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What are the Ruby Gotchas a newbie should be warned about? [closed]
... "joe" # true
"joe" === "bob" # false
# but ranges match any value they include
(1..10) === 5 # true
(1..10) === 19 # false
(1..10) === (1..10) # false (the range does not include itself)
# arrays just match equal arrays, but they do not match included values!
[1,2,3] === [1,2,3] #...
How to set downloading file name in ASP.NET Web API
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Doesn't cover escaping. What if the file name includes a ; or something else with a special meaning?
– Sam
Jun 22 '15 at 4:54
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Simple regular expression for a decimal with a precision of 2
...n ()? to make it optional. Be aware that this excludes forms such as 12. Including that would be more like ^\d+\\.?\d{0,2}$.
Added
Use ^\d{1,6}(\.\d{1,2})?$ to stop repetition and give a restriction to whole part of the decimal value.
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How to implement the activity stream in a social network
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How do I add files without dots in them (all extension-less files) to the gitignore file?
...s mentioned below by Mad Physicist, the rule is:
It is not possible to re-include a file if a parent directory of that file is excluded. (*)
(*: unless certain conditions are met in git 2.?+, see below)
That is why !/**/ is important (white-listing the parent folders recursively) if we want to whi...
Difference between class and type
...a type. An array is a type.
Therefore, every type is also either a class (including an enum constant), an interface, a primitive, or an array.
There are two distinct categories of types: primitive types and reference types:
A variable of primitive type always holds a primitive value of that same...
Why does SIGPIPE exist?
...program[1] -- you've got the guts already, all you need is a main and some includes -- and add a signal handler for SIGPIPE. Run a pipeline like
cat | B | more
and in another terminal window, attach a debugger to B and put a breakpoint inside the B signal handler.
Now, kill the more and B sh...
iOS5 Storyboard error: Storyboards are unavailable on iOS 4.3 and prior
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What is more efficient? Using pow to square or just multiply it with itself?
...ance difference between x*x*... vs pow(x,i) for small i using this code:
#include <cstdlib>
#include <cmath>
#include <boost/date_time/posix_time/posix_time.hpp>
inline boost::posix_time::ptime now()
{
return boost::posix_time::microsec_clock::local_time();
}
#define TEST(nu...
How to detect when cancel is clicked on file input?
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