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Allowed characters in Linux environment variable names
...iable names? My cursory search of man pages and the web did only produce information about how to work with variables, but not which names are allowed.
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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 open a new window on form submit
I have a submit form and want it to open a new window when users submits the form so i can track it on analytics.
9 Answers...
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...
How can I use threading in Python?
...itely check out (no affiliation) - Parallelism in one line: A Better Model for Day to Day Threading Tasks. I'll summarize below - it ends up being just a few lines of code:
from multiprocessing.dummy import Pool as ThreadPool
pool = ThreadPool(4)
results = pool.map(my_function, my_array)
Which is t...
Python 2.7: Print to File
...
print(args, file=f1) is the python 3.x syntax.
For python 2.x use print >> f1, args.
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What is the best practice for “Copy Local” and with project references?
... improve build times. I think that "Copy Local" is wasteful in many cases for us, but I am wondering about best practices.
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How to get URL of current page in PHP [duplicate]
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$_SERVER['REQUEST_URI']
For more details on what info is available in the $_SERVER array, see the PHP manual page for it.
If you also need the query string (the bit after the ? in a URL), that part is in this variable:
$_SERVER['QUERY_STRING']
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Finding a substring within a list in Python [duplicate]
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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...
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
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