File: incrementOnNullAssertion.ts

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node-typescript 3.3.3333-1
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// @strict: true
interface Dictionary<T> {
    [myFavouriteType: string]: T | undefined
}
const x = 'bar'
let foo: Dictionary<number> = {}
if (foo[x] === undefined) {
    foo[x] = 1
}
else {
    let nu = foo[x]
    let n = foo[x]
    foo[x]!++
}