On Tuesday, 21 April 2015 at 14:25:29 UTC, Steven Schveighoffer
wrote:
On 4/21/15 10:07 AM, Chris wrote:
Here's bearophile's version of sorting an AA by value [1]
void main() {
import std.stdio: writeln;
import std.algorithm.sorting: multiSort;
import std.array: array;
const size_t[string] wCount = [
"hamster": 5,
"zorro": 80,
"troll": 90,
"algorithm": 80,
"beer": 80
];
auto pairs = wCount.byKeyValue.array;
assert(wCount.length == pairs.length);
pairs.multiSort!(q{a.value > b.value}, q{a.key < b.key});
assert(pairs[2].key == "beer");
foreach (const ref it; pairs)
writeln(it.key, ": ", it.value);
}
Should we add it to the documentation of
1.
http://dlang.org/phobos/std_algorithm_sorting.html#.multiSort
2. http://dlang.org/hash-map.html
We should not be promoting string-based lambdas:
pairs.multiSort!((a, b) => a.value > b.value, (a, b) => a.key <
b.key);
I find the strings to be more readable, simply because they are
shorter. I would probably even prefer normal "" quotes.
Compare:
pairs.multiSort!((a, b) => a.value > b.value, (a, b) => a.key <
b.key);
pairs.multiSort!(q{a.value > b.value}, q{a.key < b.key});
pairs.multiSort!("a.value > b.value", "a.key < b.key");
I think this would be a perfect addition for the disqus forum
of that function (once ddox gets to be the default). I don't
want to get into adding sample usages for every use case on
every function to the documentation.
Not for every possible use case, but I'd prefer examples
demonstrating an actual, practical application to ones that were
just made up for the sake of documentation.
