Base62

The Base62 is an encoding scheme that use 62 characters, consists in capital letters A to Z, the lower case letters and the numbers 0 to 9

Characters: 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz

Why is useful?

Is useful when you need to convert a number to a short string characters, is used commonly for URL shorteners like tinyurl

Example the number 11157 is converted to "2TX"

Methods

• encode: Encode a number to a string representation
• decode: Decode the string to retrieve the number

Algorithm

11157 = 2 x 62² + 55 x 62¹ + 59 x 62⁰ = [2, 55, 59] -> Use the alphabet to retrieve the char asociated -> [2, T, X]