javascript

CHAPTER 6 ■ FUNCTIONS AND ARRAYS
Object.defineProperties = function (obj, descriptors) {
for (descriptor in descriptors) {
if (descriptors.hasOwnProperty(descriptor)) {
obj[descriptor] = descriptors[descriptor].value;
}
}
};
}
if (Object.create === undefined) {
Object.create = function (parent, descriptors) {
var Proxy = function () {},
child;
Proxy.prototype = parent;
child = new Proxy();
if (descriptors !== undefined) {
Object.defineProperties(child, descriptors);
}
return child;
};
}
Function.prototype.bind = Function.prototype.bind ||
function (obj) {
var that = this;
};
By way of the comma operator, define another variable named ossify. Then borrow the slice()
method from an empty array literal with the call() method, which slice() inherits from
Function.prototype as any other function would. Then we’ll invoke slice() in order to save any
unnamed arguments passed to bind() as an array. So, ossify does not contain obj, just any additional
arguments.
if (Object.defineProperties === undefined) {
Object.defineProperties = function (obj, descriptors) {
for (descriptor in descriptors) {
if (descriptors.hasOwnProperty(descriptor)) {
obj[descriptor] = descriptors[descriptor].value;
}
}
};
}
if (Object.create === undefined) {
Object.create = function (parent, descriptors) {
var Proxy = function () {},
child;
Proxy.prototype = parent;
child = new Proxy();
if (descriptors !== undefined) {
Object.defineProperties(child, descriptors);
}
return child;
};
}
Function.prototype.bind = Function.prototype.bind ||
function (obj) {
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