✨ Add HashMap.some with tests

Effect-TS · Jan 27, 2025 · 6b9ce25 · 6b9ce25
1 parent 2358caf
commit 6b9ce25
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diff --git a/packages/effect/src/HashMap.ts b/packages/effect/src/HashMap.ts
@@ -442,3 +442,17 @@ export const findFirst: {
   <K, A, B extends A>(self: HashMap<K, A>, predicate: (a: A, k: K) => a is B): Option<[K, B]>
   <K, A>(self: HashMap<K, A>, predicate: (a: A, k: K) => boolean): Option<[K, A]>
 } = HM.findFirst
+
+/**
+ * Checks if any entry in a hashmap meets a specific condition.
+ *
+ * @param self - The hashmap to check.
+ * @param predicate - The condition to test entries (value, key).
+ *
+ * @since 3.13.0
+ * @category elements
+ */
+export const some: {
+  <K, A>(predicate: (a: NoInfer<A>, k: K) => boolean): (self: HashMap<K, A>) => boolean
+  <K, A>(self: HashMap<K, A>, predicate: (a: A, k: K) => boolean): boolean
+} = HM.some
diff --git a/packages/effect/src/internal/hashMap.ts b/packages/effect/src/internal/hashMap.ts
@@ -539,3 +539,19 @@ export const findFirst: {
     return Option.none()
   }
 )
+
+/** @internal */
+export const some: {
+  <K, A>(predicate: (a: NoInfer<A>, k: K) => boolean): (self: HM.HashMap<K, A>) => boolean
+  <K, A>(self: HM.HashMap<K, A>, predicate: (a: A, k: K) => boolean): boolean
+} = Dual.dual(
+  2,
+  <K, A>(self: HM.HashMap<K, A>, predicate: (a: A, k: K) => boolean): boolean => {
+    for (const ka of self) {
+      if (predicate(ka[1], ka[0])) {
+        return true
+      }
+    }
+    return false
+  }
+)
diff --git a/packages/effect/test/HashMap.test.ts b/packages/effect/test/HashMap.test.ts
@@ -284,6 +284,19 @@ describe("HashMap", () => {
     deepStrictEqual(HM.get(key(2))(result), Option.none())
   })
 
+  it("some", () => {
+    const mapWith3LettersMax = HM.make([0, "a"], [1, "bb"], [3, "ccc"])
+
+    deepStrictEqual(HM.some(mapWith3LettersMax, (value) => value.length > 3), false)
+    deepStrictEqual(pipe(mapWith3LettersMax, HM.some((value) => value.length > 3)), false)
+
+    deepStrictEqual(HM.some(mapWith3LettersMax, (value) => value.length > 1), true)
+
+    deepStrictEqual(HM.some(mapWith3LettersMax, (value, key) => value.length > 1 && key === 0), false)
+
+    deepStrictEqual(HM.some(mapWith3LettersMax, (value, key) => value.length > 1 && key === 1), true)
+  })
+
   it("reduce", () => {
     const map1 = HM.make([key(0), value("a")], [key(1), value("b")])
     const result1 = pipe(map1, HM.reduce("", (acc, { s }) => acc.length > 0 ? `${acc},${s}` : s))