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Why do people say there is modulo bias when using a random number generator?
...and I decide to generate a random number between 0 and 2 by calling rand()%3. However, rand()%3 does not produce the numbers between 0 and 2 with equal probability!
When rand() returns 0, 3, 6, or 9, rand()%3 == 0. Therefore, P(0) = 4/11
When rand() returns 1, 4, 7, or 10, rand()%3 == 1. Therefor...
Auto-loading lib files in Rails 4
...zers/require.rb:
require "#{Rails.root}/lib/extensions"
P.S.
Rails 3 Autoload Modules/Classes by Bill Harding.
And to understand what does Rails exactly do about auto-loading?
read Rails autoloading — how it works, and when it doesn't by Simon Coffey.
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How to split the name string in mysql?
... as middle_name,
SUBSTRING_INDEX(SUBSTRING_INDEX(fullname, ' ', 3), ' ', -1) AS last_name
FROM registeredusers
This second method considers the middle name as part of the lastname. We will only select a firstname and lastname column from your fullname field.
SELECT
SUBSTRING_INDEX(...
How to find the duration of difference between two dates in java?
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answered Nov 10 '13 at 6:58
user1386522user1386522
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How to use Git properly with Xcode?
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136
I have worked on iPhone applications full time since the SDK launch, most of that time spent wo...
Conditions for automatic generation of default/copy/move ctor and copy/move assignment operator?
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Functions that return a function
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Assigning a variable to a function (without the parenthesis) copies the reference to the functio...
Rails how to run rake task
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132
You can run Rake tasks from your shell by running:
rake task_name
To run from from Ruby (e.g...
How do I set up email confirmation with Devise?
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Python append() vs. + operator on lists, why do these give different results?
..., a little history: the birth of the array module in Python in February 1993. it might surprise you, but arrays were added way after sequences and lists came into existence.
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