大约有 43,000 项符合查询结果（耗时：0.0401秒） [XML]
“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
...uses the same variable name. It is also a major security risk with register_globals turned on. E_NOTICE level error is issued in case of working with uninitialized variables, however not in the case of appending elements to the uninitialized array. isset() language construct can be used to detect if...
C# 5 async CTP: why is internal “state” set to 0 in generated code before EndAwait call?
... int num3 = state;
if (num3 == 1)
{
goto Label_ContinuationPoint;
}
if (state == -1)
{
return;
}
t = new SimpleAwaitable();
i = 0;
Label_ContinuationPoint:
while (i < 3)
{
//...
Parse JSON String into a Particular Object Prototype in JavaScript
...ant to. That's all I'm sayin'. I was really looking for the one-liner: x.__proto__ = X.prototype; (although it's not IE browser compatible at this time)
– BMiner
May 3 '11 at 18:56
...
Passing base64 encoded strings in URL
...
en.wikipedia.org/wiki/Base64#URL_applications — it says clearly that escaping ‘makes the string unnecessarily longer’ and mentions the alternate charset variant.
– Michał Górny
Sep 3 '09 at 23:02
...
Change auto increment starting number?
In MySQL, I have a table, and I want to set the auto_increment value to 5 instead of 1 . Is this possible and what query statement does this?
...
What is the advantage of GCC's __builtin_expect in if else statements?
I came across a #define in which they use __builtin_expect .
6 Answers
6
...
Python decorators in classes
...
Would something like this do what you need?
class Test(object):
def _decorator(foo):
def magic( self ) :
print "start magic"
foo( self )
print "end magic"
return magic
@_decorator
def bar( self ) :
print "normal call"
test ...
What's the difference between :: (double colon) and -> (arrow) in PHP?
...called or a subclass of it.
Example:
class A {
public function func_instance() {
echo "in ", __METHOD__, "\n";
}
public function callDynamic() {
echo "in ", __METHOD__, "\n";
B::dyn();
}
}
class B extends A {
public static $prop_static = 'B::$prop_st...
Flattening a shallow list in Python [duplicate]
...ndexable sequence, consider itertools.chain and company.
>>> list_of_menuitems = [['image00', 'image01'], ['image10'], []]
>>> import itertools
>>> chain = itertools.chain(*list_of_menuitems)
>>> print(list(chain))
['image00', 'image01', 'image10']
It will work...
How do I detect unsigned integer multiply overflow?
...thing>;
int x = <something>;
if ((x > 0) && (a > INT_MAX - x)) /* `a + x` would overflow */;
if ((x < 0) && (a < INT_MIN - x)) /* `a + x` would underflow */;
// For subtraction
#include <limits.h>
int a = <something>;
int x = <something>;
if...