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Hidden features of Ruby
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From Ruby 1.9 Proc#=== is an alias to Proc#call, which means Proc objects can be used in case statements like so:
def multiple_of(factor)
Proc.new{|product| product.modulo(factor).zero?}
end
case number
when multiple_of...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
...a figure which may consist of many axes. Additionally, there are functions from the pyplot interface and there are methods on the Figure class. I will discuss both cases below.
pyplot interface
pyplot is a module that collects a couple of functions that allow matplotlib to be used in a functional ...
Hash Map in Python
...user for an input. depending on his input I am retrieving some information from the HashMap. If the user enters a key of the HashMap, I would like to retrieve the corresponding value.
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Razor view engine, how to enter preprocessor(#if debug)
...sing this, probably because in Release mode the debug attribute is removed from web.config entirely.
– Alex Angas
Feb 27 '14 at 3:55
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How to create a remote Git repository from a local one?
...lly you just say git push origin master. Now any other repository can pull from the remote repository.
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What happens if you static_cast invalid value to enum class?
... What is color set to according to the standard?
Answering with a quote from the C++11 and C++14 Standards:
[expr.static.cast]/10
A value of integral or enumeration type can be explicitly converted to an enumeration type. The value is unchanged if the original value is within the range of th...
Sorting arraylist in alphabetical order (case insensitive)
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@seethalakshmi that's the strings from your list. Please take a look at the sources of Collections.sort method if you want to get more details on that
– denis.solonenko
Apr 28 '11 at 8:02
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Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 爬虫/数据库 - 清...
...开始执行 import tablespace，报错 ERROR 1030 (HY000): Got error -1 from storage engine。找到mysql的错误日志，InnoDB: Error: tablespace id in file ‘.\test\weibo_qq0.ibd’ is 112, but in the InnoDB InnoDB: data dictionary it is 1. 因为 weibo_qq0 之前的记录点在112，当前的...
How can I test https connections with Django as easily as I can non-https connections using 'runserv
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Now when you want to run your development server just execute ./runserver from your project directory. To try it out, just point your browser to http://localhost:8000 for normal HTTP traffic, and https://localhost:8443 for HTTPS traffic. Note that you're browser will almost definitely complain ab...
What is a loop invariant?
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Thanks very much for this answer! The biggest take from it is the purpose of having this loop invariant is to help prove the correctness of the algorithm. The other answers only focus on what is a loop invariant!
– Neekey
Dec 5 '18 at 12...