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Fix typos in Chapter 16 #51

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Fix typos in Chapter 16 #51

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e675ddd
fix: fix examples in Assertion functions
federikos Jul 30, 2024
58771fe
fix: fix link to exercise 4
federikos Jul 30, 2024
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13 changes: 8 additions & 5 deletions book-content/chapters/16-the-utils-folder.md
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Original file line number Diff line number Diff line change
Expand Up @@ -496,8 +496,9 @@ function assertIsAlbum(input: unknown): asserts input is Album {
"artist" in input &&
"year" in input
) {
throw new Error("Not an Album!");
return;
}
throw new Error("Not an Album!");
}
```

Expand All @@ -522,8 +523,9 @@ function assertIsAlbum(input: unknown): asserts input is Album {
"artist" in input &&
"year" in input
) {
throw new Error("Not an Album!");
return;
}
throw new Error("Not an Album!");
}
// ---cut---
function getAlbumTitle(item: unknown) {
Expand All @@ -548,11 +550,12 @@ For example, if the `assertIsAlbum` function doesn't check for all the required
```typescript
function assertIsAlbum(input: unknown): asserts input is Album {
if (typeof input === "object") {
throw new Error("Not an Album!");
return;
}
throw new Error("Not an Album!");
}

let item = null;
let item: unknown = null;

assertIsAlbum(item);

Expand Down Expand Up @@ -877,7 +880,7 @@ it("Should accept a custom error", () => {

Your task is to update the `addCodeToError` type signature to enforce the required constraints so that `TError` is required to have a `message` property and can optionally have a `code` property.

<Exercise title="Exercise 4: Type Parameter Constraints" filePath="/src/085-the-utils-folder/216-type-parameter-defaults-in-generic-functions.problem.ts"></Exercise>
<Exercise title="Exercise 4: Type Parameter Constraints" filePath="/src/085-the-utils-folder/218-type-parameter-constraints-with-generic-functions.problem"></Exercise>

### Exercise 5: Combining Generic Types and Functions

Expand Down