JS Implementation inheritance

One, using constructors to implement "inheritance

Reference: JavaScript Object-oriented Programming (II): Inheritance of constructors

function extend (child, Parent) {

var F = function () {}; Using an empty object as a mediation F is an empty object, so it hardly accounts for memory.

F.prototype = Parent.prototype;

Child.prototype = new F ();

Child.prototype.constructor = child; Does not affect the parent

Child.uber = Parent.prototype; Spare

}

Second, the inheritance of the non-constructor function

Reference: JavaScript Object-oriented programming (c): Inheritance of non-constructors

Shallow copy

function Extendcopy (p) {

var c = {};

for (var i in P) {
C[i] = P[i];
}

C.uber = p;

return C;
}

Deep copy

function Deepcopy (p, c) {

var c = C | | {};

for (var i in P) {

if (typeof p[i] = = = ' object ') {

C[i] = (P[i].constructor = = = = Array)? [] : {};

Deepcopy (P[i], c[i]);

} else {

C[i] = P[i];

}
}

return C;
}

JS Implementation inheritance