Hi, I'm just beginning julia, and have written nearly 100 lines of code!
Let the stupid question begin:
I thought I'd try to implement the equivalent of Perl's tr/// function (or
sed's y///) to operate on ASCIIStrings, and I thought an efficient way to
code it would be to create a look up table, a 256 element array of UInt8
containing replacement values for each ASCII character, and iterate through
the string. It all works fine when I have UInt8[], and I can construct
them using b"" literal strings:
# Perl: "hello" =~ tr/ho/bs/
str = b"hello"
src = b"ho"
rpl = b"bs"
lut = collect(0x00:0xff)
for i = 1:length(src)
lut[ src[i] + 1 ] = rpl[i]
end
@show str;
for (i,c) in enumerate(str)
str[i] = lut[c + 1]
end
@show str;
but I can't work out how to convert from an ASCIIString (which doesn't
allow indexing with UInt8) to Array{UInt8,1} (which doesn't allow indexing
with Char) and visa versa.
