feat: ✨ 添加toOption操作符

src/operator/index.test.ts

@@ -1,5 +1,5 @@
 import { of, throwError } from "rxjs";
-import { pickData, toDesc, toPage, toVirtualPage } from "./index";
+import { pickData, toDesc, toOption, toPage, toVirtualPage } from "./index";
 
 describe("pickData", function () {
   it("should be right", function () {
@@ -65,3 +65,17 @@ describe("toVirtualPage", function () {
       });
   });
 });
+
+describe("toOption", function () {
+  it("should be right", function () {
+    const strings = ["a", "b"];
+    of(strings)
+      .pipe(toOption())
+      .subscribe((x) => {
+        expect(x).toStrictEqual([
+          { value: "a", label: "a" },
+          { value: "b", label: "b" },
+        ]);
+      });
+  });
+});

src/operator/index.ts

@@ -1,4 +1,4 @@
-import { catchError, map, of, pipe } from "rxjs";
+import { catchError, from, map, mergeMap, of, pipe, toArray } from "rxjs";
 
 type Page<T = any> = {
   list: T[];
@@ -36,3 +36,12 @@ export function toVirtualPage<T = any>() {
     catchError(() => of({ data: [], success: true, total: 0 }))
   );
 }
+
+export function toOption() {
+  return pipe(
+    mergeMap((x: string[]) => from(x).pipe(map(string2Option), toArray()))
+  );
+  function string2Option(x: string) {
+    return { value: x, label: x };
+  }
+}