Anonymous user
Non-decimal radices/Convert: Difference between revisions
Added alternative, non-built-in code that works with arbitrary length, base data
(Added alternative, non-built-in code that works with arbitrary length, base data) |
|||
Line 1,283:
//optional special case for hex:
i = +('0x'+s) //hexadecimal base 16, if s='1a' then i=26.</lang>
Arbitrary base, length base conversion (note: only works with arrays of numbers; requires converting to/from base character)
<lang javascript>
function conv(farray, fbase, tbase)
{ // Takes a fbase chunk(s) until we have a tbase chunk, then removes tbase chunk(s) while possible, repeats for entire value
var res = [], accum = 0, rem = 0, pos, val, a, b, res;
for(a = 0, pos = farray.length - 1; a < farray.length; a++, pos--) // base x -> base 10
if(farray[a] > 0 && farray[a] < fbase) accum += farray[a] * Math.pow(fbase, pos);
for(a = 1, val = Math.pow(tbase, pos); val <= accum; a++)
val = Math.pow(tbase, a); // Find max value that fits
for(a--; a >= 0; a--)
{
val = Math.pow(tbase, a);
res[a] = Math.floor(accum / val);
accum %= val;
}
return res.reverse();
}</lang>
=={{header|jq}}==
| |||