Question

我有一个这样的集合：

    var collection={
     "Today": [{
    "id": "1",
    "name": "iPod Nano",
    "image": "img/items/item1.jpg",
    "special": 0
}, {
    "id": "2",
    "name": "Samsung TV",
    "image": "img/items/item2.jpg",
    "special": 1
}],
"Monday 11 August 2014": [{
    "id": "3",
    "name": "Nikon Camera",
    "image": "img/items/item3.jpg",
    "special": 0

}, {
    "id": "4",
    "name": "iPad 1000",
    "image": "img/items/item4.jpg",
    "special": 0

}],

"Monday 30 August 2014 ": [{

    "id": "5",

    "name": "ar of Gold",
    "mage": "img / items / item5.jpg ",
    "special ": 1

}, {
    "id ": "6 ",
    " name ": "Buzz Light Year ",
    "image ": " img / items / item6.jpg ",
    "special ": 1

}]

};

我想过滤收藏并保持特殊== 1：

我试过了：

 var Specials=_.reduce(collection,function(memo,item){
                var result = _.filter(item,function(c){
                    return c.special==0 ;
                });
                if(result.length > 0 ){
                    var newResult = {};
                    newResult.deals = result;
                    newResult.id = item.id;
                    memo = _.union(memo,newResult);
                }
                return memo;
            },[]); 
            var jsonText=JSON.stringify(Specials);

            console.log("=========>" + jsonText);

但没有达到我的预期。

为什么呢？我希望结果如下：

var filtered={
"Today": [{
    "id": "2",
    "name": "Samsung TV",
    "image": "img/items/item2.jpg",
    "special": 1
}],

"Monday 30 August 2014 ": [{

    "id": "5",

    "name": "ar of Gold",
    "mage": "img / items / item5.jpg ",
    "special ": 1

}, {
    "id ": "6 ",
    " name ": "Buzz Light Year ",
    "image ": " img / items / item6.jpg ",
    "special ": 1

}]

};

Answer 1

我记得还有其他功能，

如果您需要保持相同的JSON结构，可以使用每个 + 拒绝 fiddle

_.each(collection, function(items, key){

    var filtered = _.reject(items, function(item){ 
        return item.special < 1 
    });

    if(filtered.length){
        specials[key] = filtered;
    }
});

Answer 2

您可以尝试：

   var collection = { 
  "Today": [
    {
    "id": "1",
    "name": "iPod Nano",
    "image": "img/items/item1.jpg",
     "special": 0
    }, 
    {
    "id": "2",
    "name": "Samsung TV",
    "image": "img/items/item2.jpg",
    "special": 1
    }
],

"Monday 11 August 2014": [
    {
    "id": "3",
    "name": "Nikon Camera",
    "image": "img/items/item3.jpg",
     "special": 0
    }, 
    {
    "id": "4",
    "name": "iPad 1000",
    "image": "img/items/item4.jpg",
     "special": 0
    }
]

};

for(var i in collection){
  collection[i] = _.filter(collection[i], function(item){
    return item.special == 0;
  });
}
console.log(collection);

结果将按天分组，如果要合并，则必须编写此

var res = [];
for(var j in collection){
  for(var i = 0; i < collection[j].length; i++)
    res.push(collection[j][i]);
}

console.log(res);

demo

使用下划线过滤遵循JSON

2 个答案: