Typescript variable assignment causes linting error

Question

I have a question about the following use of a typescript array. It all works fine but when I run it through the linter I get the following error, my assignment is obviously wrong.

Array type using 'Array' is forbidden for simple types. Use 'T[]' instead.

 export let data = [
  {
    "property": "value"
  }
 ];

export interface myInterface {
    property: string;
};

protected _collection: Array<myInterface>;

Any assistance is appreciated.

the edit you rejected made the <> characters you included in your question visible - they need to be escaped or they are not visible when the markup is rendered to HTML. This is also what Murat K. mentioned in his answer. — nickspoon
– nickspoon, Commented Aug 22, 2017 at 22:31

Nitzan Tomer · Accepted Answer · 2017-01-17 09:32:10Z

15

The linter probably just wants you to do:

protected _collection: myInterface[];

The types myInterface[] and Array<myInterface> are equivalent, but the linter seems to prefer the first.

answered Jan 17, 2017 at 9:32

Nitzan Tomer

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Murat Karagöz · Accepted Answer · 2017-01-17 09:36:57Z

2

Seems like the error stacktrace is not complete. The complete sentence is

Array type using 'Array<T>' is forbidden. Use 'T[]' instead.

You have to code format it on SO. And the reason for the linter is here in the source code of palantir

https://github.com/palantir/tslint/blob/master/src/rules/arrayTypeRule.ts#L81-L82

They want you to avoid using Array<T> in general. Instead you have to use it like this

protected _collection: myInterface[];

This is more like a preference from them.

answered Jan 17, 2017 at 9:36

Murat Karagöz

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2 Comments

Jimi Over a year ago

the sentence I posted is the one it's generating for me.

Murat Karagöz Over a year ago

I can see in your post that you copy pasted it with Array<T> but the displayed is Array that's what I meant. Nonetheless it's irrelevant for the reasoning.

toskv · Accepted Answer · 2017-01-17 09:32:02Z

1

Use [] instead of the Array type.

protected _collection: myInterface[];

If you want to use the Array type there should a tslint rule to disable.

answered Jan 17, 2017 at 9:32

toskv

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