Education Ecosystem Blog

 
Whenever you think of the best way to do something, there are different opinions on the subject.  Best in what terms? Security, speed, flexibility, code simplicity, and so on. We hope you will contribute with suggestions in the comments area below.

To create a random string in Ruby, we will show in this article the SecureRandom module. For it to work properly, the random number generator should be available, if not, this error will happen: NotImplementedError.
 

Ruby – Creating a random String base64 (a)

require 'SecureRandom'
SecureRandom.base64
"/2BuBuLf3WfSKyQbRcc/A=="

It generates a string base64. The argument “a” determines the length of the random String created. The length of the String created will be about 4/3 of the value of “a” declared. If “a” is not stated, the number 16 is used as default. The resulting string can contain characters A-Z, a-z, 0-9, ” “, “/” and “=”.
 

Ruby – Creating a random String hex (a)

SecureRandom.hex
"Eb693ec8252cd630102fd0d0fb7c3485"
SecureRandom.hex (7)
"91dc3bfb4de5b1"

It generates a string hexadecimal base. The argument “a” determines the length of the Random String created. The length of the String created will be twice the value of “a” declared. If “a” is not stated, the number 16 is used as default. The resulting String may contain the characters 0-9 and a-f.
 

Ruby – Creating a random binary string using _bytes (a)

SecureRandom.random_bytes
" XD8 xE0   XF4  r  X b2  XFC * WM  xFF  x83  x18  xF45  XB6"

It generates a random binary string. The argument “a” determines the length of the random String that will be created. If “a” is not stated, the number 16 is used. The result can contain any byte between “x00” – “xff”.

If you want to explore other questions, you can check our collection of educational videos about Ruby. Below are some examples:

• Building a Rails app for managing students

• API Iron Yard work

You can also subscribe to some channels that broadcasts in Ruby, such as the following:

julemagne

dogweather

Another cool way to find out interesting things about Ruby is to access our project page!