fucntion add(x, y) {
return x + y;
}
let myAdd = function(x, y) { return x + y };
function add(x: number, y: number): number {
return x + y;
}
let myAdd = function(x: number, y: number): number { return x + y };
let myAdd: (baseValue: number, increment: number) => number =
function(x: number, y: number): number { return x + y; };
let myAdd = function(x: number, y: number): number { return x + y; };
let myAdd: (baseValue: number, increment: number) => number =
function(x, y) { return x + y; };
function buildName(firstName: string, lastName?: string) {
if (lastName)
return firstName + " " + lastName;
else
return firstName;
}
let result1 = buildName("Bob");
let result2 = buildName("Bob", "Adams", "Sr.");
let result3 = buildName("Bob", "Adams");
function buildName(firstName: string, lastName = "Smith") {
return firstName + " " + lastName;
}
let result1 = buildName("Bob");
let result2 = buildName("Bob", undefined);
let result3 = buildName("Bob", "Adams", "Sr.");
let result4 = buildName("Bob", "Adams");
buildName(firstName: string, lastName?: string)
buildName(firstName = "Will", lastName: string)
function buildName(firstName = "Will", lastName: string) {
return firstName + " " + lastName;
}
let result1 = buildName("Bob");
let result2 = buildName("Bob", "Adams", "Sr.");
let result3 = buildName("Bob", "Adams");
let result4 = buildName(undefined, "Adams");
function buildName(firstName: string, ...restOfName: string[]) {
return firstName + " " + restOfName.join(" ");
}
let employeeName = buildName("Joseph", "Samuel", "Lucas", "MacKinzie");
let deck = {
suits: ["hearts", "spades", "clubs", "diamonds"],
cards: Array(52),
createCardPicker: function() {
return () => {
let pickedCard = Math.floor(Math.random() * 52);
let pickedSuit = Math.floor(pickedCard / 13);
return {suit: this.suits[pickedSuit], card: pickedCard % 13};
}
}
}
let cardPicker = deck.createCardPicker();
let pickedCard = cardPicker();
alert("card: " + pickedCard.card + " of " + pickedCard.suit);
interface Card {
suit: string;
card: number;
}
interface Deck {
suits: string[];
cards: number[];
createCardPicker(this: Deck): () => Card;
}
let deck: Deck = {
suits: ["hearts", "spades", "clubs", "diamonds"],
cards: Array(52),
createCardPicker: function(this: Deck) {
return () => {
let pickedCard = Math.floor(Math.random() * 52);
let pickedSuit = Math.floor(pickedCard / 13);
return {suit: this.suits[pickedSuit], card: pickedCard % 13};
}
}
}
let cardPicker = deck.createCardPicker();
let pickedCard = cardPicker();
alert("card: " + pickedCard.card + " of " + pickedCard.suit);
let suits = ["hearts", "spades", "clubs", "diamonds"];
function pickCard(x: {suit: string; card: number; }[]): number;
function pickCard(x: number): {suit: string; card: number; };
function pickCard(x): any {
if (typeof x == "object") {
let pickedCard = Math.floor(Math.random() * x.length);
return pickedCard;
}
else if (typeof x == "number") {
let pickedSuit = Math.floor(x / 13);
return { suit: suits[pickedSuit], card: x % 13 };
}
}
let myDeck = [{ suit: "diamonds", card: 2 }, { suit: "spades", card: 10 }, { suit: "hearts", card: 4 }];
let pickedCard1 = myDeck[pickCard(myDeck)];
alert("card: " + pickedCard1.card + " of " + pickedCard1.suit);
let pickedCard2 = pickCard(15);
alert("card: " + pickedCard2.card + " of " + pickedCard2.suit);