8 files changed, 29 insertions, 28 deletions
diff --git a/aoc-2020-gleam/src/util/cache.gleam b/aoc-2020-gleam/src/util/cache.gleam
index e1eefd2..c007d35 100644
--- a/aoc-2020-gleam/src/util/cache.gleam
+++ b/aoc-2020-gleam/src/util/cache.gleam
@@ -1,6 +1,6 @@
-import gleam/map.{Map}
-import gleam/otp/actor.{Continue, Next, Stop}
-import gleam/erlang/process.{Normal, Subject}
+import gleam/dict.{type Dict}
+import gleam/otp/actor.{type Next, Stop}
+import gleam/erlang/process.{type Subject, Normal}
 
 const timeout = 1000
 
@@ -13,14 +13,18 @@ type Message(k, v) {
 type Server(k, v) =
   Subject(Message(k, v))
 
-fn handle_message(message: Message(k, v), dict: Map(k, v)) -> Next(Map(k, v)) {
+fn handle_message(
+  message: Message(k, v),
+  map: Dict(k, v),
+) -> Next(Message(k, v), Dict(k, v)) {
   case message {
     Shutdown -> Stop(Normal)
     Get(key, client) -> {
-      process.send(client, map.get(dict, key))
-      Continue(dict)
+      process.send(client, dict.get(map, key))
+
+      actor.continue(map)
     }
-    Set(key, value) -> Continue(map.insert(dict, key, value))
+    Set(key, value) -> actor.continue(dict.insert(map, key, value))
   }
 }
 
@@ -29,7 +33,7 @@ pub opaque type Cache(k, v) {
 }
 
 pub fn create(apply fun: fn(Cache(k, v)) -> t) -> t {
-  let assert Ok(server) = actor.start(map.new(), handle_message)
+  let assert Ok(server) = actor.start(dict.new(), handle_message)
   let result = fun(Cache(server))
   process.send(server, Shutdown)
   result
diff --git a/aoc-2020-gleam/src/util/dir.gleam b/aoc-2020-gleam/src/util/dir.gleam
index 194d712..d445d86 100644
--- a/aoc-2020-gleam/src/util/dir.gleam
+++ b/aoc-2020-gleam/src/util/dir.gleam
@@ -2,7 +2,7 @@ import gleam/int
 import gleam/iterator as iter
 import ext/resultx as resx
 import ext/iteratorx as iterx
-import util/pos2.{Pos2}
+import util/pos2.{type Pos2}
 
 pub type Dir {
   North
diff --git a/aoc-2020-gleam/src/util/graph.gleam b/aoc-2020-gleam/src/util/graph.gleam
index d9aa5aa..5d02fff 100644
--- a/aoc-2020-gleam/src/util/graph.gleam
+++ b/aoc-2020-gleam/src/util/graph.gleam
@@ -1,6 +1,6 @@
 import gleam/list
-import gleam/iterator.{Iterator} as iter
-import gleam/set.{Set}
+import gleam/iterator.{type Iterator} as iter
+import gleam/set.{type Set}
 
 fn dfs_helper(
   neighbours: fn(a) -> Iterator(a),
@@ -14,7 +14,7 @@ fn dfs_helper(
         neighbours,
         stack: node
         |> neighbours
-        |> iter.filter(for: fn(n) { !set.contains(visited, n) })
+        |> iter.filter(keeping: fn(n) { !set.contains(visited, n) })
         |> iter.to_list
         |> list.append(stack),
         visited: visited
@@ -26,10 +26,7 @@ fn dfs_helper(
 }
 
 pub fn dfs(from start: a, with neighbours: fn(a) -> Iterator(a)) -> Iterator(a) {
-  iter.from_list(dfs_helper(
-    neighbours,
-    stack: [start],
-    visited: set.new(),
-    acc: [],
-  ))
+  iter.from_list(
+    dfs_helper(neighbours, stack: [start], visited: set.new(), acc: []),
+  )
 }
diff --git a/aoc-2020-gleam/src/util/input_util.gleam b/aoc-2020-gleam/src/util/input_util.gleam
index 27f3009..f4f6812 100644
--- a/aoc-2020-gleam/src/util/input_util.gleam
+++ b/aoc-2020-gleam/src/util/input_util.gleam
@@ -3,7 +3,7 @@ import gleam/list
 import gleam/bool
 import gleam/string as str
 import gleam/function as fun
-import gleam/erlang/file
+import simplifile as file
 import ext/resultx as resx
 
