Dmitry plus lesson 13 homework

src/lesson13/homework/immutability.test.ts

@@ -1,8 +1,12 @@
 test("dummy test", () => undefined);
 
-/*
-
-import { OriginalTeam, ExpectedTeam } from "./immutability";
+import {
+  OriginalTeam,
+  ExpectedTeam,
+  originalTeamToExpectedTeam,
+  originalArrayToExpectedArray,
+  originalTeamToExpectedTeam2,
+} from "./immutability";
 
 // Задание 1
 test("team to team", () => {
@@ -18,7 +22,7 @@ test("team to team", () => {
     roster: 25,
   };
 
-  expect(originalTeamToExpectedTeam(originalTeam)).toBe(expectedTeam);
+  expect(originalTeamToExpectedTeam(originalTeam)).toStrictEqual(expectedTeam);
 });
 
 // Задание 2
@@ -27,7 +31,9 @@ test("array to array", () => {
 
   const expectedArray = ["two", 3, 4, 5];
 
-  expect(originalArrayToExpectedArray(originalArray)).toBe(expectedArray);
+  expect(originalArrayToExpectedArray(originalArray)).toStrictEqual(
+    expectedArray
+  );
 });
 
 // Задание 3
@@ -48,7 +54,5 @@ test("team to team deep", () => {
     },
   };
 
-  expect(originalTeamToExpectedTeam(originalTeam)).toBe(expectedTeam);
+  expect(originalTeamToExpectedTeam2(originalTeam)).toStrictEqual(expectedTeam);
 });
-
-*/

src/lesson13/homework/immutability.ts

@@ -1,39 +1,68 @@
 // // Задание 1
-// export type OriginalTeam = {
-//   size: number;
-//   name: string;
-//   league: string;
-// };
-
-// export type ExpectedTeam = {
-//   name: string;
-//   league: string;
-//   roster: number;
-// };
-
-// export const originalTeamToExpectedTeam = (
-//   originalTeam: OriginalTeam
-// ): ExpectedTeam => {
-//   //
-// };
+export type OriginalTeam = {
+  size: number;
+  name: string;
+  league: string;
+};
+
+export type ExpectedTeam = {
+  name: string;
+  league: string;
+  roster: number;
+};
+
+export const originalTeamToExpectedTeam = (
+  originalTeam: OriginalTeam
+  // eslint-disable-next-line
+    // @ts-ignore
+): ExpectedTeam => {
+  const result: ExpectedTeam = {
+    name: "New York Badgers",
+    roster: 25,
+    league: originalTeam.league,
+  };
+
+  return result;
+};
 
 // // Задание 2
-// type SomeArray = Array<number | string>;
+type SomeArray = Array<number | string>;
+
+export const originalArrayToExpectedArray = (
+  originalArray: SomeArray
+  // eslint-disable-next-line
+    // @ts-ignore
+): SomeArray => {
+  const newLastItem: number | string = originalArray[originalArray.length - 1];
+
+  const result: SomeArray = originalArray.slice(-2);
 
-// const originalArrayToExpectedArray = (originalArray: SomeArray): SomeArray => {
-//   //
-// };
+  // eslint-disable-next-line @typescript-eslint/ban-ts-ignore
+  // @ts-ignore
+  result.push(newLastItem + 1);
+  result.unshift("two");
+
+  return result;
+};
 
 // // Задание 3
 
-// export type Team = {
-//   name: string;
-//   captain: {
-//     name: string;
-//     age: number;
-//   };
-// };
-
-// export const originalTeamToExpectedTeam = (originalTeam: Team): Team => {
-//   //
-// };
+export type Team = {
+  name: string;
+  captain: {
+    name: string;
+    age: number;
+  };
+};
+
+export const originalTeamToExpectedTeam2 = (
+  originalTeam: Team
+  // eslint-disable-next-line
+    // @ts-ignore
+): Team => {
+  const result: Team = JSON.parse(JSON.stringify(originalTeam));
+
+  result.captain.age = 28;
+
+  return result;
+};

src/lesson13/homework/pureFunctions.test.ts

@@ -1,44 +1,40 @@
 test("dummy test", () => undefined);
 
-/*
-
 import { getTopName, Team, QsObj, createQs, parseQs } from "./pureFunctions";
 
 test("it works", () => expect(true).toBe(true));
 
