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How to generate and validate a software license key?
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Caveat: you can't prevent users from pirating, but only make it easier for honest users to do the right thing.
Assuming you don't want to do a special build for each user, then:
Generate yourself a secret key for the product
Take the user's name
Concaten...
Read input from console in Ruby?
...found in ARGV and only asks to console if not ARGV found. To force to read from console even if ARGV is not empty use STDIN.gets
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Calling virtual functions inside constructors
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Calling virtual functions from a constructor or destructor is dangerous and should be avoided whenever possible. All C++ implementations should call the version of the function defined at the level of the hierarchy in the current constructor and no f...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
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Yes,
it is possible,
we can generate regexes from examples (text -> desired extractions).
This is a working online tool which does the job: http://regex.inginf.units.it/
Regex Generator++ online tool generates a regex from provided examples using a GP search algorit...
Disable ActiveRecord for Rails 4
...ew my_app -O
For existing applications:
1. Remove database adapter gems from your Gemfile (mysql2, sqlite3, etc.)
2. Change your config/application.rb
Remove require 'rails/all line and require frameworks (among those available in your rails version, the list varies, do not just copy) you want ...
Error - trustAnchors parameter must be non-empty
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btw this happens e.g. when switching from OracleJDK8 to OpenJDK8 since OpenJDK comes with an empty trust store. Copying the one from OpenJDK11 fixes the problem
– light_303
Nov 13 '18 at 9:38
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Token Authentication vs. Cookies
...kie in every response back to the client. This means the next request made from the client will include this cookie and will thus be recognized by the server. This way the server can maintain a session with the stateless client, knowing mostly everything about the app's state, but stored in the serv...
Play audio from a stream using C#
Is there a way in C# to play audio (for example, MP3) direcly from a System.IO.Stream that for instance was returend from a WebRequest without saving the data temporarily to the disk?
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Why is it recommended to have empty line in the end of a source file?
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Apart from the fact that it is a nicer cursor position when you move to the end of a file in a text editor.
Having a newline at the end of the file provides a simple check that the file has not been truncated.
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How to check if variable is string with python 2 and 3 compatibility
...'re writing 2.x-and-3.x-compatible code, you'll probably want to use six:
from six import string_types
isinstance(s, string_types)
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