Repeat a string: Difference between revisions
→{{header|AppleScript}}
No edit summary |
|||
Line 76:
set final_string to ""
repeat 5 times
end repeat</lang>
For larger numbers of repetitions, however, it proves significantly faster to progressively double a copy of the original string (concatenating it with itself). Intermediate stages of doubling are appended to an accumulator wherever required for binary composition of the target number.
See the technique of 'Egyptian Multiplication' described in the Rhind Mathematical Papyrus at the British Museum.
{{trans|JavaScript}}
<lang AppleScript>on run
nreps("ha", 50000)
end run
-- String -> Int -> String
on nreps(s, n)
set o to ""
if n < 1 then return o
repeat while (n > 1)
if (n mod 2) > 0 then set o to o & s
set n to (n div 2)
set s to (s & s)
end repeat
return o & s
end nreps
</lang>
=={{header|Applesoft BASIC}}==
| |||