feat(Buffer): add static from method

slikts · Jan 24, 2023 · 6b281bb · 6b281bb
1 parent 86a8b51
commit 6b281bb
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diff --git a/src/Buffer.spec.ts b/src/Buffer.spec.ts
@@ -73,4 +73,9 @@ describe('Buffer', () => {
     expect(it[Symbol.iterator]()).toBe(it[Symbol.iterator]());
     expect([...q]).toEqual([1, 2]);
   });
+
+  it('constructs from an iterable', () => {
+    const q = Buffer.from([1, 2, 3], 2);
+    expect([...q]).toEqual([2, 3]);
+  });
 });
diff --git a/src/Buffer.ts b/src/Buffer.ts
@@ -65,4 +65,12 @@ export default class Buffer<A> {
       },
     };
   }
+
+  static from<A>(iterable: Iterable<A>, limit: number) {
+    const buffer = new Buffer<A>(limit);
+    for (const value of iterable) {
+      buffer.enqueue(value);
+    }
+    return buffer;
+  }
 }