大约有 4,200 项符合查询结果（耗时：0.0237秒） [XML]
How to get my IP address programmatically on iOS/macOS?
...hUTF8String:addrBuf];
}
}
}
// Free memory
freeifaddrs(interfaces);
}
return [addresses count] ? addresses : nil;
}
EDIT1: Code updated on May 16, 2014 (bug pointed out by lhunath, see comments). Loopback addresses now returned, but its e...
Does PHP have threading?
...re. pthreads does not adjust the refcount of the variable, Zend is able to free the original data if there are no further references to it.
(2) The argument to someOperation references the object store, the original data stored, which it itself a copy of the result of (1), is copied again for the e...
Is there a REAL performance difference between INT and VARCHAR primary keys?
...7500U CPU @ 2.70GHz × 4
15.6 GiB RAM, of which I ensured around 8 GB was free during the test.
148.6 GB SSD drive, with plenty of free space.
Ubuntu 16.04 64-bit
MySQL Ver 14.14 Distrib 5.7.20, for Linux (x86_64)
The tables:
create table jan_int (data1 varchar(255), data2 int(10), myindex tinyi...
Dynamic type languages versus static type languages
...guage. Statically typed languages strictly could be said to not be context free. The simple truth is that it becomes inconvenient to express a language sanely in context free grammars that doesn't treat all its data simply as bit vectors. Static type systems are part of the grammar of the language i...
Simulate limited bandwidth from within Chrome?
...
A warning: Charles is not free
– Charlie
Oct 23 '13 at 16:35
8
...
How to exit from the application and show the home screen?
...
never use this, because it gets no chance to free resources
– LiangWang
Aug 13 '13 at 4:41
1
...
Do you (really) write exception safe code? [closed]
...even be sure, that it is?
Writing exception-safe code is like writing bug-free code.
You can't be 100% sure your code is exception safe. But then, you strive for it, using well-known patterns, and avoiding well-known anti-patterns.
Do you know and/or actually use alternatives that work?
There are...
How can we match a^n b^n with Java regex?
... we anticipate having a more complicated pattern, let's use x modifier for free-spacing so we can make our regex more readable.
Building on our previous PHP snippet, we now have the following pattern:
$r2 = '/ ^ a+ (?= (b+) ) /x';
# │ └──┘ │
# │ 1 │
# ...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
...《服务协议》 关注公众号，精彩不错过！ #free_v { border:none; position:fixed; top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
Detect application heap size in Android
... your app currently uses:
long usedMemory=runtime.totalMemory() - runtime.freeMemory();
Getting how much of the heap your app can now use (available memory) :
long availableMemory=maxMemory-usedMemory;
And, to format each of them nicely, you can use:
String formattedMemorySize=Formatter.forma...