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(![]+[])[+[]]… Explain why this works
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Performance difference for control structures 'for' and 'foreach' in C#
...the lists indexer is implemented. As it turns out the enumerator for types based on arrays are normally written something like this:
private static IEnumerable<T> MyEnum(List<T> list)
{
for (int i = 0; i < list.Count; i++)
{
yield return list[i];
}
}
So as you c...
Flatten nested dictionaries, compressing keys
...a kind of a "functional", "one-liner" implementation. It is recursive, and based on a conditional expression and a dict comprehension.
def flatten_dict(dd, separator='_', prefix=''):
return { prefix + separator + k if prefix else k : v
for kk, vv in dd.items()
for k, v...
ASP.NET MVC RequireHttps in Production Only
...bit, and my VB is fairly rusty. All I know is that it compiles. I wrote it based on the suggestions of spot, queen3, and Lance Fisher. If it doesn't work, it should at least convey the general idea, and give you starting point.
Public Class RemoteRequireHttpsAttribute
Inherits System.Web.Mvc.Re...
Mocking python function based on input arguments
... mock. This allows you to vary the return
value of the call dynamically, based on the input:
>>> def side_effect(value):
... return value + 1
...
>>> m = MagicMock(side_effect=side_effect)
>>> m(1)
2
>>> m(2)
3
>>> m.mock_calls
[call(1), call(2)]
...
Rails I18n validation deprecation warning
....0.0-p247@application/gems/authlogic-3.1.0/lib/authlogic/acts_as_authentic/base.rb:37:in `include'",
"/Users/weppos/.rvm/gems/ruby-2.0.0-p247@application/gems/authlogic-3.1.0/lib/authlogic/acts_as_authentic/base.rb:37:in `block in acts_as_authentic'",
"/Users/weppos/.rvm/gems/ruby-2.0.0-p247@appli...
Do a “git export” (like “svn export”)?
... You're right. I'd forgotten that I was using git config url.<base>.insteadOf to cache the remote repository. I was therefore using a file:// URL in reality. I doubt that git archive could ever work with git:// URLs since it needs to be able to run git-upload-archive at the remote en...
Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
...
el.tag = postfix # strip all namespaces
root = it.root
This is based on the discussion here:
http://bugs.python.org/issue18304
Update: rpartition instead of partition makes sure you get the tag name in postfix even if there is no namespace. Thus you could condense it:
for _, el in it:
...
Is there a way to 'uniq' by column?
...
To consider multiple column.
Sort and give unique list based on column 1 and column 3:
sort -u -t : -k 1,1 -k 3,3 test.txt
-t : colon is separator
-k 1,1 -k 3,3 based on column 1 and column 3
share
...
CMake: Print out all accessible variables in a script
...
based on @sakra
function(dump_cmake_variables)
get_cmake_property(_variableNames VARIABLES)
list (SORT _variableNames)
foreach (_variableName ${_variableNames})
if (ARGV0)
unset(MATCHED)
...