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How does the HyperLogLog algorithm work?
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The main trick behind this algorithm is that if you, observing a stream of random integers, se...
Is there a way to iterate over a range of integers?
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Detect when an HTML5 video finishes
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You can add an event listener with 'ended' as first param
Like this :
<video src="video.og...
Simple proof that GUID is not unique [closed]
...g threads. It is licensed under the following terms: you must pay me $0.0001 per hour per CPU core you run it on. Fees are payable at the end of each calendar month. Please contact me for my paypal account details at your earliest convenience.
using System;
using System.Collections.Generic;
using S...
What column type/length should I use for storing a Bcrypt hashed password in a Database?
...Encoding alphabet) consisting of:
22 characters of salt (effectively only 128 bits of the 132 decoded bits)
31 characters of encrypted output (effectively only 184 bits of the 186 decoded bits)
Thus the total length is 59 or 60 bytes respectively.
As you use the 2a format, you’ll need 60 bytes...
Find the similarity metric between two strings
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generate model using user:references vs user_id:integer
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Both will generate the same columns when you run the migration. In rails console, you can see...
Difference between rake db:migrate db:reset and db:schema:load
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db:migrate runs (single) migrations that have not run yet.
db:create creates the database
db...
How to kill zombie process
...e the zombie. (After the parent dies, the zombie will be inherited by pid 1, which will wait on it and clear its entry in the process table.) If your daemon is spawning children that become zombies, you have a bug. Your daemon should notice when its children die and wait on them to determine thei...