 pub fn read_text(filename: String) -> String {
@@ -17,7 +17,7 @@ pub fn read_lines(filename: String) -> List(String) {
   |> read_text
   |> str.split(on: "\n")
   |> list.map(with: str.trim)
-  |> list.filter(for: fun.compose(str.is_empty, bool.negate))
+  |> list.filter(keeping: fun.compose(str.is_empty, bool.negate))
 }
 
 pub fn read_numbers(filename: String) -> List(Int) {
diff --git a/aoc-2020-gleam/src/util/parser.gleam b/aoc-2020-gleam/src/util/parser.gleam
index 1d4bba9..3b2e20e 100644
--- a/aoc-2020-gleam/src/util/parser.gleam
+++ b/aoc-2020-gleam/src/util/parser.gleam
@@ -5,7 +5,7 @@ import gleam/bool
 import gleam/string as str
 import gleam/result as res
 import gleam/function as fun
-import gleam/option.{None, Option, Some} as opt
+import gleam/option.{None, type Option, Some}
 
 // Heavily inspired by https://fsharpforfunandprofit.com/posts/understanding-parser-combinators/
 
@@ -188,19 +188,19 @@ pub fn then_3rd(two: Parser(#(a, b)), third: Parser(c)) -> Parser(#(a, b, c)) {
   })
 }
 
-pub fn or(first: Parser(a), else second: Parser(a)) -> Parser(a) {
+pub fn or(first: Parser(a), otherwise second: Parser(a)) -> Parser(a) {
   create(fn(input) {
     first
     |> run(on: input)
     |> res.or(run(second, on: input))
   })
-  |> labeled(with: first.label <> " |> or(else: " <> second.label <> ")")
+  |> labeled(with: first.label <> " |> or(otherwise: " <> second.label <> ")")
 }
 
 pub fn opt(parser: Parser(a)) -> Parser(Option(a)) {
   parser
   |> map(with: Some)
-  |> or(else: succeeding(with: None))
+  |> or(otherwise: succeeding(with: None))
   |> labeled(with: "opt(" <> parser.label <> ")")
 }
 
@@ -340,7 +340,7 @@ pub fn sep1(parser: Parser(a), by separator: Parser(b)) -> Parser(List(a)) {
 pub fn sep0(parser: Parser(a), by separator: Parser(b)) -> Parser(List(a)) {
   parser
   |> sep1(by: separator)
-  |> or(else: succeeding(with: []))
+  |> or(otherwise: succeeding(with: []))
   |> labeled(
     with: "sep0(" <> parser.label <> ", by: " <> separator.label <> ")",
   )
diff --git a/aoc-2020-gleam/src/util/pos2.gleam b/aoc-2020-gleam/src/util/pos2.gleam
index 4de2ab9..0b6256c 100644
--- a/aoc-2020-gleam/src/util/pos2.gleam
+++ b/aoc-2020-gleam/src/util/pos2.gleam
@@ -1,7 +1,7 @@
 import gleam/int
 import gleam/bool
 import gleam/list
-import gleam/set.{Set}
+import gleam/set.{type Set}
 
 pub type Pos2 =
   #(Int, Int)
diff --git a/aoc-2020-gleam/src/util/pos3.gleam b/aoc-2020-gleam/src/util/pos3.gleam
index 5525607..3787c19 100644
--- a/aoc-2020-gleam/src/util/pos3.gleam
+++ b/aoc-2020-gleam/src/util/pos3.gleam
@@ -1,6 +1,6 @@
 import gleam/list
 import gleam/bool
-import gleam/set.{Set}
+import gleam/set.{type Set}
 
 pub type Pos3 =
   #(Int, Int, Int)
diff --git a/aoc-2020-gleam/src/util/pos4.gleam b/aoc-2020-gleam/src/util/pos4.gleam
index 3eda4c5..a96bcca 100644
--- a/aoc-2020-gleam/src/util/pos4.gleam
+++ b/aoc-2020-gleam/src/util/pos4.gleam
@@ -1,6 +1,6 @@
 import gleam/list
 import gleam/bool
-import gleam/set.{Set}
+import gleam/set.{type Set}
 
 pub type Pos4 =
   #(Int, Int, Int, Int)