From c6723868d9469f32bfeb209c9e93b8cf4db90971 Mon Sep 17 00:00:00 2001
From: Yanick Champoux <yanick@babyl.ca>
Date: Tue, 27 Feb 2024 09:13:01 -0500
Subject: [PATCH 1/2] add mapIf and mapIfElse

---
 docs/latest/api.md | 21 ++++++++++++++++-----
 src/mapIf.test.ts  | 23 +++++++++++++++++++++++
 src/mapIf.ts       | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 75 insertions(+), 5 deletions(-)
 create mode 100644 src/mapIf.test.ts
 create mode 100644 src/mapIf.ts

diff --git a/docs/latest/api.md b/docs/latest/api.md
index 2a8d261..21614b5 100644
--- a/docs/latest/api.md
+++ b/docs/latest/api.md
@@ -1,5 +1,4 @@
-
-# API 
+# API
 
 <div class="info">
 <h4>💡 Info</h4>
@@ -13,7 +12,7 @@ All functions are curried, Remeda-style, so if you see `f(dataIn, ...others)`, i
 `updeep-remeda` exports a default function that is an alias to `u.update` and
 has all the other functions available as props.
 
-``` 
+```
 import u from '@yanick/updeep-remeda';
 
 const foo = u({a:1}, { a: x => x + 1 });
@@ -23,12 +22,12 @@ const bar = u.updateIn({ a: { b: 2 } }, 'a.b', 3 );
 
 Or you can import the functions piecemeal:
 
-``` 
+```
 import { updateIn, omit } from '@yanick/updeep-remeda';
 ```
 
-
 ## `u(dataIn, updates)`
+
 ## `u.update(dataIn, updates)`
 
 Update as many values as you want, as deeply as you want. The `updates` parameter can either be an object, a function, or a value. Everything returned from `u` is frozen recursively.
@@ -294,6 +293,18 @@ Essentially the same as their Remeda counterparts. The difference being
 that if the transformation results in no change, the original object/array is
 returned.
 
+## `u.map(objectIn, updates)`
+
+Applies the updates on all entries of `objectIn`.
+
+## `u.mapIf(objectIn, predicate, updates)`
+
+Shorthand for `u.map( objectIn, u.if(predicate,updates) )`.
+
+## `u.mapIfElse(objectIn, predicate, updates, updatesElse)`
+
+Shorthand for `u.map( objectIn, u.ifElse(predicate,updates,updatesElse) )`.
+
 ## `u.matches(dataIn, condition)`
 
 Do a deep comparison with `condition`, and returns
diff --git a/src/mapIf.test.ts b/src/mapIf.test.ts
new file mode 100644
index 0000000..c0a68eb
--- /dev/null
+++ b/src/mapIf.test.ts
@@ -0,0 +1,23 @@
+import { expect, test, describe } from "vitest";
+
+import mapIf, { mapIfElse } from "./mapIf.js";
+
+test("does updates with the if and else", () => {
+  const object = [
+    { x: 1, y: 0 },
+    { x: 2, y: 0 },
+    { x: 3, y: 0 },
+  ];
+
+  expect(mapIfElse(object, { x: 2 }, { y: 2 }, { y: 3 })).toEqual([
+    { x: 1, y: 3 },
+    { x: 2, y: 2 },
+    { x: 3, y: 3 },
+  ]);
+
+  expect(mapIf(object, { x: 2 }, { y: 2 })).toEqual([
+    { x: 1, y: 0 },
+    { x: 2, y: 2 },
+    { x: 3, y: 0 },
+  ]);
+});
diff --git a/src/mapIf.ts b/src/mapIf.ts
new file mode 100644
index 0000000..0ff4df4
--- /dev/null
+++ b/src/mapIf.ts
@@ -0,0 +1,36 @@
+import wrap from "./wrap.js";
+import matches from "./matches.js";
+import map from "./map.js";
+import ifElse from "./ifElse.js";
+
+function _mapIfElse(object, predicate, trueUpdates, falseUpdates) {
+  const test =
+    typeof predicate === "function"
+      ? predicate
+      : typeof predicate === "object"
+      ? matches(predicate)
+      : predicate;
+
+  const updates = test ? trueUpdates : falseUpdates;
+
+  return map(object, ifElse(test, trueUpdates, falseUpdates));
+}
+
+function mapIf(object, predicate, trueUpdates) {
+  return _mapIfElse(object, predicate, trueUpdates, (x) => x);
+}
+
+type Predicate = ((source: any) => boolean) | boolean | Record<string, any>;
+
+export interface MapIfElse {
+  (object, predicate: Predicate, trueUpdates, falseUpdates): unknown;
+  (predicate: Predicate, trueUpdates, falseUpdates): (unknown) => unknown;
+}
+
+export interface MapIf {
+  (object, predicate: Predicate, trueUpdates): unknown;
+  (predicate: Predicate, trueUpdates): (unknown) => unknown;
+}
+
+export default wrap(mapIf) as MapIf;
+export const mapIfElse = _mapIfElse as any as MapIfElse;

From 190bb7b80ab39c2d4976782b1619e079d705128a Mon Sep 17 00:00:00 2001
From: Yanick Champoux <yanick@babyl.ca>
Date: Tue, 27 Feb 2024 12:10:40 -0500
Subject: [PATCH 2/2] changelog

---
 .../2024-02-27T12:09:48-paradoxically-precepts-baseball.md   | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/2024-02-27T12:09:48-paradoxically-precepts-baseball.md

diff --git a/.changeset/2024-02-27T12:09:48-paradoxically-precepts-baseball.md b/.changeset/2024-02-27T12:09:48-paradoxically-precepts-baseball.md
new file mode 100644
index 0000000..e575984
--- /dev/null
+++ b/.changeset/2024-02-27T12:09:48-paradoxically-precepts-baseball.md
@@ -0,0 +1,5 @@
+---
+"@yanick/updeep-remeda": minor
+---
+
+add functions mapIf and mapIfElse