大约有 47,000 项符合查询结果（耗时：0.0360秒） [XML]
Are there any standard exit status codes in Linux?
...#include <signal.h>
int main() {
int status;
pid_t child = fork();
if (child <= 0)
exit(42);
waitpid(child, &status, 0);
if (WIFEXITED(status))
printf("first child exited with %u\n", WEXITSTATUS(status));
/* prints: "first child exited with 42" ...
When is “i += x” different from “i = i + x” in Python?
... a few cases2.
From an API perspective, __iadd__ is supposed to be used for modifying mutable objects in place (returning the object which was mutated) whereas __add__ should return a new instance of something. For immutable objects, both methods return a new instance, but __iadd__ will put the ...
How to debug heap corruption errors?
...
Application Verifier combined with Debugging Tools for Windows is an amazing setup. You can get both as a part of the Windows Driver Kit or the lighter Windows SDK. (Found out about Application Verifier when researching an earlier question about a heap corruption issue.) I...
What is the purpose of the word 'self'?
...o, or perhaps something yet more different -- but it didn't. Python's all for making things explicit, making it obvious what's what, and although it doesn't do it entirely everywhere, it does do it for instance attributes. That's why assigning to an instance attribute needs to know what instance to...
Breakpoint on property change
Firebug for Firefox has a nice feature, called "Break on property change", where I can mark any property of any object, and it will stop JavaScript execution right before the change.
...
Block Comments in a Shell Script
...
In bash:
#!/bin/bash
echo before comment
: <<'END'
bla bla
blurfl
END
echo after comment
The ' and ' around the END delimiter are important, otherwise things inside the block like for example $(command) will be parsed and executed.
For an expla...
BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...广播方式的报文有4种，分别为可连接的非定向广播（ADV_IND）、可连接的定向广播（ADV_DIRECT_IND）、可扫描非定向广播（ADV_SCAN_IND）、不可连接的非定向广播（ADV_NONCONN_IND）
4种广播的使用场景各不相同
可连接的非定向广播（A...
Annotating text on individual facet in ggplot2
...n my faceted plot. It's the same problem discussed here (groups.google.com/forum/?fromgroups=#!topic/ggplot2/evsbeBT48M4), and was resolved by using annotate("text",...). Does anyone else get blurry labels with geom_text()?
– Margaret
Feb 6 '13 at 21:54
...
jQuery scroll() detect when user stops scrolling
...e jQuery's default on-event-handler. It attaches an event handler function for one or more events to the selected elements and calls the handler function if the event was not triggered for a given interval. This is useful if you want to fire a callback only after a delay, like the resize event, or s...
How to make a class property? [duplicate]
...he value of my classproperty all the time.. (I don't have a cetter defined for my classproperty)
– MagSec
Dec 4 '15 at 10:22
2
...