-// test("getTopName", () => {
-//   const teams: Team[] = [
-//     { name: "Lions", score: 5 },
-//     { name: "Tigers", score: 4 },
-//     { name: "Bears", score: 6 },
-//     { name: "Monkeys", score: 2 },
-//   ];
-
-//   expect(getTopName(teams)).toBe("Bears");
-// });
-
-// test("createQs", () => {
-//   const qsObj: QsObj = {
-//     page: "2",
-//     pageSize: "10",
-//     total: "205",
-//     somethingElse: "value",
-//   };
-
-//   expect(createQs(qsObj)).toBe(
-//     "?page=2&pageSize=10&total=205&somethingElse=value"
-//   );
-// });
-
-// test("parseQs", () => {
-//   const qs = "?page=2&pageSize=10&total=205&somethingElse=value";
-
-  expect(parseQs(qs)).toBe({
+test("getTopName", () => {
+  const teams: Team[] = [
+    { name: "Lions", score: 5 },
+    { name: "Tigers", score: 4 },
+    { name: "Bears", score: 6 },
+    { name: "Monkeys", score: 2 },
+  ];
+
+  expect(getTopName(teams)).toBe("Bears");
+});
+
+test("createQs", () => {
+  const qsObj: QsObj = {
     page: "2",
     pageSize: "10",
     total: "205",
     somethingElse: "value",
-  });
+  };
+
+  expect(createQs(qsObj)).toBe(
+    "?page=2&pageSize=10&total=205&somethingElse=value"
+  );
 });
 
-*/
+test("parseQs", () => {
+  const qs = "?page=2&pageSize=10&total=205&somethingElse=value";
+
+  expect(parseQs(qs)).toStrictEqual({
+    page: "2",
+    pageSize: "10",
+    total: "205",
+    somethingElse: "value",
+  });
+});

src/lesson13/homework/pureFunctions.ts

@@ -1,19 +1,52 @@
 // // Задание 1
-// export type Team = { name: string; score: number };
+export type Team = { name: string; score: number };
 
-// export const getTopName = (teams: Team[]): string => {
-//   //
-// };
+export const getTopName = (
+  teams: Team[]
+  // eslint-disable-next-line
+  // @ts-ignore
+): string => {
+  const maxTeam: Team = teams.reduce((maxTeam: Team, item: Team) =>
+    item.score > maxTeam.score ? item : maxTeam
+  );
+
+  return maxTeam.name;
+};
 
 // // Задание 2
-// export type QsObj = Record<string, string | number | boolean | object>;
+export type QsObj = Record<string, string | number | boolean | object>;
+
+export const createQs = (
+  qsObj: QsObj
+  // eslint-disable-next-line
+  // @ts-ignore
+): string => {
+  const params: Array<string> = [];
+
+  for (const [key, value] of Object.entries(qsObj)) {
+    params.push(`${key}=${value}`);
+  }
 
-// export const createQs = (qsObj: QsObj): string => {
-//   //
-// };
+  return "?" + params.join("&");
+};
 
 // // Задание 3
 
-// export const parseQs = (qs: string): QsObj => {
-//   //
-// };
+export const parseQs = (
+  qs: string
+  // eslint-disable-next-line
+  // @ts-ignore
+): QsObj => {
+  qs = qs.replace("?", "");
+
+  const parser = (str: string, delimeter: string) => str.split(delimeter);
+
+  const result = parser(qs, "&").reduce((result: {}, item) => {
+    const value = parser(item, "=");
+    // @ts-ignore
+    result[value[0]] = value[1];
+    return result;
+  }, {});
+
+  return result;
+};

src/lesson13/homework/ramdaPureFunctions.test.ts

@@ -1,5 +1,4 @@
 test("dummy test", () => undefined);
-/*
 
 import {
   getTopName,
@@ -9,30 +8,37 @@ import {
   parseQs,
 } from "./ramdaPureFunctions";
 
-// });
+test("getTopName", () => {
+  const teams: Team[] = [
+    { name: "Lions", score: 5 },
+    { name: "Tigers", score: 4 },
+    { name: "Bears", score: 6 },
+    { name: "Monkeys", score: 2 },
+  ];
 
-// test("createQs", () => {
-//   const qsObj: QsObj = {
-//     page: "2",
-//     pageSize: "10",
-//     total: "205",
-//     somethingElse: "value",
-//   };
+  expect(getTopName(teams)).toBe("Bears");
+});
+
+test("createQs", () => {
+  const qsObj: QsObj = {
+    page: "2",
+    pageSize: "10",
+    total: "205",
+    somethingElse: "value",
+  };
 
-//   expect(createQs(qsObj)).toBe(
-//     "?page=2&pageSize=10&total=205&somethingElse=value"
-//   );
-// });
+  expect(createQs(qsObj)).toBe(
+    "?page=2&pageSize=10&total=205&somethingElse=value"
+  );
+});
 
-// test("parseQs", () => {
-//   const qs = "?page=2&pageSize=10&total=205&somethingElse=value";
+test("parseQs", () => {
+  const qs = "?page=2&pageSize=10&total=205&somethingElse=value";
 
-  expect(parseQs(qs)).toBe({
+  expect(parseQs(qs)).toStrictEqual({
     page: "2",
     pageSize: "10",
     total: "205",
     somethingElse: "value",
   });
 });
-
-*/