你可以有一個雙重嵌套的對象文字？

Question

我可以有一個雙重嵌套的對象字面值，如下面的「成分」的值（是正確的語法）？

recipes = [  
      {name: 'Zucchini Muffins', url: 'pdfs/recipes/Zucchini Muffins.pdf', 
      ingredients: [{name: 'carrot', amount: 13, unit: 'oz' }, 
          {name: 'Zucchini', amount: 3, unit: 'sticks'}] 
      } 
      ]; 

如果是這樣，我將如何訪問「成分」對象的「單位」值？

我可以這樣做嗎？

僞碼

for each recipes as recipe 
     print "this recipe requires" 
     for each recipe.ingredients as ingredients 
      ingredients.amount + " " + ingredients.unit; 

（我想用javascript的）

Answer 1

這是你可以讓你從這個陣列需要的所有相關信息（here is a jsfiddle）：

function printRecipes(recipeList) { 
    for(var i = 0; i < recipeList.length; i++) { //loop through all recipes 
     var recipe = recipeList[0], //get current recipe 
      ingredients = recipe.ingredients; //get all ingredients 
     console.log("This recipe is named", recipe.name, "and can be accessed via", recipe.url); 
     console.log("These are the ingredients:"); 
     for(var j = 0; j < ingredients.length; j++) { //loop through all ingredients of current recipe 
      var ingredient = ingredients[j]; //get current ingredient 
      console.log("You need", ingredient.amount, ingredient.name + "(s)", "mesured in", ingredient.unit); 
     } 
     console.log("Finished recipe", name + "'s", "ingredient list, passing to next recipe!"); 
    } 
}