用对象循环遍历数组

Question

I have the following problem which i can't solve for 2 days now. I have an array .

And I try to loop over it with next for..in loop

for (var key in products2) {
    if (products2.hasOwnProperty(key)) {
        console.log(products2[key].properties);
    }
}

But I can't output the value of properties object. This array is a list of products and each product has own properties.

Answer 1

You can use Lodash:

_.forEach([1, 2], function(value, index) {
    console.log(value, index);
});

Or you could use JavaScript:

var array = [1, 2]
for (var i in array) {
   alert(array[i]);
}

Answer 2

for (var key in products2) {
    console.log(products2[key].properties);
}

There is no " Key " property in " produts2 " array. Key variable is index of the "products2" array. Since if condition is not getting True, console statement is not getting executed.

Answer 3

首先，使用JSON.parse（product2）将其转换为对象，然后使用您的代码

Answer 4

It looks like an array with objects.

[{...}, {...}, {...}, ...]

For iterating the elements, you could use Array#forEach

products2.forEach(function (o) {
    Object.keys(o).forEach(function (k) {
        console.log(k, o[k]); // show key and value
    });
});

Answer 5

Try this

for (var i in products2) {
  for (key in products2[i]) {
    console.log(key + ":" + products2[i][key]);
  }
}

You have an array of objects. So first you will have to iterate through array items then you can iterate through its keys.