Checkpoint 7 - Function Binding

1번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

setTimeout(function() {
alice.sayHi();
}, 1000);

1번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

Bob says hi, immediately

 

2번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

setTimeout(alice.sayHi, 1000); 

setTimeout(function() {
alert(this.name + " says hi");
}, 1000); // 실행될때의 this결정

2번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

 

Bob says hi, immediately

3번 - What message will eventually be alerted? After how long?

 

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

setTimeout(alice.sayHi.bind(alice), 1000);

3번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

Bob says hi, immediately

 

4번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

setTimeout(alice.sayHi(), 1000);

4번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, immediately

Alice says hi, after 1 second

Bob says hi, immediately

Bob says hi, after 1 second

 

5번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

setTimeout(alice.sayHi.bind(bob), 1000);

5번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

Bob says hi, immediately

 

6번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

setTimeout(alice.sayHi.call(bob), 1000);

6번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

Bob says hi, immediately

 

7번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

bob.sayHi = alice.sayHi

bob.sayHi = function() {
alert(this.name + " says hi");
}

setTimeout(bob.sayHi, 1000);

7번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

Bob says hi, immediately

 

8번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

var sayHi = alice.sayHi.bind(bob)

 

setTimeout(function () {
window.sayHi()
}, 1000);

8번 질문의 답을 선택하세요. *

Window says hi, after 1 second

Window says hi, immediately

Alice says hi, after 1 second

Alice says hi, immediately

Bob says hi, after 1 second

Bob says hi, immediately

 

9번 - What message will eventually be alerted? After how long?

var name = "Window";
var alice = {
name: "Alice",
sayHi: function() {
alert(this.name + " says hi");
}
};
var bob = { name: "Bob" };

alice.sayHi.bind(bob); // 리턴이 바로 사라져버림

setTimeout(alice.sayHi(), 1000);

9번 질문의 답을 선택하세요. *

Window says hi, after 1 second

 

Window says hi, immediately

 

Alice says hi, after 1 second

 

Alice says hi, immediately

 

Bob says hi, after 1 second

 

Bob says hi, immediately