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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
... like = and =~.
In Bashese: [ is a built-in command, and [[ is a keyword: https://askubuntu.com/questions/445749/whats-the-difference-between-shell-builtin-and-shell-keyword
<
[[ a < b ]]: lexicographical comparison
[ a \< b ]: Same as above. \ required or else does redirection like for...
Best way to create custom config options for my Rails app?
...nt Rails env.
If you do not want to use a yaml file
As Rails official guide says:
You can configure your own code through the Rails configuration object with custom configuration under the config.x property.
Example
config.x.payment_processing.schedule = :daily
config.x.payment_processin...
Best introduction to C++ template metaprogramming? [closed]
...80201309775; and chapter 17, "Metaprograms" of C++ Templates: The Complete Guide by David Vandevoorder and Nicolai M. Josuttis, ISBN-13: 9780201734843.
Todd Veldhuizen has an excellent tutorial here.
A good resource for C++ programming in general is Modern C++ Design by Andrei Alexandrescu, I...
Integrating the ZXing library directly into my Android application
...is can be used for URLs too, but string
// must include "http://" or "https://".
public static final String TEXT = "TEXT_TYPE";
// An email type. Use Intent.putExtra(DATA, string) where string is the email address.
public static final String EMAIL = "EMAIL_TYPE";
...
Capybara Ambiguity Resolution
...specifics because they've been discussed above already.
More resources:
https://thoughtbot.com/blog/write-reliable-asynchronous-integration-tests-with-capybara
https://makandracards.com/makandra/20829-threads-and-processes-in-a-capybara-selenium-session
...
Strings as Primary Keys in SQL Database [closed]
...t is what you should use. I would also say there are definitely times for GUID or UUID fields in databases where an autoincrement field would not work.
– Ryan Guill
Feb 5 '09 at 20:16
...
Acronyms in CamelCase [closed]
...efinitively not clear for all test cases.
e.g.
how do you read this word HTTPSSLRequest, HTTP + SSL, or HTTPS + SL (that doesn't mean anything but...), in that case follow camel case convention and go for httpSslRequest or httpsSlRequest, maybe it is no longer nice, but it is definitely more clear...
Deprecated warning for Rails 4 has_many with order
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to rollback just one step using rake db:migrate
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
SQL select join: is it possible to prefix all columns as 'prefix.*'?
...tered`, `campaigns`.`post_parent` AS `campaigns.post_parent`, `campaigns`.`guid` AS `campaigns.guid`, `campaigns`.`menu_order` AS `campaigns.menu_order`, `campaigns`.`post_type` AS `campaigns.post_type`, `campaigns`.`post_mime_type` AS `campaigns.post_mime_type`, `campaigns`.`comment_count` AS `camp...