Kata

Summary: In this kata we want to help an alien retailer.

Scenario: You work for the IRS and have been sent the 1040 form for a local retailer. In your spare time you discover the retailer is native to Beta Centauri and have a base 62 numbering system - which explains the problems you were having correcting his Adjusted Gross Income (AGI).

Task: Generate a convertBase62ToDecimal method that converts a base-62 value into its decimal equivalent.

Scope:

• Presume all digits, upper-case, and lower-case letters are valid.
• Digits are 0-9, then A-Z, then a-z

Examples:

• A (base 62) = 10 (base 10)
• a (base 62) = 36 (base 10)
• 1c (base 62) = 100 (base 10)
• 100 (base 62) = 3844 (base 10)

Note: Input can be either a string or a number.