获取数组内给定对象的索引[重复]

Question

为什么我不能得到数组中给定对象的索引？

var Sentences = {

    1: {

        sentence: [

            {
                reference: "1",
            },

            {
                reference: "2",
            },

            {
                reference: "3",
            },

            {
                reference: "4",
            },

            {
                reference: "5",
            },
        ],
    },
}


const data = 
{
reference: "3",
}

const sentenceIndex = Sentences[1].sentence.indexOf(data);

console.log(sentenceIndex);

期望的结果显然是2…

Answer 1

使用findIndex方法并检查reference属性。

var Sentences = {
  1: {
    sentence: [
      {reference: "1",},
      {reference: "2",},
      {reference: "3",},
      {reference: "4",},
      {reference: "5",},
    ],
  },
}


const data = {reference: "3"}

const sentenceIndex = Sentences[1].sentence.findIndex(({
  reference
}) => reference === data.reference);

console.log(sentenceIndex);