Q.jsメモ

qについてのメモ

whenを使う
 whenでQ.when(5, onFulfilled)とQ(5).then(onFulfilled)は同じ

Q.when(1)
.then(function(a){
    console.log(a)
    var d = Q.defer();
    setTimeout(function() {
        a += 1;
        d.resolve(a);
    }, 1000);
    return d.promise;
})
.then(function(a){
    console.log(a)
    var d = Q.defer();
    setTimeout(function() {
        a += 1;
        d.resolve(a);
    }, 500);
    return d.promise;
})
.done(function(a){
    console.log(a)
});

notifyを使う
 notify

Q.when(1)
.then(function(a){
    var d = Q.defer();
    setTimeout(function() {
        for (var i = 1; i < 10; i++) {
            d.notify(i);
        }   
        d.resolve("foo");
    }, 1000);
    return d.promise;
})
.then(
    function(a){
        console.log(a)
    },
    null,
    function(a) {
        console.log(a);
    }
);
//1
//2
//3
//4
//5
//6
//7
//8
//9
//"foo"

allを使う
allはすべてがfulfillな場合は結果の配列を返す。
rejectされた場合があったときは最初にrejectされたものを返す。

Q.all(
    [
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve(100);
            }, 1000);
            return d.promise;
        }(),
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve(123);
            }, 500);
            return d.promise;
        }(),
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve("8");
            }, 550);
            return d.promise;
        }()
    ]
)
.then(function(a){
    console.log("onFulfilled");
    console.log(a);
},function(a){
    console.log("onRejected");
    console.log(a);
});
//onFulfilled
//[100, 123, "8"] 


Q.all(
    [
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.reject(100);
            }, 1000);
            return d.promise;
        }(),
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve(123);
            }, 500);
            return d.promise;
        }(),
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.reject("8");
            }, 550);
            return d.promise;
        }()
    ]
)
.then(function(a){
    console.log("onFulfilled");
    console.log(a);
},function(a){
    console.log("onRejected");
    console.log(a);
});
//onRejected 
//"8"


Q.all(
    [
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve(100);
            }, 1000);
            return d.promise;
        }(),
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve(123);
            }, 500);
            return d.promise;
        }(),
        function(){
            var d = Q.defer();
            setTimeout(function() {
                d.resolve("8");
            }, 550);
            return d.promise;
        }()
    ]
)
.spread(function(a1, a2, a3){
    console.log("onFulfilled");
    console.log(a1);
    console.log(a2);
    console.log(a3);
},function(a1,a2, a3){
    console.log("onRejected");
    console.log(a1);
    console.log(a2);
    console.log(a3);
});
//onFulfilled
//123
//100
//"8"


Q.all(
[
    function(){
        var d = Q.defer();
        setTimeout(function() {
            d.reject(100);
        }, 1000);
        return d.promise;
    }(),
    function(){
        var d = Q.defer();
        setTimeout(function() {
            d.resolve(123);
        }, 500);
        return d.promise;
    }(),
    function(){
        var d = Q.defer();
        setTimeout(function() {
            d.reject("8");
        }, 550);
        return d.promise;
    }()
]
)
.spread(function(a1, a2, a3){
    console.log("onFulfilled");
    console.log(a1);
    console.log(a2);
    console.log(a3);
},function(a1,a2, a3){
    console.log("onRejected");
    console.log(a1);
    console.log(a2);
    console.log(a3);
});
//onRejected
//"8"
//undefined
//undefined