From 1ce88da600a5a209d78e6a4fe2741357f6910d96 Mon Sep 17 00:00:00 2001
From: Simon Lydell <simon.lydell@gmail.com>
Date: Mon, 30 Oct 2023 07:58:35 +0100
Subject: [PATCH] Enable noUncheckedIndexedAccess in tsconfig.json

---
 index.ts      | 13 ++++---------
 tsconfig.json |  1 +
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/index.ts b/index.ts
index 6f86ce5..638958c 100644
--- a/index.ts
+++ b/index.ts
@@ -312,15 +312,13 @@ export function fieldsAuto<Mapping extends FieldsMapping>(
         return objectResult;
       }
       const object = objectResult.value;
-      const keys = Object.keys(mapping);
       const knownFields = new Set<string>();
       const result: Record<string, unknown> = {};
 
-      for (const key of keys) {
+      for (const [key, fieldOrCodec] of Object.entries(mapping)) {
         if (key === "__proto__") {
           continue;
         }
-        const fieldOrCodec = mapping[key];
         const field_: Field<any, any, FieldMeta> =
           "codec" in fieldOrCodec ? fieldOrCodec : { codec: fieldOrCodec };
         const {
@@ -383,11 +381,10 @@ export function fieldsAuto<Mapping extends FieldsMapping>(
     },
     encoder: (object) => {
       const result: Record<string, unknown> = {};
-      for (const key of Object.keys(mapping)) {
+      for (const [key, fieldOrCodec] of Object.entries(mapping)) {
         if (key === "__proto__") {
           continue;
         }
-        const fieldOrCodec = mapping[key];
         const field_: Field<any, any, FieldMeta> =
           "codec" in fieldOrCodec ? fieldOrCodec : { codec: fieldOrCodec };
         const {
@@ -658,8 +655,7 @@ export function tuple<const Codecs extends ReadonlyArray<Codec<any>>>(
         };
       }
       const result = [];
-      for (let index = 0; index < arr.length; index++) {
-        const codec = codecs[index];
+      for (const [index, codec] of codecs.entries()) {
         const decoderResult = codec.decoder(arr[index]);
         switch (decoderResult.tag) {
           case "DecoderError":
@@ -679,8 +675,7 @@ export function tuple<const Codecs extends ReadonlyArray<Codec<any>>>(
     },
     encoder: (value) => {
       const result = [];
-      for (let index = 0; index < codecs.length; index++) {
-        const codec = codecs[index];
+      for (const [index, codec] of codecs.entries()) {
         result.push(codec.encoder(value[index]));
       }
       return result as InferEncodedTuple<Codecs>;
diff --git a/tsconfig.json b/tsconfig.json
index ab33037..ef27776 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,6 +8,7 @@
     "noFallthroughCasesInSwitch": true,
     "noImplicitOverride": true,
     "noImplicitReturns": true,
+    "noUncheckedIndexedAccess": true,
     "skipLibCheck": true,
     "strict": true,
     "exactOptionalPropertyTypes": true,