Re: Print int[string] sorted by Value
On 10/28/20 9:30 AM, Paul wrote: > On Wednesday, 28 October 2020 at 15:40:23 UTC, aberba wrote: >> Have you tries .values() function? dictionary.values.sort() > > Thanks aberba. Yes, that was my first attempt! > > If my terminology is correct that gives me a "range" of sorted VALUES. No, both .values and .keys return dynamic arrays that are freshly populated. .byKey, .byValue, and .byKeyValue are "ranges" that iterate the elements lazily. Ali
Re: Print int[string] sorted by Value
On Wednesday, 28 October 2020 at 15:27:04 UTC, H. S. Teoh wrote:
foreach (key; aa.keys.sort!((a,b) => aa[a] < aa[b])) {
writeln(key);
This solution worked perfectly without modifying any of my other
code. I don't fully understand it but can study up on the syntax.
Re: Print int[string] sorted by Value
On Wednesday, 28 October 2020 at 15:40:23 UTC, aberba wrote: Have you tries .values() function? dictionary.values.sort() Thanks aberba. Yes, that was my first attempt! If my terminology is correct that gives me a "range" of sorted VALUES. I think I can't "iterate"(foreach) through an array of VALUE[KEY] using the VALUE. I can only iterate over the KEYS...maybe? If my array is of type int[string] I can do: foreach(word-STRING, range-of-STRINGS) writeln(dictionary[word-STRING]); but not: foreach(value-INT, range-of-VALUES) writeln(dictionary[value-INT]<- wrong type);
Re: Print int[string] sorted by Value
On Wednesday, 28 October 2020 at 15:25:26 UTC, Paul Backus wrote:
auto sorted = dictionary.byPair.array.sort!((a, b) => a.value <
b.value)
It seems this method produces a ?sorted array of tuples?
[..Tuple!(string, "key", uint, "value")("Program", 74),
Tuple!(string, "key", uint, "value")("rd", 74)..]
I guess I would just have to iterate through the tuples.
Re: Print int[string] sorted by Value
On Wednesday, 28 October 2020 at 15:15:40 UTC, Paul wrote: per the D sample wc2.d size_t[string] dictionary; <-is printed by... . foreach (word1; dictionary.keys.sort) writef etc I want to print the dictionary sorted by value not key. I can write an algorithm but is there a library method(s) I can use to iterate through the array sorted by decreasing values? Thanks for your time. Have you tries .values() function? dictionary.values.sort()
Re: Print int[string] sorted by Value
Thanks Teoh
Re: Print int[string] sorted by Value
On Wednesday, 28 October 2020 at 15:25:26 UTC, Paul Backus wrote: On Wednesday, 28 October 2020 at 15:15:40 UTC, Paul wrote: per the D sample wc2.d size_t[string] dictionary; <-is printed by... . foreach (word1; dictionary.keys.sort) writef etc I want to print the dictionary sorted by value not key. I can write an algorithm but is there a library method(s) I can use to iterate through the array sorted by decreasing values? Thanks for your time. import std.array, std.algorithm; auto sorted = dictionary.byPair.array.sort!((a, b) => a.value < b.value) Thanks Paul
Re: Print int[string] sorted by Value
On Wednesday, 28 October 2020 at 15:15:40 UTC, Paul wrote: per the D sample wc2.d size_t[string] dictionary; <-is printed by... . foreach (word1; dictionary.keys.sort) writef etc I want to print the dictionary sorted by value not key. I can write an algorithm but is there a library method(s) I can use to iterate through the array sorted by decreasing values? Thanks for your time. import std.array, std.algorithm; auto sorted = dictionary.byPair.array.sort!((a, b) => a.value < b.value)
Re: Print int[string] sorted by Value
On Wed, Oct 28, 2020 at 03:15:40PM +, Paul via Digitalmars-d-learn wrote:
> per the D sample wc2.d
> size_t[string] dictionary; <-is printed by...
> .
> foreach (word1; dictionary.keys.sort) writef etc
>
> I want to print the dictionary sorted by value not key. I can write
> an algorithm but is there a library method(s) I can use to iterate
> through the array sorted by decreasing values?
[...]
Just use a different sorting predicate:
import std;
void main() {
int[string] aa = [
"abc": 321,
"def": 234,
"ghi": 524,
"jkl": 310,
"mno": 110,
"pqr": 910,
];
foreach (key; aa.keys.sort!((a,b) => aa[a] < aa[b])) {
writeln(key);
}
}
T
--
Curiosity kills the cat. Moral: don't be the cat.
