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103 lines
3.1 KiB
Markdown
103 lines
3.1 KiB
Markdown
---
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id: 6a0dcc730cb92a616f86f0c2
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title: "Challenge 298: Schema Validator Part 4"
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challengeType: 28
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dashedName: challenge-298
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---
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# --description--
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Given an object (JavaScript) or dictionary (Python), determine if it matches the following schema:
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```json
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Roles = "user" | "creator" | "moderator" | "staff" | "admin"
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{
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username: string,
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posts: number,
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verified: boolean,
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role: Roles,
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supporter?: boolean
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}
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```
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- The pipe (`|`) symbol means "or". `role` must be one of the listed `Roles` values.
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- The question mark (`?`) after `supporter` means that the field is optional, but is the specified type if it exists.
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- Extra keys are allowed
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# --hints--
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`isValidSchema({ username: "vivian", posts: 1, verified: false, role: "user", supporter: true })` should return `true`.
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```js
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assert.isTrue(isValidSchema({ username: "vivian", posts: 1, verified: false, role: "user", supporter: true }));
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```
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`isValidSchema({ username: "rudolph", posts: 15, verified: true, role: "creator" })` should return `true`.
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```js
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assert.isTrue(isValidSchema({ username: "rudolph", posts: 15, verified: true, role: "creator" }));
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```
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`isValidSchema({ username: "hernandez", posts: 35, verified: true, role: "moderator", supporter: false, followers: 55 })` should return `true`.
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```js
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assert.isTrue(isValidSchema({ username: "hernandez", posts: 35, verified: true, role: "moderator", supporter: false, followers: 55 }));
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```
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`isValidSchema({ username: "julia", posts: 50, verified: true, role: "admin", supporter: "true" })` should return `false`.
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```js
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assert.isFalse(isValidSchema({ username: "julia", posts: 50, verified: true, role: "admin", supporter: "true" }));
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```
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`isValidSchema({ username: "bernard", posts: 0, verified: true, role: "friend", supporter: true })` should return `false`.
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```js
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assert.isFalse(isValidSchema({ username: "bernard", posts: 0, verified: true, role: "friend", supporter: true }));
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```
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`isValidSchema({ username: "felix", posts: 40, verified: "yes", role: "staff", supporter: false })` should return `false`.
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```js
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assert.isFalse(isValidSchema({ username: "felix", posts: 40, verified: "yes", role: "staff", supporter: false }));
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```
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`isValidSchema({ username: "jimmy", posts: true, verified: false, role: "creator", supporter: true })` should return `false`.
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```js
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assert.isFalse(isValidSchema({ username: "jimmy", posts: true, verified: false, role: "creator", supporter: true }));
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```
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`isValidSchema({ username: true, posts: 30, verified: true, role: "moderator", supporter: false })` should return `false`.
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```js
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assert.isFalse(isValidSchema({ username: true, posts: 30, verified: true, role: "moderator", supporter: false }));
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```
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# --seed--
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## --seed-contents--
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```js
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function isValidSchema(obj) {
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return obj;
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}
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```
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# --solutions--
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```js
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function isValidSchema(obj) {
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const roles = ["user", "creator", "moderator", "staff", "admin"];
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return (
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typeof obj.username === 'string' &&
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typeof obj.posts === 'number' &&
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typeof obj.verified === 'boolean' &&
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roles.includes(obj.role) &&
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(obj.supporter === undefined || typeof obj.supporter === 'boolean')
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);
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}
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```
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