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docs(keep-trying-or-giveup): correct grammar
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### Instructions
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Create a `retry` function, that takes 2 arguments
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Create a `retry` function, that takes 2 arguments:
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- a `count` indicates maximum amount of retries
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- an async `callback`, that will be called on every try
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- `count`: indicates maximum number of retries.
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- `callback`: an `async` function that will be invoked for every attempt.
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`retry` returns a function that calls and returns value from `callback`
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function passing its arguments and catches errors. If error is caught it
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should return the `callback` function with catch. If number of errors
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exceeds `count` then throw an `Error`.
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`retry` returns a function that invokes the `callback` function. That function passes its arguments to `callback`, and returns the value from `callback`.
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> for count of 3, the function will be called at most 4 times:
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> the initial call + 3 retries.
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The function returned by `retry` must `catch` errors from `callback`. After that function has caught `count` errors, it must `throw` an `Error`.
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Create a `timeout` function, that takes 2 arguments
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> if `count` is 3, `callback` will be invoked at most 4 times, the initial call plus 3 retries.
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- a `delay` indicates maximum wait time
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- an async `callback`, that will be called
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Create function named `timeout`, that takes 2 arguments:
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`timeout` returns a function either that calls and returns value from `callback`
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function passing its arguments or returns `Error('timeout')` if `callback` didn't
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resolve before `delay` time has reached.
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- `delay`: indicates maximum wait time.
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- `callback`: an asynchronous function that will be invoked.
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`timeout` returns a function that invokes and returns the value from `callback`. The function must pass its arguments to `callback`. If `callback` does not resolve before `delay`, your function returns `Error('timeout')`.
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### Notions
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- [nan-academy.github.io/js-training/examples/promise.js](https://nan-academy.github.io/js-training/examples/promises.js)
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- [devdocs.io/dom/settimeout]( https://devdocs.io/dom/settimeout)
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- [devdocs.io/javascript/global_objects/promise/race](https://devdocs.io/javascript/global_objects/promise/race)
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- [Promises](https://nan-academy.github.io/js-training/examples/promises.js)
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- [setTimeout]( https://devdocs.io/dom/settimeout)
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- [Promise.race](https://devdocs.io/javascript/global_objects/promise/race)
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