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Creating temporary files in bash
...
The mktemp(1) man page explains it fairly well:
Traditionally, many shell scripts take the name of the program with
the pid as a suffix and use that as a temporary file name. This kind
of naming scheme is predictable and the race condition it creates is
easy for an attacker t...
Is there a performance difference between CTE , Sub-Query, Temporary Table or Table Variable?
...s not seem to take advantage of this basic optimization method (you might call this common subquery elimination).
Temporary tables are a different matter, because you are providing more guidance on how the query should be run. One major difference is that the optimizer can use statistics from the ...
How can I make an svg scale with its parent container?
...the element should have a width of 100%, but a height of 50px, it will actually only scale up to the height of 50px (unless you have a very narrow window):
<svg width="100%" height="50px" viewBox="0 0 20 10">
<polygon fill=red stroke-width=0
points="0,10 20,10 10,0" />...
Git, How to reset origin/master to a commit?
...
Agreed, had to do this today after accidentally merging the wrong branches together then pushing to origin. It works well, but it could be very disruptive if other people have been checking out the affected branches from origin. Use with caution.
...
Should I use static_cast or reinterpret_cast when casting a void* to whatever
...ore type safety and just cast from A to B”.
However, this doesn’t actually describe the effect of a reinterpret_cast. Rather, reinterpret_cast has a number of meanings, for all of which holds that “the mapping performed by reinterpret_cast is implementation-defined.” [5.2.10.3]
But in the ...
How to remove gaps between subplots in matplotlib?
...s the subplots from stretching to an arbitrary aspect ratio and filling up all the empty space.
Normally, this would work:
import matplotlib.pyplot as plt
ax = [plt.subplot(2,2,i+1) for i in range(4)]
for a in ax:
a.set_xticklabels([])
a.set_yticklabels([])
plt.subplots_adjust(wspace=0,...
Auto-loading lib files in Rails 4
.../foo.rb:
class Foo
end
in lib/foo/bar.rb:
class Foo::Bar
end
if you really wanna do some monkey patches in file like lib/extensions.rb, you may manually require it:
in config/initializers/require.rb:
require "#{Rails.root}/lib/extensions"
P.S.
Rails 3 Autoload Modules/Classes by Bill H...
Why does this code segfault on 64-bit architecture but work fine on 32-bit?
...o int* masks the fact that without the proper #include the return type of malloc is assumed to be int. IA-64 happens to have sizeof(int) < sizeof(int*) which makes this problem obvious.
(Note also that because of the undefined behaviour it could still fail even on a platform where sizeof(int)==...
What do the f and t commands do in Vim?
... information but people keep telling me that they are very useful. Would really appreciate an answer with an example if possible, thanks!
...
Literal notation for Dictionary in C#?
...gt; object first as the shortcut syntax is translated to a bunch of Add() calls (like your code):
var data = new Dictionary<string, string>
{
{ "test", "val" },
{ "test2", "val2" }
};
In C# 6, you now have the option of using a more intuitive syntax with Dictionary as well as any o...