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HW-8: part1, part2 #1

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23 changes: 10 additions & 13 deletions lessons/module2/4_FunctionalProgramming_Old/homework/immutability.test.ts
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Original file line number Diff line number Diff line change
@@ -1,12 +1,8 @@
test("dummy test", () => undefined);

import {
OriginalTeam,
ExpectedTeam,
originalTeamToExpectedTeam,
originalArrayToExpectedArray,
originalTeamToExpectedTeamDeep,
} from "./immutability";
/*

import { OriginalTeam, ExpectedTeam } from "./immutability";

// Задание 1
test("team to team", () => {
Expand All @@ -22,20 +18,19 @@ test("team to team", () => {
roster: 25,
};

expect(originalTeamToExpectedTeam(originalTeam)).toStrictEqual(expectedTeam);
expect(originalTeamToExpectedTeam(originalTeam)).toBe(expectedTeam);
});

// Задание 2
test("array to array", () => {
const originalArray = Object.freeze([1, 2, 3, 4]);

const expectedArray = ["two", 3, 4, 5];
expect(originalArrayToExpectedArray(originalArray)).toStrictEqual(
expectedArray
);

expect(originalArrayToExpectedArray(originalArray)).toBe(expectedArray);
});

// // Задание 3
// Задание 3
test("team to team deep", () => {
const originalTeam = Object.freeze({
name: "Tampa Bay Roosters",
Expand All @@ -53,5 +48,7 @@ test("team to team deep", () => {
},
};

expect(originalTeamToExpectedTeamDeep(originalTeam)).toEqual(expectedTeam);
expect(originalTeamToExpectedTeam(originalTeam)).toEqual(expectedTeam);
});

*/
68 changes: 29 additions & 39 deletions lessons/module2/4_FunctionalProgramming_Old/homework/immutability.ts
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Original file line number Diff line number Diff line change
@@ -1,49 +1,39 @@
// // Задание 1
export type OriginalTeam = {
size: number;
name: string;
league: string;
};
// export type OriginalTeam = {
// size: number;
// name: string;
// league: string;
// };

export type ExpectedTeam = {
name: string;
league: string;
roster: number;
};
// export type ExpectedTeam = {
// name: string;
// league: string;
// roster: number;
// };

export const originalTeamToExpectedTeam = (
originalTeam: OriginalTeam
): ExpectedTeam => {
const { league } = originalTeam;
return {
league: league,
roster: 25,
name: "New York Badgers",
};
};
// export const originalTeamToExpectedTeam = (
// originalTeam: OriginalTeam
// ): ExpectedTeam => {
// //
// };

// // Задание 2
type SomeArray = ReadonlyArray<number | string>;
// type SomeArray = Array<number | string>;

export const originalArrayToExpectedArray = (
originalArray: SomeArray
): SomeArray => {
const newArray = ["two", ...originalArray.slice(2), 5];
return newArray;
};
// const originalArrayToExpectedArray = (originalArray: SomeArray): SomeArray => {
// //
// };

// // Задание 3

export type Team = {
name: string;
captain: {
name: string;
age: number;
};
};
// export type Team = {
// name: string;
// captain: {
// name: string;
// age: number;
// };
// };

export const originalTeamToExpectedTeamDeep = (originalTeam: Team): Team => {
const newObj = JSON.parse(JSON.stringify(originalTeam));
newObj.captain.age = 28;
return newObj;
};
// export const originalTeamToExpectedTeam = (originalTeam: Team): Team => {
// //
// };
56 changes: 30 additions & 26 deletions lessons/module2/4_FunctionalProgramming_Old/homework/pureFunctions.test.ts
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Original file line number Diff line number Diff line change
@@ -1,35 +1,37 @@
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";
// 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)).toEqual({
page: "2",
Expand All @@ -38,3 +40,5 @@ test("parseQs", () => {
somethingElse: "value",
});
});

*/
37 changes: 10 additions & 27 deletions lessons/module2/4_FunctionalProgramming_Old/homework/pureFunctions.ts
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Original file line number Diff line number Diff line change
@@ -1,39 +1,22 @@
// // Задание 1
export type Team = { name: string; score: number };
// export type Team = { name: string; score: number };

export const getTopName = (teams: Team[]): string => {
let topTeam = teams[0];
teams.forEach((value, index) =>
value.score > topTeam.score ? (topTeam = teams[index]) : undefined
);
return topTeam.name;
};
// export const getTopName = (teams: Team[]): string => {
// //
// };

// // Задание 2
export type QsObj = Record<
string,
string | number | boolean | string[] | number[] | boolean[]
>;

export const createQs = (qsObj: QsObj): string => {
return (
"?" +
Object.keys(qsObj)
.map((key) => {
return `${key}=${qsObj[key]}`;
})
.join("&")
);
};
// export const createQs = (qsObj: QsObj): string => {
// //
// };

// // Задание 3

export const parseQs = (qs: string): QsObj => {
const pairs = (qs[0] === "?" ? qs.substr(1) : qs).split("&");
const result: QsObj = {};
pairs.forEach((value, index) => {
const insertingValue = value.split("=");
result[insertingValue[0]] = insertingValue[1];
});
return result;
};
// export const parseQs = (qs: string): QsObj => {
// //
// };