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What does a lazy val do?
...oized defs. You can read about the details of their implementation here:
http://docs.scala-lang.org/sips/pending/improved-lazy-val-initialization.html
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How to generate all permutations of a list?
...e just curious to know how it works, here's one nice approach, taken from http://code.activestate.com/recipes/252178/:
def all_perms(elements):
if len(elements) <=1:
yield elements
else:
for perm in all_perms(elements[1:]):
for i in range(len(elements)):
...
Markup XML解析库下载（Markup.h 和 Markup.cpp） - 源码下载 - 清泛网 - 专注C/C++及内核技术
...ight (C) 2009 First Objective Software, Inc. All rights reserved
// Go to www.firstobject.com for the latest CMarkup and EDOM documentation
// Use in commercial applications requires written permission
// This software is provided "as is", with no warranty.
#if !defined(_MARKUP_H_INCLUDED_)
#...
How can I get enum possible values in a MySQL database?
...)
For more information on the str_getcsv function, check the PHP manual:
http://uk.php.net/manual/en/function.str-getcsv.php
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How to copy a directory structure but only include certain files (using windows batch files)
..._TO_COPY) do set %%p=
cls
echo :: Copy Files Including Folder Tree
echo :: http://stackoverflow.com
rem /questions/472692/how-to-copy
rem -a-directory-structure-but-only
rem -include-certain-files-using-windows
echo :: ReScripted by r4k4
echo.
if "%1"=="" goto :NoParam
if "%2"=="" goto :...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...iveRecord::Base.logger = Logger.new(STDOUT);end..got this from comments in http://weblog.jamisbuck.org/2007/1/8/watching-activerecord-do-it-s-thing
– rubyprince
Oct 24 '11 at 8:45
...
How to render a DateTime object in a Twig template
...,'medium') }} to have a long date and medium time, in the current locale
https://github.com/michelsalib/BCCExtraToolsBundle
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C++: const reference, before vs after type-specifier
...
No difference
http://c-faq.com/ansi/constptrconst.html
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cartesian product in pandas
...
2 2 4 5
3 2 4 6
See here for the documentation: http://pandas.pydata.org/pandas-docs/stable/merging.html#brief-primer-on-merge-methods-relational-algebra
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What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time?
...
TimeSpan.FromSeconds(80);
http://msdn.microsoft.com/en-us/library/system.timespan.fromseconds.aspx
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