On Monday, 6 February 2017 at 17:35:02 UTC, Jonathan M Davis
wrote:
You have to import std.range to use groupBy.
Of course, "import std.range" already done.
I tested it also with full rosetta's code:
import std.stdio, std.string, std.algorithm, std.array, std.conv,
std.ascii, std.range;
string[] naturalSort(string[] arr) /*pure @safe*/ {
static struct Part {
string s;
int opCmp(in ref Part other) const pure {
return (s[0].isDigit && other.s[0].isDigit) ?
cmp([s.to!ulong], [other.s.to!ulong]) :
cmp(s, other.s);
}
}
static mapper(in string txt) /*pure nothrow @safe*/ {
auto r = txt
.strip
.tr(whitespace, " ", "s")
.toLower
.groupBy!isDigit
.map!(p => Part(p.text))
.array;
return (r.length > 1 && r[0].s == "the") ? r.dropOne : r;
}
return arr.schwartzSort!mapper.release;
}
void main() /*@safe*/ {
auto tests = [
// Ignoring leading spaces.
["ignore leading spaces: 2-2", " ignore leading spaces: 2-1",
"
ignore leading spaces: 2+1", " ignore leading spaces: 2+0"],
// Ignoring multiple adjacent spaces (m.a.s).
["ignore m.a.s spaces: 2-2", "ignore m.a.s spaces: 2-1",
"ignore m.a.s spaces: 2+0", "ignore m.a.s spaces: 2+1"],
// Equivalent whitespace characters.
["Equiv. spaces: 3-3", "Equiv.\rspaces: 3-2",
"Equiv.\x0cspaces: 3-1", "Equiv.\x0bspaces: 3+0",
"Equiv.\nspaces: 3+1", "Equiv.\tspaces: 3+2"],
// Case Indepenent sort.
["cASE INDEPENENT: 3-2", "caSE INDEPENENT: 3-1",
"casE INDEPENENT: 3+0", "case INDEPENENT: 3+1"],
// Numeric fields as numerics.
["foo100bar99baz0.txt", "foo100bar10baz0.txt",
"foo1000bar99baz10.txt", "foo1000bar99baz9.txt"],
// Title sorts.
["The Wind in the Willows", "The 40th step more",
"The 39 steps", "Wanda"]];
foreach (test; tests)
writeln(test, "\n", test.naturalSort, "\n");
}
result:
$ dub
Performing "debug" build using dmd for x86_64.
sort_test ~master: building configuration "application"...
source/app.d(19,18): Error: no property 'groupBy' for type
'string'
dmd failed with exit code 1.
