62 lines
1.2 KiB
JavaScript
62 lines
1.2 KiB
JavaScript
//// [arrayLiteralContextualType.ts]
|
|
interface IAnimal {
|
|
name: string;
|
|
}
|
|
|
|
class Giraffe {
|
|
name = "Giraffe";
|
|
neckLength = "3m";
|
|
}
|
|
|
|
class Elephant {
|
|
name = "Elephant";
|
|
trunkDiameter = "20cm";
|
|
}
|
|
|
|
function foo(animals: IAnimal[]) { }
|
|
function bar(animals: { [n: number]: IAnimal }) { }
|
|
|
|
foo([
|
|
new Giraffe(),
|
|
new Elephant()
|
|
]); // Legal because of the contextual type IAnimal provided by the parameter
|
|
bar([
|
|
new Giraffe(),
|
|
new Elephant()
|
|
]); // Legal because of the contextual type IAnimal provided by the parameter
|
|
|
|
var arr = [new Giraffe(), new Elephant()];
|
|
foo(arr); // Error because of no contextual type
|
|
bar(arr); // Error because of no contextual type
|
|
|
|
//// [arrayLiteralContextualType.js]
|
|
var Giraffe = (function () {
|
|
function Giraffe() {
|
|
this.name = "Giraffe";
|
|
this.neckLength = "3m";
|
|
}
|
|
return Giraffe;
|
|
})();
|
|
var Elephant = (function () {
|
|
function Elephant() {
|
|
this.name = "Elephant";
|
|
this.trunkDiameter = "20cm";
|
|
}
|
|
return Elephant;
|
|
})();
|
|
function foo(animals) {
|
|
}
|
|
function bar(animals) {
|
|
}
|
|
foo([
|
|
new Giraffe(),
|
|
new Elephant()
|
|
]);
|
|
bar([
|
|
new Giraffe(),
|
|
new Elephant()
|
|
]);
|
|
var arr = [new Giraffe(), new Elephant()];
|
|
foo(arr);
|
|
bar(arr);
|