Esempio.
Viene eseguito su cscript.exe, su Windows.
// define the Car class
(function() {
// makeClass - By John Resig (MIT Licensed)
// Allows either new User() or User() to be employed for construction.
function makeClass(){
return function(args){
if (this instanceof arguments.callee) {
if (typeof this.init == "function")
this.init.apply(this, (args && args.callee) ? args : arguments);
} else
return new arguments.callee(arguments);
};
}
Car = makeClass();
Car.prototype.init = function(make, model, price, topSpeed, weight) {
this.make = make;
this.model = model;
this.price = price;
this.weight = weight;
this.topSpeed = topSpeed;
};
})();
// create a list of cars
var autos = [
new Car("Chevy", "Corvair", 1800, 88, 2900),
new Car("Buick", "LeSabre", 31000, 138, 3700),
new Car("Toyota", "Prius", 24000, 103, 3200),
new Car("Porsche", "911", 92000, 155, 3100),
new Car("Mercedes", "E500", 67000, 145, 3800),
new Car("VW", "Passat", 31000, 135, 3700)
];
// a list of sorting functions
var sorters = {
byWeight : function(a,b) {
return (a.weight - b.weight);
},
bySpeed : function(a,b) {
return (a.topSpeed - b.topSpeed);
},
byPrice : function(a,b) {
return (a.price - b.price);
},
byModelName : function(a,b) {
return ((a.model < b.model) ? -1 : ((a.model > b.model) ? 1 : 0));
},
byMake : function(a,b) {
return ((a.make < b.make) ? -1 : ((a.make > b.make) ? 1 : 0));
}
};
function say(s) {WScript.Echo(s);}
function show(title)
{
say ("sorted by: "+title);
for (var i=0; i < autos.length; i++) {
say(" " + autos[i].model);
}
say(" ");
}
autos.sort(sorters.byWeight);
show("Weight");
autos.sort(sorters.byModelName);
show("Name");
autos.sort(sorters.byPrice);
show("Price");
È inoltre possibile effettuare una sorter generale.
var byProperty = function(prop) {
return function(a,b) {
if (typeof a[prop] == "number") {
return (a[prop] - b[prop]);
} else {
return ((a[prop] < b[prop]) ? -1 : ((a[prop] > b[prop]) ? 1 : 0));
}
};
};
autos.sort(byProperty("topSpeed"));
show("Top Speed");
@durilai: JavaScript ** ** è orientato agli oggetti, il modello OO di JavaScript si basa su * * Prototyping ed è molto, molto versatile ... http://en.wikipedia.org/wiki/ Prototype-based_programming – CMS
odora di compiti a casa? – Cheeso
Mi raccomando di usare lodash.js: https: // lodash.com/docs # sortBy –