57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
"use strict";
|
|
|
|
var test = function (arg1, arg2) { return arg2; };
|
|
|
|
try {
|
|
Object.defineProperty(test, "length", {
|
|
configurable: true,
|
|
writable: false,
|
|
enumerable: false,
|
|
value: 1
|
|
});
|
|
}
|
|
catch (ignore) {}
|
|
|
|
if (test.length === 1) {
|
|
// ES2015+
|
|
var desc = { configurable: true, writable: false, enumerable: false };
|
|
module.exports = function (length, fn) {
|
|
if (fn.length === length) return fn;
|
|
desc.value = length;
|
|
return Object.defineProperty(fn, "length", desc);
|
|
};
|
|
return;
|
|
}
|
|
|
|
module.exports = function (length, fn) {
|
|
if (fn.length === length) return fn;
|
|
switch (length) {
|
|
case 0:
|
|
return function () { return fn.apply(this, arguments); };
|
|
case 1:
|
|
return function (ignored1) { return fn.apply(this, arguments); };
|
|
case 2:
|
|
return function (ignored1, ignored2) { return fn.apply(this, arguments); };
|
|
case 3:
|
|
return function (ignored1, ignored2, ignored3) { return fn.apply(this, arguments); };
|
|
case 4:
|
|
return function (ignored1, ignored2, ignored3, ignored4) {
|
|
return fn.apply(this, arguments);
|
|
};
|
|
case 5:
|
|
return function (ignored1, ignored2, ignored3, ignored4, ignored5) {
|
|
return fn.apply(this, arguments);
|
|
};
|
|
case 6:
|
|
return function (ignored1, ignored2, ignored3, ignored4, ignored5, ignored6) {
|
|
return fn.apply(this, arguments);
|
|
};
|
|
case 7:
|
|
return function (ignored1, ignored2, ignored3, ignored4, ignored5, ignored6, ignored7) {
|
|
return fn.apply(this, arguments);
|
|
};
|
|
default:
|
|
throw new Error("Usupported function length");
|
|
}
|
|
};
|