大约有 47,000 项符合查询结果（耗时：0.0361秒） [XML]
How to initialise memory with new operator in C++?
...ut it actually has special syntax for value-initializing an array:
new int[10]();
Note that you must use the empty parentheses — you cannot, for example, use (0) or anything else (which is why this is only useful for value initialization).
This is explicitly permitted by ISO C++03 5.3.4[expr.new]...
Resizing SVG in html?
...
185
Open your .svg file with a text editor (it's just XML), and look for something like this at th...
What's the difference between echo, print, and print_r in PHP?
...
11 Answers
11
Active
...
Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Linux 操作系统是UNIX 操作系统的一种克隆系统。它诞生于1991 年的10 月5 日（这是第一次正式向外公布的时间...Linux 的诞生和发展
Linux 操作系统是UNIX 操作系统的一种克隆系统。它诞生于1991 年的10 月5 日（这是第一次正式向外公...
How do I check the difference, in seconds, between two dates?
...es, use total_seconds like this:
import datetime as dt
a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(b-a).seconds
0
...
Why does multiprocessing use only a single core after I import numpy?
...
150
After some more googling I found the answer here.
It turns out that certain Python modules (n...
How to deal with SettingWithCopyWarning in Pandas?
I just upgraded my Pandas from 0.11 to 0.13.0rc1. Now, the application is popping out many new warnings. One of them like this:
...
PHP shell_exec() vs exec()
...
|
edited Apr 25 '16 at 22:39
aland
1,52322 gold badges2121 silver badges3939 bronze badges
answ...
How to synchronize a static variable among threads running different instances of a class in Java?
...
194
There are several ways to synchronize access to a static variable.
Use a synchronized static...
What's wrong with using == to compare floats in Java?
...
21 Answers
21
Active
...