diff --git a/README.md b/README.md index b3277f17e..87b5208f4 100644 --- a/README.md +++ b/README.md @@ -171,12 +171,18 @@ const currentUrl = _ => window.location.href; Use recursion. If the number of provided arguments (`args`) is sufficient, call the passed function `f`. Otherwise return a curried function `f` that expects the rest of the arguments. +If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`. ```js -const curry = f => - (...args) => - args.length >= f.length ? f(...args) : (...otherArgs) => curry(f)(...args, ...otherArgs); +const curry = (f, arity = f.length, next) => + (next = prevArgs => + nextArg => { + const args = [ ...prevArgs, nextArg ]; + return args.length >= arity ? f(...args) : next(args); + } + )([]); // curry(Math.pow)(2)(10) -> 1024 +// curry(Math.min, 3)(10)(50)(2) -> 2 ``` ### Deep flatten array diff --git a/snippets/curry.md b/snippets/curry.md index 4bcfee3c6..edb95461f 100644 --- a/snippets/curry.md +++ b/snippets/curry.md @@ -3,16 +3,14 @@ Use recursion. If the number of provided arguments (`args`) is sufficient, call the passed function `f`. Otherwise return a curried function `f` that expects the rest of the arguments. -If you want to curry a function that accepts a variable number of arguments (variadic function) like Math.min for example, you can optionally pass the number of arguments to the second parameter arity. +If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`. ```js -const curry = (f, arity = f.length, next) => - (next = prevArgs => +const curry = (f, arity = f.length, next) => + (next = prevArgs => nextArg => { - const args = [ ...prevArgs, nextArg ] - return args.length >= arity - ? f(...args) - : next(args); + const args = [ ...prevArgs, nextArg ]; + return args.length >= arity ? f(...args) : next(args); } )([]); // curry(Math.pow)(2)(10) -> 1024