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How do function pointers in C work?
...\xc3 <- This swaps the values of a and b";
Compiling with gcc -c -m32 foo.c and disassembling with objdump -D -rwC -Mintel, we can get the assembly, and find out that this code violates the ABI by clobbering EBX (a call-preserved register) and is generally inefficient.
00000000 <swap>:
...
Best Practices: Salting & peppering passwords?
...t harder than people realize, and it's quite easy to shoot yourself in the foot. For 99.9% of the users out there, raw bcrypt is more than sufficient for all but the simplest passwords...
– ircmaxell
Jun 4 '13 at 14:56
...
Is null reference possible?
... you have another file user.cpp with the code
#include "converter.h"
void foo() {
int& nullRef = toReference(nullptr);
cout << nullRef; //crash happens here
}
the compiler does not know that toReference() will dereference the passed pointer, and assume that it returns a valid ...
Why not use tables for layout in HTML? [closed]
...t;h1>Some Text</h1> and then in their css: h1 { background-image('foo.jpg'); text-indent:-3000px }? This is the correct way of doing it because you're retaining maximum semantic information in the style-less html. Or maybe I misunderstood you.
– Karan
...
How to export revision history from mercurial or git to cvs?
...ort depends on cvs Initialized empty Git repository in /Users/gus/projects/foo/foobar/.git/ Can't exec "cvsps": No such file or directory at /Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git-cvsimport line 777. Could not start cvsps: No such file or directory git cvsimport: fatal: ...
What is polymorphism, what is it for, and how is it used?
...
Polyp is short for polypo(u)s. And pous is foot in greek. ;-)
– Dirk
Oct 12 '16 at 14:21
2
...
Catching an exception while using a Python 'with' statement
...s from the open call vs the working code you could do:
try:
f = open('foo.txt')
except IOError:
print('error')
else:
with f:
print f.readlines()
share
|
improve this answer
...
Asserting successive calls to a mock method
.... Each function call receives a tuple of (args, kwargs), so to check that "foo(123)" was called correctly, you need to "assert mock.call_args == ((123,), {})", which is a mouthful compared to "call(123)"
– Jonathan Hartley
Jan 25 '16 at 20:52
...
What are the differences between Autotools, Cmake and Scons?
...ts out, it gets busted all to hell with an improperly framed CFLAGS = "<foo>" in the makefile. Quite simply this is another one of those "old saw" items. And the CMake examples are bogus...again... You can do the first if you're not specifying RELEASE or DEBUG. FAIL.
–...
OO Design in Rails: Where to put stuff
...urable
...
end
class Model
include Indexable
end
# controllers/foo_controller.rb
class FooController < ApplicationController
include Indexable
end
# controllers/bar_controller.rb
class BarController < ApplicationController
include Indexable
end
/lib is my preferred choice fo...