我目前有一个部分应用程序功能,如下所示:
Function.prototype.curry = function()
{
var args = [];
for(var i = 0; i < arguments.length; ++i)
args.push(arguments[i]);
return function()
{
for(var i = 0; i < arguments.length; ++i)
args.push(arguments[i]);
this.apply(window, args);
}.bind(this);
}
问题是它只适用于非成员函数,例如:
function foo(x, y)
{
alert(x + y);
}
var bar = foo.curry(1);
bar(2); // alerts "3"
如何改写 curry 函数以应用于成员函数,如:
function Foo()
{
this.z = 0;
this.out = function(x, y)
{
alert(x + y + this.z);
}
}
var bar = new Foo;
bar.z = 3;
var foobar = bar.out.curry(1);
foobar(2); // should alert 6;