从多维数组中提取所有名为x的变量-Javascript

Question

I've searched through everything I can on SO and elsewhere but can't find an answer, this is mostly due to my limited JS knowledge.

Could anyone tell me how to extract values from an array that is similar to the following (enhanced ecommerce array in dataLayer);

var products = [
{ brand: "brandx", category: "categorya", name: "name123" },
{ brand: "brandy", category: "categoryb", name: "name345" }
];

I would just like to extract the name in this case and end up with another array with just the values in, eg [name123,name345]. I'd like to push this into the dataLayer again, but I think I can do that part myself.

I did have some success but that was only in selecting the first name value.

Thank you in advance for any help anyone can offer

Matt

Answer 1

.map为此！

var names = products.map(function(product) { return product.name });

Answer 2

Assuming your name property is always there, it's as simple as that:

var products = [
{ brand: "brandx", category: "categorya", name: "name123" },
{ brand: "brandy", category: "categoryb", name: "name345" }
];

var result = [];
for (var i = 0; i < products.length; i++){
    result.push(products[i].name);
}

If IE below version 9 is not a concern, you can use map as well, as pointed out by @tymeJV :)

Answer 3

This was already answered here.

You could use .map or a for loop:

var namesArray = [];
for(index in products) {
  namesArray.push(products[index].name);
}
namesArray;
=> [ 'name123', 'name345' ]

Here is more information on for in loops from MDN

Answer 4

here's an example using forEach :

 var products = [ { brand: "brandx", category: "categorya", name: "name123" }, { brand: "brandy", category: "categoryb", name: "name345" } ]; var names = []; products.forEach(function(x){ names.push(x.name) }) console.log(names) 

Answer 5

What you want to do is pass your array into a map function. Example using underscore.js

var newArray=_.map(products, function(value){return value.name})

A map function takes an array (or object), runs each value through an iteree, and returns a new array.