unary

v0.9.6

STATUS

Passing

DOWNLOADS

VISIBILITY

Public

PUBLISHED

5 years ago

SIZE

1020 B

Wraps a function of any arity (including nullary) in a function that accepts exactly 1 parameter.

Function

Utils

1 contributor

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unary (

fn:Function

) : Function

Wraps a function of any arity (including nullary) in a function that accepts exactly 1 parameter. Any extraneous parameters will not be passed to the supplied function.

Example

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

     const takesOneArg = R.unary(takesTwoArgs);
     takesOneArg.length; //=> 1
     // Only 1 argument is passed to the wrapped function
     takesOneArg(1, 2); //=> [1, undefined]

Argument

fn: Function

The function to wrap.

Returns

Function

A new function wrapping `fn`. The new function is guaranteed to be of arity 1.