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What exactly does an #if 0 … #endif block do?
...tax error! Why? Because block comments do not nest, and so (as you can see from SO's syntax highlighting) the */ after the word "NULL" terminates the comment, making the baz call not commented out, and the */ after baz a syntax error. On the other hand:
#if 0
foo();
bar(x, y); /* x must not be NULL...
How can I use Bash syntax in Makefile targets?
...
From the GNU Make documentation,
5.3.1 Choosing the Shell
------------------------
The program used as the shell is taken from the variable `SHELL'. If
this variable is not set in your makefile, the program `/bin/sh' is
us...
What is the difference between char * const and const char *?
... @supercat (oh, C-only, sorry for the C++ code link, I got here from a C++ question) It's all about the C declaration syntax, with a ("pure") type part followed by a declarator. In "int const *foo, *volatile bar" the type part is int const (stops before the *) and the declarators are *foo...
IEnumerable and Recursion using yield return
...provided you with the correct answer, but I don't think your case benefits from yielding.
Here's a snippet which achieves the same without yielding.
public static IEnumerable<Control> GetDeepControlsByType<T>(this Control control)
{
return control.Controls
.Where(...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...
False is a bool. It has a different type. It is a different object from 0 which is an integer.
0 == False returns True because False is cast to an integer. int(False) returns 0
The python documentation of the == operator says (help('==')):
The operators <, >, ==, >=, <=, an...
Get the first element of an array
... to get the key: (execute it after reset)
echo key($arr); // Echoes "4"
From PHP's documentation:
mixed reset ( array &$array );
Description:
reset() rewinds array's internal pointer to the first element and returns the value of the first array element, or FALSE if the array is
em...
Python's time.clock() vs. time.time() accuracy?
...ure, the TC timeout expired and the test case was aborted. I had to switch from time.time() to time.clock() to handle this properly.
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Can anyone explain this strange behavior with signed floats in C#?
...rectly treats -0.0 as equal to 0.0.
Here is the source for CanCompareBits from SSCLI:
FCIMPL1(FC_BOOL_RET, ValueTypeHelper::CanCompareBits, Object* obj)
{
WRAPPER_CONTRACT;
STATIC_CONTRACT_SO_TOLERANT;
_ASSERTE(obj != NULL);
MethodTable* mt = obj->GetMethodTable();
FC_RETUR...
String.Empty versus “” [duplicate]
How is String.Empty different from "" ?
5 Answers
5
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How to initialise a string from NSData in Swift
I have been trying to initialise a string from NSData in Swift.
7 Answers
7
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