rubico/_internal/curry2.js

[a]synchronous functional programming

const __ = require('./placeholder')

// argument resolver for curry2
const curry2ResolveArg0 = (
  baseFunc, arg1,
) => function arg0Resolver(arg0) {
  return baseFunc(arg0, arg1)
}

// argument resolver for curry2
const curry2ResolveArg1 = (
  baseFunc, arg0,
) => function arg1Resolver(arg1) {
  return baseFunc(arg0, arg1)
}

/**
 * @name curry2
 *
 * @synopsis
 * ```coffeescript [specscript]
 * __ = Symbol('placeholder')
 *
 * curry2(
 *   baseFunc function,
 *   arg0 __|any,
 *   arg1 __|any,
 * ) -> function
 * ```
 *
 * @description
 * Curry a binary function.
 *
 * Note: exactly one argument must be the placeholder
 */
const curry2 = function (baseFunc, arg0, arg1) {
  return arg0 == __
    ? curry2ResolveArg0(baseFunc, arg1)
    : curry2ResolveArg1(baseFunc, arg0)
}

module.exports = curry2