How to change bases?

[Albert Chan]

(04-10-2019 12:46 AM)toml_12953 Wrote:  To convert 45 base 8 to base 16 you could nest converts like this:

convert(convert([5 4],base,8),base,16)

which would put out [5 2] since 25 is the hex equivalent of 45 octal

I can not get used to digits in reversed order, so I flip it:

btb(lst, b1, b2) := reverse(convert(polyEval(lst, b1), base, b2))

btb([4,5], 8, 16) → [2,5], or 0x25

Example, decimal 123 to base 2

btb([1,2,3], 10, 2) or btb([123], 10, 2] → [1,1,1,1,0,1,1], or 0b1111011