#Introduction

#Challenge

#Examples

Introduction

Challenge

Examples

• The number to be converted will be a non-negative integer (since - and . may be in the character set). So too will be the output.
• Leading zeroes (the first character in the character set) should be trimmed.
• The minimum supported base range is from 2 to 95, consisting of the printable ascii characters.
• The input for the number to be converted, the character set, and the output must all be of the string datatype. The bases must be of the base-10 integer datatype (or integer floats).
• The length of the input number string can be very large. It's hard to quantify a sensible minimum, but expect it to be able to handle at least 1000 characters, and complete 100 characters input in less than 10 seconds on a decent machine (very generous for this sort of problem, but I don't want speed to be the focus).
• You cannot use built in change-of-base functions.
• The character set input can be in any arrangement, not just the typical 0-9a-z...etc.
• Assume that only valid input will be used. Don't worry about error handling.

• The number to be converted will be a non-negative integer (since - and . may be in the character set). So too will be the output.
• Leading zeroes (the first character in the character set) should be trimmed. If the result is zero, a single zero digit should remain.
• The minimum supported base range is from 2 to 95, consisting of the printable ascii characters.
• The input for the number to be converted, the character set, and the output must all be of the string datatype. The bases must be of the base-10 integer datatype (or integer floats).
• The length of the input number string can be very large. It's hard to quantify a sensible minimum, but expect it to be able to handle at least 1000 characters, and complete 100 characters input in less than 10 seconds on a decent machine (very generous for this sort of problem, but I don't want speed to be the focus).
• You cannot use built in change-of-base functions.
• The character set input can be in any arrangement, not just the typical 0-9a-z...etc.
• Assume that only valid input will be used. Don't worry about error handling.

Write a program or function in the language of your choice that can convert a string of one base to a string of another base. Input should be the number to be converted (string), from-base (base-10 integer), to-base (base-10 integer), and the character set (string). Output should be the converted number (string).

Write a program or function in the language of your choice that can convert a string of one base to a string of another base. Input should be the number to be converted (string), from-base (base-10 number), to-base (base-10 number), and the character set (string). Output should be the converted number (string).