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Why is `std::move` named `std::move`?
...).
So what does move do in terms of generated object code?
Consider this test:
void
test(int& i, int& j)
{
i = j;
}
Compiled with clang++ -std=c++14 test.cpp -O3 -S, this produces this object code:
__Z4testRiS_: ## @_Z4testRiS_
.cfi_startproc
## BB#0:...
Why use strict and warnings?
... separator.
use strict 'subs';
Consider two programs
# prog 1
$a = test_value;
print "First program: ", $a, "\n";
sub test_value { return "test passed"; }
Output: First program's result: test_value
# prog 2
sub test_value { return "test passed"; }
$a = test_value;
print "Sec...
Does using “new” on a struct allocate it on the heap or stack?
...re slightly different again. To show all these differences, here's a short test program. It doesn't show the difference between static variables and instance variables: the IL would differ between stfld and stsfld, but that's all.
using System;
public class Test
{
static Guid field;
stati...
What's a good way to extend Error in JavaScript?
...e object that is being thrown. Those things are guaranteed to be correct.
Test cases I used can be found here: JavaScript self-made Error object comparison.
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How to iterate through two lists in parallel?
...on.
import timeit
import matplotlib.pyplot as plt
import numpy as np
def test_zip( foo, bar ):
store = []
for f, b in zip(foo, bar):
#print(f, b)
store.append( (f, b) )
def test_enumerate( foo, bar ):
store = []
for n, f in enumerate( foo ):
#print(f, bar[...
class
...a single object.
Example:
class SomeClass
class << self
def test
end
end
end
test_obj = SomeClass.new
def test_obj.test_2
end
class << test_obj
def test_3
end
end
puts "Singleton's methods of SomeClass"
puts SomeClass.singleton_methods
puts '-----------------------...
Default filter in Django admin
...in):
def changelist_view(self, request, extra_context=None):
test = request.META['HTTP_REFERER'].split(request.META['PATH_INFO'])
if test[-1] and not test[-1].startswith('?'):
if not request.GET.has_key('decommissioned__exact'):
q = request.GET.cop...
How to get parameters from a URL string?
...s all the variables into an associative array.
$url = "https://mysite.com/test/1234?email=xyz4@test.com&testin=123";
$query_str = parse_url($url, PHP_URL_QUERY);
parse_str($query_str, $query_params);
print_r($query_params);
//Output: Array ( [email] => xyz4@test.com [testin] => 123 )
...
Remove not alphanumeric characters from string
....g.:
input.replace(/[^0-9a-z]/gi, '')
The input is malformed
Since the test string contains various escaped chars, which are not alphanumeric, it will remove them.
A backslash in the string needs escaping if it's to be taken literally:
"\\test\\red\\bob\\fred\\new".replace(/\W/g, '')
"testredb...
Referring to the null object in Python
... Python; instead there's None. As stated already, the most accurate way to test that something has been given None as a value is to use the is identity operator, which tests that two variables refer to the same object.
>>> foo is None
True
>>> foo = 'bar'
>>> foo is None
F...