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Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...

...函数中抛出异常,不然,我们不得不面对以下两个严重的问题: 二次异常导致程序退出; 遗留下来的未完全销毁的对象与未完成的工作导致的后续问题 pure virtual function call就是这种情况。 但是理想与现实总是有差距的,...
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Detect when browser receives file download

...alue to the token's value. Client source code (JavaScript): function getCookie( name ) { var parts = document.cookie.split(name + "="); if (parts.length == 2) return parts.pop().split(";").shift(); } function expireCookie( cName ) { document.cookie = encodeURIComponent(cName) ...
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How to force vim to syntax-highlight a file as html?

... syntax=<type> where <type> is something like perl, html, php, etc. There is another mechanism that can be used to control syntax highlighting called filetype, or ft for short. Similar to syntax, you give it a type like this: :set filetype=html. Other filetypes are perl, php, etc. Someti...
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Generate random 5 characters string

... generating voucher codes. We removed confusing chars, like l, i, 1, 0, O, etc and out of 500 vouchers got no duplicates. – Luke Cousins Sep 16 '14 at 9:16 ...
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Function to calculate distance between two coordinates

... 这个问题问了JavaScript的答案。. You have to convert it to english :) – VulfCompressor Oct 12 '15 at 15:56 ...
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How do you deal with configuration files in source control?

...ntrol on the config files for each environment, can easily perform a diff, etc. share | improve this answer | follow | ...
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How to get CRON to call in the correct PATHs

... I used /etc/crontab. I used vi and entered in the PATHs I needed into this file and ran it as root. The normal crontab overwrites PATHs that you have set up. A good tutorial on how to do this. The systemwide cron file looks like thi...
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What is the difference between window, screen, and document in Javascript?

... window object and has properties available to it like title, URL, cookie, etc. What does this really mean? That means if you want to access a property for the window it is window.property, if it is document it is window.document.property which is also available in short as document.property. Th...
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How to unit test an object with database queries

...all a method on, in the sense that they have the same properties, methods, etc. available to caller. But instead of performing whatever action they are programmed to do when a particular method is called, it skips that altogether, and just returns a result. That result is typically defined by you a...
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OnInitUpdate、OnUpdate、OnDraw与OnPaint - C/C++ - 清泛网 - 专注C/C++及内核技术

...。 在用户进行输入后如何使视的状态得到更新?这个问题在一个文档对应一个视图时是不存在的,但是现在有一个文档对应了两个视图,当在一个视上进行了 输入时如何保证另一个视也得到通知呢?MFC的做法是利用文档来处...