function partialUsingArguments(fn) { let args1 = Array.prototype.slice.call(arguments, 1) return function() { let args2 = Array.prototype.slice.call(arguments, 0) return fn.apply(this, args1.concat(args2)) } }
function partialUsingArguments(fn) { let args1 = Array.prototype.slice.call(arguments, 1) return function() { let args2 = Array.prototype.slice.call(arguments, 0) return fn.apply(this, args1.concat(args2)) } }