itertools instead of bespoke

Cargo.lock

@@ -8,6 +8,21 @@ version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "080e9890a082662b09c1ad45f567faeeb47f22b5fb23895fbe1e651e718e25ca"
 
+[[package]]
+name = "either"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11157ac094ffbdde99aa67b23417ebdd801842852b500e395a45a9c0aac03e4a"
+
+[[package]]
+name = "itertools"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba291022dbbd398a455acf126c1e341954079855bc60dfdda641363bd6922569"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.10"
@@ -19,6 +34,7 @@ name = "lodestone-level-calc-rs"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "itertools",
  "serde",
  "serde_json",
 ]

Cargo.toml

@@ -7,5 +7,6 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.79"
+itertools = "0.12.1"
 serde = { version = "1.0.196", features = ["alloc", "serde_derive"] }
 serde_json = { version = "1.0.113", features = ["alloc"] }

src/main.rs

@@ -1,8 +1,7 @@
 mod compile_data;
-mod map_ok;
 mod raw_data;
 
-use map_ok::MapOkTrait;
+use itertools::Itertools;
 
 use crate::compile_data::{DpsRole, JobStats, Role};
 use crate::raw_data::RawJobStats;

src/map_ok.rs

@@ -1,33 +0,0 @@
-#[derive(Clone)]
-pub struct MapOkIterator<I, F> {
-    iter: I,
-    f: F,
-}
-
-impl<A, B, E, I, F> Iterator for MapOkIterator<I, F>
-where
-    F: FnMut(A) -> B,
-    I: Iterator<Item = Result<A, E>>,
-{
-    type Item = Result<B, E>;
-
-    #[inline]
-    fn next(&mut self) -> Option<Self::Item> {
-        self.iter.next().map(|x| x.map(&mut self.f))
-    }
-}
-
-pub trait MapOkTrait {
-    fn map_ok<F, A, B, E>(self, func: F) -> MapOkIterator<Self, F>
-    where
-        Self: Sized + Iterator<Item = Result<A, E>>,
-        F: FnMut(A) -> B,
-    {
-        MapOkIterator {
-            iter: self,
-            f: func,
-        }
-    }
-}
-
-impl<I, T, E> MapOkTrait for I where I: Sized + Iterator<Item = Result<T, E>> {}