过滤对象javascript中的数组

海象

也许是星期五早上，我有一点时间，但看不到为什么这不起作用。

我有这个JSON

var recipes = [{
            name: "Beef Lasagne",
            ingredients: [
                "mince",
                "pasta",
                "sauce",
                "tomatoes"
            ]}]

我可以这样做：recipes.filter(recipe => recipe.name.includes('e'))它可以正确过滤

但是，当我尝试这样做时： recipes.filter(recipe => recipe.ingredients.includes('e'))

我得到我试图在ex1中过滤字符串，然后在ex2中对数组进行即时过滤，我还需要做些什么才能使第二个过滤器正常工作？

雪莉

Array.includes()将寻找一个特定的元素。由于成分也是数组，因此您也需要遍历成分数组。

因此，按照书面规定，只有在成分相等的情况下它才有效：

    ingredients: [
        "mince",
        "pasta",
        "sauce",
        "tomatoes",
        "e"
    ]

因此，您可能想要类似：

recipes.filter( recipe => recipe.ingredients.some( ingredient => ingredient.includes( 'e' ) ) );

var recipes = [{
    name: "Beef Lasagne",
    ingredients: [
      "mince",
      "pasta",
      "sauce",
      "tomatoes"
    ]
  },
  {
    name: "Beef Lasagne without e",
    ingredients: [
      "minc",
      "past",
      "tomatos"
    ]
  },
  {
    name: "Beef Lasagne with sauce and no mince",
    ingredients: [
      "sauce",
      "pasta",
      "tomatoes"
    ]
  }
]

console.log(
    recipes.filter( recipe => recipe.ingredients.some( ingredient => ingredient.includes( 'e' ) ) )
)
console.log(
    recipes.filter( recipe => recipe.ingredients.some( ingredient => ingredient.startsWith( 'min' ) ) )
)

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