Code on trywebsharper: Bugged version

Even though I specified the id let personList = ListModel.Create (fun i -> i.id) [], I can still add duplicate.

The id is defined as a int

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type Person = {
        id: int
        name: string
        nickname: string
    }

But if I convert it again using int:T->int signature let personList = ListModel.Create (fun i -> int i.id) [] then it will work, Fixed version

To add a duplicate here are the steps I took:

1. Add id:2 name:x nickname:x
2. Add id:1 name:y nickname:y

There will be 2x items with id:1.

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output:
Id: 1 Name: kimserey
Id: 2 Name: x
Id: 1 Name: y