Array Types example error

[MyErpSoft]

When reading Array Types at https://github.com/Microsoft/TypeScript-Handbook/blob/master/pages/Interfaces.md . I noticed that :

In this example, length's type does not match the string index's type, and the type-checker gives an error:

interface NumberDictionary {
    [index: string]: number;
    length: number;    // ok, length is a number
    name: string;      // error, the type of 'name' is not a subtype of the indexer
}

I think this should be changed:

In this example, name's type does not match the number index's type, and the type-checker gives an error:

interface NumberDictionary {
    [index: string]: number;
    length: number;    // ok, length is a number
    name: string;      // error, the type of 'name' is not a subtype of the indexer
}

Sorry, my English is very bad. :-)

[DanielRosenwasser]

Hi there @MyErpSoft, I'm not sure what you mean. length's type is number, which satisfies the string index signature type (number), so I don't see the problem with the code as it exists.

Additionally, your second code sample is exactly the same as your first. That might have been a copy/paste error.

[zhongsp]

@DanielRosenwasser He's going to point out that there's a typo here:
Change:

In this example, length's type does not match the numb...

To

In this example, name's type does not match the numb...

:)

[DanielRosenwasser]

Ah! I missed that. Sorry @MyErpSoft, I should have read more closely.

As a heads up, you can make it more obvious that you're quoting something by putting a > in front of it. See "Blockquotes" on GitHub's Markdown Guide.

[DanielRosenwasser]

Should be fixed now. Thanks for finding these errors!