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Safely override C++ virtual functions
...ake the compiler check if the function I declared in the derived class actually overrides a function in the base class? I would like to add some macro or something that ensures that I didn't accidentally declare a new function, instead of overriding the old one.
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EF Migrations: Rollback last applied migration?
This looks like a really common task, but I can't find an easy way to do it.
14 Answers
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Python - Count elements in list [duplicate]
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len(myList) should do it.
len works with all the collections, and strings too.
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require file as string
...ondering how I can import any file as a string. Lets say I have a txt file all I want is to load it into a variable as such.
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How to print the contents of RDD?
...save in a single file, you can coalesce you RDD into one partition before calling saveAsTextFile, but again this may cause issues. I think the best option is to write in multiple files in HDFS, then use hdfs dfs --getmerge in order to merge the files
– Oussama
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Can Flask have optional URL parameters?
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You can try pip install flask_optional_routes. I created a pip for the functionality you are requesting b/c I needed it as well. The code is located at: github.com/sudouser2010/flask_optional_routes.
– sudouser2010
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lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...lua的运行环境，相关接口如下：
//创建lua运行上下文
lua_State* luaL_newstate(void) ;
//加载lua脚本文件
int luaL_loadfile(lua_State *L, const char *filename);
lua和c/c++的数据交互通过"栈"进行 ,操作数据时，首先将数据拷贝到"栈"上，然后获取...
Convert Base64 string to an image file? [duplicate]
... data in the function before decoding the string, like so.
function base64_to_jpeg($base64_string, $output_file) {
// open the output file for writing
$ifp = fopen( $output_file, 'wb' );
// split the string on commas
// $data[ 0 ] == "data:image/png;base64"
// $data[ 1 ] == &l...
How to find what code is run by a button or element in Chrome using Developer Tools
...ess the F11 key (Step In) until desired source code appears
Source code finally reached
In the jsFiddle sample provided above, I had to press F11 108 times before reaching the desired event handler/function
Your mileage may vary, depending on the version of jQuery (or framework library) used to bi...
Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
...1.4, not in 1.5, and not in 1.7. If you had it in there, it was added manually by someone - it is not added by django-admin startproject.
– wim
Oct 11 '16 at 16:54
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