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How do I forward declare an inner class? [duplicate]
...want, but here is a workaround, if you are willing to use templates:
// Foo.h
struct Foo
{
export template<class T> void Read(T it);
};
// Foo.cpp
#include "Foo.h"
#include "Container.h"
/*
struct Container
{
struct Inner { };
};
*/
export template<>
void Foo::Read<...
Git: can't undo local changes (error: path … is unmerged)
... the file, then checkout, to revert local changes.
Try this:
$ git reset foo/bar.txt
$ git checkout foo/bar.txt
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Extract every nth element of a vector
...ady mentioned) is to use a short logical vector and use vector recycling:
foo[ c( rep(FALSE, 5), TRUE ) ]
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UNIX export command [closed]
...t are marked for export. If you set a variable at the command-line like
$ FOO="bar"
That variable will not be visible in child processes. Not unless you export it:
$ export FOO
You can combine these two statements into a single one in bash (but not in old-school sh):
$ export FOO="bar"
Here...
Rails - link_to helper with data-* attribute [duplicate]
... in... Rails has a default :data hash
= link_to body, url, :data => { :foo => 'bar', :this => 'that' }
One gotcha - you must surround symbols with quotes if they include a dash:
:data => { :'foo-bar' => 'that' }
Update: In Rails 4, underscores are automatically converted to dash...
When and why should I use a namedtuple instead of a dictionary? [duplicate]
...nces of a class like:
class Container:
def __init__(self, name, date, foo, bar):
self.name = name
self.date = date
self.foo = foo
self.bar = bar
mycontainer = Container(name, date, foo, bar)
and not change the attributes after you set them in __init__, you cou...
设置用户默认权限 Umask命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...后演示的方便性，先在Windows上用7-zip创建两个文件：
foo.zip（包括：目录foo_dir，文件foo_file）
bar.tar（包括：目录bar_dir，文件bar_file）
当然，你可以不用Windows，我之所以这样做，只是为了稍后抖个包袱而已。
把这两个文件...
How to copy a file from one directory to another using PHP?
Say I've got a file test.php in foo directory as well as bar . How can I replace bar/test.php with foo/test.php using PHP ? I'm on Windows XP, a cross platform solution would be great but windows preferred.
...
How to Store Historical Data
...original table for the current, active record. So, let's say I have table FOO. Under my system, all active records will go in FOO, and all historical records will go in FOO_Hist. Many different fields in FOO can be updated by the user, so I want to keep an accurate account of everything updated. ...
How do I Moq a method that has an optional argument in its signature without explicitly specifying i
...ice right now is to explicitly include the bool parameter in the setup for Foo.
I don't think it defeats the purpose of specifying a default value. The default value is a convenience for calling code, but I think that you should be explicit in your tests. Say you could leave out specifying the bool...