حفاظت از اشیا با تایپ اسکریپت — راهنمای کاربردی

1{
2  "name": "ts-protected",
3  "version": "1.0.0",
4  "description": "",
5  "main": "index.js",
6  "scripts": {
7    "start": "npx ts-node-dev --respawn protected.ts"
8  },
9  "keywords": [],
10  "author": "",
11  "license": "ISC",
12  "devDependencies": {
13    "ts-node-dev": "^1.0.0-pre.44",
14    "typescript": "^3.7.2"
15  }
16}

1class BankAccount {
2    checking;
3    savings;
4
5    constructor(checking, savings) {
6        this.checking = checking;
7        this.savings = savings;
8    }
9}

1class BankAccount {
2    checking;
3    savings;
4
5    constructor(checking, savings) {
6        this.checking = checking;
7        this.savings = savings;
8    }
9
10    accountDetails() {
11        console.log(`Checking: ${this.checking}, Savings: ${this.savings}`);
12    }
13}
14
15const myAccount = new BankAccount(500, 10000);
16myAccount.accountDetails();
17
18myAccount.checking = 0;
19myAccount.savings = "hahahaha";
20myAccount.accountDetails();

1class BankAccount {
2    checking: number;
3    savings: number;
4
5    constructor(checking: number, savings: number) {
6        this.checking = checking;
7        this.savings = savings;
8    }
9
10    accountDetails() {
11        console.log(`Checking: ${this.checking}, Savings: ${this.savings}`);
12    }
13}
14
15const myAccount = new BankAccount(500, 10000);
16myAccount.accountDetails();
17
18myAccount.checking = 0;
19myAccount.savings = "hahahaha";
20myAccount.accountDetails();

1class BankAccount {
2    private checking: number;
3    private savings: number;
4
5    constructor(checking: number, savings: number) {
6        this.checking = checking;
7        this.savings = savings;
8    }
9
10    accountDetails() {
11        console.log(`Checking: ${this.checking}, Savings: ${this.savings}`);
12    }
13}
14
15const myAccount = new BankAccount(500, 10000);
16myAccount.accountDetails();
17
18myAccount.checking = 0;
19myAccount.savings = "hahahaha";
20myAccount.accountDetails();

1myAccount.checking = 0;
2myAccount.savings = "hahahaha";

1class BankAccount {
2    private checking: number;
3    private savings: number;
4
5    constructor(checking: number, savings: number) {
6        this.checking = checking;
7        this.savings = savings;
8    }
9
10    accountDetails() {
11        console.log(`Checking: ${this.checking}, Savings: ${this.savings}`);
12    }
13
14    setChecking(newAmount: number) {
15        if (newAmount < -10000 || newAmount > 10000) {
16            throw new Error('Checking value is out of range');
17        }
18        this.checking = newAmount;
19    }
20
21    setSavings(newAmount: number) {
22        if (newAmount < 0 || newAmount > 1000000) {
23            throw new Error('Savings value is out of range');
24        }
25        this.savings = newAmount;
26    }
27
28}
29
30const myAccount = new BankAccount(500, 10000);
31myAccount.accountDetails();
32
33// Change checking amount to valid value
34console.log('Changing checking amount to new valid amount');
35myAccount.setChecking(5000);
36myAccount.accountDetails();
37
38try {
39    // Change checking amount to invalid value
40    console.log('Changing checking amount to invalid amount');
41    myAccount.setChecking(-20000);
42    myAccount.accountDetails();
43} catch (error) {
44    console.error(error);
45}
46
47// Change savings amount to valid value
48console.log('Changing savings amount to new valid amount');
49myAccount.setSavings(42000);
50myAccount.accountDetails();
51
52try {
53    // Change savings amount to invalid value
54    console.log('Changing savings amount to invalid amount');
55    myAccount.setSavings(-1);
56    myAccount.accountDetails();
57} catch (error) {
58    console.error(error);
59}

1class BankAccount {
2    private checking: number;
3    private savings: number;
4
5    constructor(checking: number, savings: number) {
6        this.checking = checking;
7        this.savings = savings;
8    }
9
10    accountDetails() {
11        console.log(`Checking: ${this.checking}, Savings: ${this.savings}`);
12    }
13
14    setChecking(newAmount: number) {
15        if (newAmount < -10000 || newAmount > 10000) {
16            throw new Error('Checking value is out of range');
17        }
18        this.checking = newAmount;
19    }
20
21    setSavings(newAmount: number) {
22        if (newAmount < 0 || newAmount > 1000000) {
23            throw new Error('Savings value is out of range');
24        }
25        this.savings = newAmount;
26    }
27
28    getSavings(): number {
29        return this.savings;
30    }
31
32}
33
34const myAccount = new BankAccount(500, 10000);
35myAccount.accountDetails();
36
37// Change checking amount to valid value
38console.log('Changing checking amount to new valid amount');
39myAccount.setChecking(5000);
40myAccount.accountDetails();
41
42try {
43    // Change checking amount to invalid value
44    console.log('Changing checking amount to invalid amount');
45    myAccount.setChecking(-20000);
46    myAccount.accountDetails();
47} catch (error) {
48    console.error(error);
49}
50
51// Change savings amount to valid value
52console.log('Changing savings amount to new valid amount');
53myAccount.setSavings(42000);
54myAccount.accountDetails();
55
56try {
57    // Change savings amount to invalid value
58    console.log('Changing savings amount to invalid amount');
59    myAccount.setSavings(-1);
60    myAccount.accountDetails();
61} catch (error) {
62    console.error(error);
63}
64
65let savingsRef = myAccount.getSavings();
66savingsRef = -100;
67myAccount.accountDetails();