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How to compare versions in Ruby?
...s it's not Ruby 1.x vs 2.x; it's 1.8.x vs 1.9+. Ruby through 1.8.x doesn't include rubygems by default; you need a require 'rubygems' to get access to the Gem namespace. From 1.9 on, however, it's automatically included.
– Mark Reed
Feb 12 '14 at 14:35
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Getting Chrome to accept self-signed localhost certificate
...herment
subjectAltName = @alt_names
[alt_names]
DNS.1 = $NAME # Be sure to include the domain name here because Common Name is not so commonly honoured by itself
DNS.2 = bar.$NAME # Optionally, add additional domains (I've added a subdomain here)
IP.1 = 192.168.0.13 # Optionally, add an IP address (...
Frequency table for a single variable
...s such
[my_series[c].value_counts() for c in list(my_series.select_dtypes(include=['O']).columns)]
Breakdown:
my_series.select_dtypes(include=['O'])
Selects just the categorical data
list(my_series.select_dtypes(include=['O']).columns)
Turns the columns from above into...
Operation on every pair of element in a list
... how they differ:
product() generates every possible pairing of elements, including all duplicates:
1,1 1,2 1,3 1,4
2,1 2,2 2,3 2,4
3,1 3,2 3,3 3,4
4,1 4,2 4,3 4,4
permutations() generates all unique orderings of each unique pair of elements, eliminating the x,x duplicates:
. 1,2...
Comment the interface, implementation or both?
...a specific: when documenting the implementation, use {@inheritDoc} tag to "include" javadocs from the interface.
For more information:
Official javadoc documentation
Some unofficial advice.
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Hidden features of Eclipse [closed]
... buddy, ctrl-shift-t, to open a resource or type, respectively. Resources includes all files in your open projects (including non-java files), and types includes java types either in your projects, or in a library included in the projects.
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Rails respond_with: how does it work?
...Rails 4.2 (release notes / commit dated Aug 2014). While responders is not included in Rails by default, it is a dependency of Devise, and thus available in many Rails applications.
The #respond_to instance method, however, is still a part of Rails (5.2rc1 as of this writing).
The official Rails A...
How can I declare and define multiple variables in one line using C++?
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As of 2k18, you can use Structured Bindings:
#include <iostream>
#include <tuple>
int main ()
{
auto [hello, world] = std::make_tuple("Hello ", "world!");
std::cout << hello << world << std::endl;
return 0;
}
Demo
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Why is std::min failing when windows.h is included?
What is windows doing if I include Windows.h? I can't use std::min in visual studio 2005. The error message is:
10 Answer...