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How to validate an Email in PHP?
...x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){65,}@)(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22))(?:\\.(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\...
Sharing a result queue among several processes
...n as the result becomes ready.
from multiprocessing import Pool
def busy_foo(i):
"""Dummy function simulating cpu-bound work."""
for _ in range(int(10e6)): # do stuff
pass
return i
if __name__ == '__main__':
with Pool(4) as pool:
print(pool._outqueue) # DEMO
...
Convert xlsx to csv in Linux with command line
...1.xlsx newfile.csv
Using exporter Gnumeric_stf:stf_csv
$ cat newfile.csv
Foo,Bar,Baz
1,2,3
123.6,7.89,
2012/05/14,,
The,last,Line
To install on Ubuntu:
apt-get install gnumeric
To install on Mac:
brew install gnumeric
...
Do sealed classes really offer performance Benefits?
... ecx,183994h (MT: ScratchConsoleApplicationFX4.NormalClass)
003c00b8 e8631fdbff call 00172020 (JitHelp: CORINFO_HELP_NEWSFAST)
003c00bd e80e70106f call mscorlib_ni+0x2570d0 (6f4c70d0) (System.Console.get_Out(), mdToken: 060008fd)
003c00c2 8bc8 mov ecx,eax
003c00c4 8b1...
How do I get a string format of the current date time, in python?
... date=datetime.datetime.now() )
)
d = datetime.datetime.now()
print( "2a: {:%B %d, %Y}".format(d))
# see the f" to tell python this is a f string, no .format
print(f"2b: {d:%B %d, %Y}")
print(f"3: Today is {datetime.datetime.now():%Y-%m-%d} yay")
1: test-2018-02-14_16:40:52.txt
2a: March 0...
How do I declare an array of weak references in Swift?
...e
}
}
And then using these in the array
var weakThings = WeakThing<Foo>[]()
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What does 'wb' mean in this code, using Python?
... Concretely, in Windows for a file opened in text mode, fd.write("foo\n") actually writes on disk foo\r\n (note the \r).
– Serge Ballesta
Aug 21 '14 at 5:48
4
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Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
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下面是管道的创建函数：
#include <unistd.h>
int pipe(int fd[2])
函数参数为一个长度为2的整型数组，fd[0]表示管道的读端，fd[1]表示管道的写端，如果读写端顺序颠倒，将导致错误发生。另外管道的读写及关闭操作均利用一般文件I...
When are you supposed to use escape instead of encodeURI / encodeURIComponent?
.../\./g, "%2E").replace(/\!/g, "%21").replace(/\~/g, "%7E").replace(/\*/g, "%2A").replace(/\'/g, "%27").replace(/\(/g, "%28").replace(/\)/g, "%29");
}
For Decoding URL:
function decodeData(s:String):String{
try{
return decodeURIComponent(s.replace(/\%2D/g, "-").replace(/\%5F/g, "_").rep...
How to detect if my shell script is running through a pipe?
...thetic is piped to cat.
The -t flag is described in man pages as
-t fd True if file descriptor fd is open and refers to a terminal.
... where fd can be one of the usual file descriptor assignments:
0: stdin
1: stdout
2: stderr
...