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How to loop backwards in python? [duplicate]
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for x in reversed(whatever):
do_something()
This works on basically everything that has a defined order, including xrange objects and lists.
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imp...
How do I output an ISO 8601 formatted string in JavaScript?
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See the last example on page https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference:Global_Objects:Date:
/* Use a function for the exact format desired... */
function ISODateString(d) {
function pad(n) {return n<10 ? '0'+n : n}
return d.getUTCFullYear()+'-'
+ pa...
Print list without brackets in a single row
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@FredrickGauss if you add from __future__ import print_function it'll work in python 2 as well.
– Anthony Sottile
Aug 26 '17 at 22:07
1
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How to extract the n-th elements from a list of tuples?
...htly slower than the list comprehension:
setup = 'elements = [(1,1,1) for _ in range(100000)];from operator import itemgetter'
method1 = '[x[1] for x in elements]'
method2 = 'map(itemgetter(1), elements)'
import timeit
t = timeit.Timer(method1, setup)
print('Method 1: ' + str(t.timeit(100)))
t = t...
Scala: write string to file in one statement
....write(Paths.get("file.txt"), "file contents".getBytes(StandardCharsets.UTF_8))
I think this is by far the simplest and easiest and most idiomatic way, and it does not need any dependencies sans Java itself.
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What is a regular expression for a MAC Address?
...perty \p{xdigit} includes the FULLWIDTH versions. You might prefer \p{ASCII_Hex_Digit} instead.
The answer to the question asked might be best answered — provided you have a certain venerable CPAN module installed — by typing:
% perl -MRegexp::Common -lE 'say $RE{net}{MAC}'
I show the partic...
Proper way to handle multiple forms on one page in Django
... BannedPhraseForm(request.POST, prefix='banned')
if bannedphraseform.is_valid():
bannedphraseform.save()
else:
bannedphraseform = BannedPhraseForm(prefix='banned')
if request.method == 'POST' and not bannedphraseform.is_valid():
expectedphraseform = ExpectedPhraseForm(request.PO...
Splitting templated C++ classes into .hpp/.cpp files--is it possible?
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You can do it in this way
// xyz.h
#ifndef _XYZ_
#define _XYZ_
template <typename XYZTYPE>
class XYZ {
//Class members declaration
};
#include "xyz.cpp"
#endif
//xyz.cpp
#ifdef _XYZ_
//Class definition goes here
#endif
This has been discussed in Daniweb
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ValueError: setting an array element with a sequence
...9 when building an array of objects (not necessarily lists) that implement __getitem__ as specified here:github.com/numpy/numpy/issues/5100
– dashesy
Nov 21 '14 at 19:13
add a...
Converting from IEnumerable to List [duplicate]
...to a Generic List.
//ArrayList Implements IEnumerable interface
ArrayList _provinces = new System.Collections.ArrayList();
_provinces.Add("Western");
_provinces.Add("Eastern");
List<string> provinces = _provinces.Cast<string>().ToList();
If you're using Generic version IEnumerable&...