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采花大盗速成秘籍之YQL - 人工智能(AI) - 清泛IT论坛,有思想、有深度

...像和谐的社会一样,从未真正存在过,除了少数开放了API的网站,更多的时候,我们只能通过采集来获得数据,于是诞生了采花大盗。 通常,要成为采花大盗的话必须熟悉正则,但对很多人来说,这是一个不低的技术门槛,不...
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Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 爬虫/数据库 - 清...

...,这个方法不能恢复你的数据。my.ini的设置为 innodb_file_per_table = 1。参考 http://blog.chinaunix.net/uid-24111901-id-2627876.html1、找回表结构,如果表结构没有丢失直接到下一步 a、先创建一个数据库,这个数据库必须是没有表和任何操作...
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VS工程“生成事件”之文件拷贝 - c++1y / stl - 清泛IT社区,为创新赋能!

...行: 拷单文件至Debug/Release目录(支持*通配符): copy "$(ProjectDir)lib\P*APID.dll" "$(SolutionDir)$(ConfigurationName)\"   拷文件夹: xcopy /D /Y /E "$(ProjectDir)conf" "$(SolutionDir)$(ConfigurationName)\conf\" (...
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预编译头文件来自编译器的早期版本,或者预编译头为 C++ 而在 C 中使用它(...

现象&原因: 当 Visual C++ 项目启用了预编译头 (Precompiled header) 功能时,如果项目中同时混合有 .c 和 .cpp 源文件,则可能收到 C1853 编译器错误:fatal error C1853: 'pjtname.pch' precompiled header file is from a previous version of the compiler, or the...
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sizeof、strlen简单总结 - C/C++ - 清泛IT论坛,有思想、有深度

sizeof strlen const char* p 4 字符串长度 std::string 4 字符串长度 "......" 字符串长度+1   ('\0') 字符串长度
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Set value to NULL in MySQL

I want a value to be set to NULL if nothing is put into the text box in the form I'm submitting. How can I make this happen? I've tried inserting 'NULL' but this just adds the word NULL into the field. ...
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Removing first x characters from string?

How might one remove the first x characters from a string? For example, if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ? ...
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How to read a large file - line by line?

... The correct, fully Pythonic way to read a file is the following: with open(...) as f: for line in f: # Do something with 'line' The with statement handles opening and closing the file, including if an exception is raised in the i...
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Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...

...,这个方法不能恢复你的数据。my.ini的设置为 innodb_file_per_table = 1。 参考 http://blog.chinaunix.net/uid-24111901-id-2627876.html 1、找回表结构,如果表结构没有丢失直接到下一步 a、先创建一个数据库,这个数据库必须是没有表和任何...
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Undo scaffolding in Rails

... already run the migrations generated by the scaffold command, you have to perform a rollback first. rake db:rollback You can create scaffolding using: rails generate scaffold MyFoo (or similar), and you can destroy/undo it using rails destroy scaffold MyFoo That will delete all the files...