Stewart Gordon:
> Use an associative array for the translation table.
A new version of the code:
import std.stdio, std.string, std.range;
void main() {
char[] text = "dssdadsdasdas".dup; // lots of MBs of pure 7 bit ASCII text
dchar[dchar] aa = ['A':'5', 'a':'5', 'B':'7', 'b':'7', 'C':'6', 'c':'6',
'D':'3', 'd':'3', 'E':'0', 'e':'0', 'F':'4', 'f':'4', 'G':'9', 'g':'9',
'H':'9', 'h':'9', 'I':'6', 'i':'6', 'J':'1', 'j':'1', 'K':'7', 'k':'7',
'L':'8', 'l':'8', 'M':'5', 'm':'5', 'N':'1', 'n':'1', 'O':'8', 'o':'8',
'P':'8', 'p':'8', 'Q':'1', 'q':'1', 'R':'2', 'r':'2', 'S':'3', 's':'3',
'T':'4', 't':'4', 'U':'7', 'u':'7', 'V':'6', 'v':'6', 'W':'2', 'w':'2',
'X':'2', 'x':'2', 'Y':'3', 'y':'3', 'Z':'9', 'z':'9'];
auto text3 = text.translate(aa, "\"");
writeln(text3);
}
> Or write your own functions that work in the same way as maketrans/translate.
The code with the associative array is longer, and every char in the original
string requires one or two associative array lookups. This is quite inefficient
for ASCII strings.
Instead of writing my own string functions, or copying them from an older
Phobos, what about the idea of keeping both the old maketrans and translate
functions too and to un-deprecate them (maybe moving them in std.ascii)? They
are not UTF-safe, but I have large amounts of biological data text that is not
Unicode.
Bye,
bearophile
