take the union of the results. var firstNames = new[] { new { ID = 1, Name = "John" }, new { ID = 2, Name = "Sue"...
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How do I remove  from the beginning of a file?

...oks fine when I open it using gedit , but when it's read by PHP (to merge all the CSS files into one), this CSS has the following characters prepended to it:  ...
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Plotting time in Python with Matplotlib

...erstand why this is the 5th question I've encountered where no one has actually TRIED using a scatter plot - it doesn't work. Type Error - invalid type promotion. – dwanderson Oct 5 '16 at 16:21 ...