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How much faster is Redis than mongoDB?
...on you can adapt to your purposes, I was looking at how well each would perform simply setting/retrieving values:
#!/usr/bin/env python2.7
import sys, time
from pymongo import Connection
import redis
# connect to redis & mongodb
redis = redis.Redis()
mongo = Connection().test
collection = mong...
Variable interpolation in the shell
...cause you're trying to do string interpolation, and you need double quotes for that
– michaelsnowden
Oct 3 '15 at 22:12
...
How do I find the location of Python module sources?
How do I learn where the source file for a given Python module is installed? Is the method different on Windows than on Linux?
...
Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
...1).keys()].map(i => i + 'A'.charCodeAt(0)));
=> "ABCD"
Iteration
for (const x of Array(5).keys()) {
console.log(x, String.fromCharCode('A'.charCodeAt(0) + x));
}
=> 0,"A" 1,"B" 2,"C" 3,"D" 4,"E"
As functions
function range(size, startAt = 0) {
return [...Array(size).keys()].ma...
How to set the prototype of a JavaScript object that has already been instantiated?
...ject itself, rather is reflected when that object is used as a constructor for other objects, and has no use in changing the prototype of an existing object.
function myFactory(){};
myFactory.prototype = someOtherObject;
var newChild = new myFactory;
newChild.__proto__ === myFactory.prototype === ...
SSMS插件开发指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...Data\Application Data\Microsoft\MSEnvShared\Addins\)
Will install add-in for all users on the machine.
Putting SSMSAddin.addin into %APPDATA%\Microsoft\MSEnvShared\Addins\
(C:\Users\UserName\AppData\Roaming\Microsoft\MSEnvShared\Addins\)
will install for specific user only.
OnConnecti...
Finding a substring within a list in Python [duplicate]
...
print [s for s in list if sub in s]
If you want them separated by newlines:
print "\n".join(s for s in list if sub in s)
Full example, with case insensitivity:
mylist = ['abc123', 'def456', 'ghi789', 'ABC987', 'aBc654']
sub = 'a...
How can I create directory tree in C++/Linux?
...
#include <string.h>
/* "sysstat.h" == <sys/stat.h> with fixup for (old) Windows - inc mode_t */
#include "sysstat.h"
typedef struct stat Stat;
static int do_mkdir(const char *path, mode_t mode)
{
Stat st;
int status = 0;
if (stat(path, &st) != 0...
Split data frame string column into multiple columns
I'd like to take data of the form
15 Answers
15
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How do I parallelize a simple Python loop?
...
Using multiple threads on CPython won't give you better performance for pure-Python code due to the global interpreter lock (GIL). I suggest using the multiprocessing module instead:
pool = multiprocessing.Pool(4)
out1, out2, out3 = zip(*pool.map(calc_stuff, range(0, 10 * offset, o...