binary

v0.9.6

STATUS

Passing

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VISIBILITY

Public

PUBLISHED

5 years ago

SIZE

1020 B

Wraps a function of any arity (including nullary) in a function that accepts exactly 2 parameters.

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binary (

fn:Function

) : Function

Wraps a function of any arity (including nullary) in a function that accepts exactly 2 parameters. Any extraneous parameters will not be passed to the supplied function.

Example

const takesThreeArgs = function(a, b, c) {
       return [a, b, c];
     };
     takesThreeArgs.length; //=> 3
     takesThreeArgs(1, 2, 3); //=> [1, 2, 3]

     const takesTwoArgs = R.binary(takesThreeArgs);
     takesTwoArgs.length; //=> 2
     // Only 2 arguments are passed to the wrapped function
     takesTwoArgs(1, 2, 3); //=> [1, 2, undefined]

Argument

fn: Function

The function to wrap.

Returns

Function

A new function wrapping `fn`. The new function is guaranteed to be of arity 2.