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Why does GCC generate such radically different assembly for nearly the same C code?
... only two possible values that sign can take:
sign = 0
sign = 0x80000000
Now recognize that in both cases, sign == -sign. Therefore, when I change the original code to this:
int fast_trunc_one(int i) {
int mantissa, exponent, sign, r;
mantissa = (i & 0x07fffff) | 0x800000;
exponen...
Converting a UNIX Timestamp to Formatted Date String
...eTime();
To create a DateTime object from a specific timestamp (i.e. not now)
$currentTime = DateTime::createFromFormat( 'U', $timestamp );
To get a formatted string you can then call
$formattedString = $currentTime->format( 'c' );
See the manual page here
...
Why is volatile not considered useful in multithreaded C or C++ programming?
...mpiler. If the compiler understands the semantics of a memory barrier, it knows to avoid tricks like that (as well as reordering reads/writes across the barrier). And luckily, the compiler does understand the semantics of a memory barrier, so in the end, it all works out. :)
– ...
What is a reasonable code coverage % for unit tests (and why)? [closed]
...The first programmer is new and just getting started with testing.
Right now he has a lot of code and no
tests. He has a long way to go;
focusing on code coverage at this time
would be depressing and quite useless.
He’s better off just getting used to
writing and running some tests. He...
What are the Dangers of Method Swizzling in Objective-C?
... calls that, but the _cmd argument isn't setFrame: like it should be. It's now my_setFrame:. The original implementation is being called with an argument it never expected it would receive. This is no good.
There's a simple solution — use the alternative swizzling technique defined above. The arg...
What does MVW stand for?
...but over time and thanks to many refactorings
and api improvements, it's now closer to MVVM – the $scope object
could be considered the ViewModel that is being decorated by a
function that we call a Controller.
Being able to categorize a framework and put it into one of the MV*
bucket...
Why is a round-trip conversion via a string not safe for a double?
...s
... you get the same results as with Mono. It would be interesting to know whether the bug shows up under RyuJIT - I don't have that installed at the moment myself. In particular, I can imagine this possibly being a JIT bug, or it's quite possible that there are whole different implementations o...
Import error: No module name urllib2
...tml = urlopen("http://www.google.com/").read()
print(html)
Your current, now-edited code sample is incorrect because you are saying urllib.urlopen("http://www.google.com/") instead of just urlopen("http://www.google.com/").
...
Ruby on Rails Server options [closed]
...ytes) and sends it back over the socket.
However Mongrel is quite dated, nowadays it is no longer maintained. Newer alternative application servers are:
Phusion Passenger
Unicorn
Thin
Puma
Trinidad (JRuby only)
TorqueBox (JRuby only)
I'll cover them later and describe how they differ from each...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...erstandable selection if you choose four registers for arguments.
I don't know why the AMD64 UN*X ABI chose RDX before RCX.
Choosing six argument registers on x64 - UN*X specific
UN*X, on RISC architectures, has traditionally done argument passing in registers - specifically, for the first six argum...