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71596648c2
This feels a bit more semantically appropriate: it more clearly says "here's some information: there is no (relevant) recipient", rather than "no information available". (Both `null` and `undefined` in JS can have either meaning, but `undefined` especially commonly means the latter.) Concretely, it ensures a bit more explicitness where the value originates: a bare `return;` becomes `return null;`, reflecting the fact that it is returning a quite informative value. Also make the implementation more explicit about what's expected here, replacing truthiness tests with `!== null`. (A bit more idiomatic would be `!= null`, which is equivalent when the value is well-typed and a bit more robust to ill-typing bugs. But lint complains about that version.)
19 lines
348 B
Plaintext
19 lines
348 B
Plaintext
/**
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* @flow strict
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*/
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"use strict";
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type RecipientUserIds = number[];
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type Worker = {|
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get_current_time: () => number, // as ms since epoch
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notify_server_start: RecipientUserIds => void,
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notify_server_stop: RecipientUserIds => void
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|};
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declare export function update(
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worker: Worker,
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new_recipient: RecipientUserIds | null
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): void;
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