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Why does GCC generate such radically different assembly for nearly the same C code?
...y as the original fast_trunc_one(). I'll spare you the assembly, but it is identical - register names and all.
Step 2: Mathematical reduction: x + (y ^ x) = y
sign can only take one of two values, 0 or 0x80000000.
When x = 0, then x + (y ^ x) = y then trivial holds.
Adding and xoring by 0x80000000...
What Every Programmer Should Know About Memory?
...r's What Every Programmer Should Know About Memory from 2007 is still valid. Also I could not find a newer version than 1.0 or an errata.
...
u'\ufeff' in Python string
...ning of the code automatically (which is not shown by the text editors) to identify the encoding format. But, when you try to execute the code it gives you the syntax error in line 1 i.e, start of code because python compiler understands ASCII encoding.
when you view the code of file using read() fu...
Fastest way to determine if an integer's square root is an integer
...numbers and looking at the last 4 bits. (I found looking at the last six didn't help.) I also answer yes for 0. (In reading the code below, note that my input is int64 x.)
if( x < 0 || (x&2) || ((x & 7) == 5) || ((x & 11) == 8) )
return false;
if( x == 0 )
return true;
Ne...
Objective-C categories in static library
Can you guide me how to properly link static library to iPhone project. I use static library project added to app project as direct dependency (target -> general -> direct dependencies) and all works OK, but categories. A category defined in static library is not working in app.
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Which timestamp type should I choose in a PostgreSQL database?
...dvice to use TIMESTAMP WITH TIME ZONE for lightweight applications. That said, let me explain some background aspects of this this Option 4 in more detail.
Like Option 3, the reason for the WITH TIME ZONE is because the time at which something happened is an absolute moment in time. WITHOUT TIME ZO...
Why would finding a type's initializer throw a NullReferenceException?
...ole.GetLine() in test.cs to have an opportunity to break in debugger. I validated it doesn’t change the behavior).
We're in this call: 000007fe8d45010c 41ff5228 call qword ptr [r10+28h] (our AV frame ret address is the instruction right after this call).
Lets compare this with what ha...
Is quitting an application frowned upon?
Moving on in my attempt to learn Android, I just read the following :
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How and/or why is merging in Git better than in SVN?
...ing and merge worked in Subversion a while ago. Subversion prior to 1.5.0 didn't store any information about when branches were merged, thus when you wanted to merge you had to specify which range of revisions that had to be merged.
So why did Subversion merges suck?
Ponder this example:
1 ...
How can I perform a culture-sensitive “starts-with” operation from the middle of a string?
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I'll consider the problem of many<->one/many casemappings first and separately from handling different Normalization forms.
For example:
x heiße y
^--- cursor
Matches heisse but then moves cursor 1 too much. And:
x heiss...