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How to install a specific version of a ruby gem?
...u is ignored while
the command runs under sudo (such things as GEM_HOME, etc...). So to
reiterate, as soon as you 'sudo' you are running as the root system
user which will clear out your environment as well as any files it
creates are not able to be modified by your user and will result in
...
Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...hing you said is incorrect, about the ints, heap, history, global statics, etc. 0.ReferenceEquals(0) will fail because you are trying to call a method on a compile time constant. there is no object to hang it off. An unboxed int is a struct, stored on the stack. Even int i = 0; i.ReferenceEquals...
How to make an ImageView with rounded corners?
...nt.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
...
How to start working with GTest and CMake
...t is built as part of your main build, so it uses the same compiler flags, etc. and hence avoids problems like the ones described in the question.
There's no need to add the gtest sources to your own source tree.
Used in the normal way, ExternalProject won't do the download and unpacking at config...
通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...以限制的方法呢？答案是有的，方法是通过修改系统的 /etc/security/limits 配置文件。该文件不仅能限制指定用户的资源使用，还能限制指定组的资源使用。该文件的每一行都是对限定的一个描述，格式如下：
<domain> <type> <item>...
In C++, what is a virtual base class?
...l (e.g. typedef, member variable, member function, cast to the base class, etc.). This really is a multiple inheritance issue, an issue that users should be aware to use multiple inheritance correctly, instead of going the Java way and conclude "Multiple inheritance is 100% evil, let's do that with ...
How to check if a value exists in an array in Ruby
...ED_METHODS = Set[:to_s, :to_i, :upcase, :downcase
# etc
]
def foo(what)
raise "Not allowed" unless ALLOWED_METHODS.include?(what.to_sym)
bar.send(what)
end
A quick test reveals that calling include? on a 10 element Set is about 3.5x faster than cal...
Why do we have map, fmap and liftM?
...o-block rather than fmap because it fits in better with when I use liftM2, etc. as well.
– ivanm
Sep 18 '11 at 22:39
1
...
How to send only one UDP packet with netcat?
...ocalhost/8000
and avoid all the idiosyncrasies and incompatibilities of netcat.
This also works sending to other hosts, ex:
echo -n "hello" >/dev/udp/remotehost/8000
These are not "real" devices on the file system, but bash "special" aliases. There is additional information in the Bash Manu...
In Git, how can I write the current commit hash to a file in the same commit
...$Id$ upon check-in.
If you think about it, this is what CVS, Subversion, etc do as well. If you look at the repository, you'll see that the file in the repository always contains, for example, $Id$. It never contains the expansion of that. It's only on checkout that the text is expanded.
...