then

v0.9.6

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Passing

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PUBLISHED

5 years ago

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4 KB

Returns the result of applying the onSuccess function to the value inside a successfully resolved promise.

Async

Promise

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then (

onSuccess:Function,

p:Promise

) : Promise

Returns the result of applying the onSuccess function to the value inside a successfully resolved promise. This is useful for working with promises inside function compositions.

Example

var makeQuery = (email) => ({ query: { email }});

     //getMemberName :: String -> Promise ({firstName, lastName})
     var getMemberName = R.pipe(
       makeQuery,
       fetchMember,
       R.then(R.pick(['firstName', 'lastName']))
     );

Arguments

onSuccess: Function

The function to apply. Can return a value or a promise of a value.

p: Promise

Returns

Promise

The result of calling `p.then(onSuccess)`