[ 源代码： ruby-base62 ]
软件包：ruby-base62（1.0.0-3）
base62 encoding and decoding library for Ruby
Base62 monkeypatches Integer to add an Integer#base62_encode instance method to encode an integer in the character set of 0-9 A-Z a-z. It also monkeypatches String to add String#base62_decode to take the string and turn it back into a valid integer.