Get index of parent given a value of a child array of arrays-CodePudding

I'm trying to get the index of the parent given an element inside the children, for example, I have a list variable (2) [Array(1), Array(2)] with this structure:

[
    [
        {id: "1",contactType: {id: "phoneNumber",company: {id: "01",name: "Company01"}},value: "5555555555"},
    ],
    [
        {id: "2",contactType: {id: "phoneNumber",company: {id: "03",name: "Company03"}},value: "7777777777"},
        {id: "3",contactType: {id: "phoneNumber",company: {id: "05",name: "Company05"}},value: "8888888888"},
    ],
]

I tried using includes and findIndex to verify if such element exist first and then get the parent index:

list.includes('5555555555', 0);

I expected to get true because I asked include to begin searching in index 0 of the list exactly where "5555555555" element is, but i got false instead.

Also tried with:

list.findIndex(x => x.value === '5555555555');

I expected 0 since element 5555555555 is in parent 0 index. But got -1 instead.

I also tried using flat() to get into the children and the use includes, but then I lose the 0 and 1 index of the original list.

Expected output:

foo(list,'7777777777'); should return 1 since that element is inside the second array of the list or foo(list,'8888888888'); should also return 1 since that element is also inside the second array of the list.

Can someone guide me on how to approach this issue?

CodePudding user response：

Use Array.findIndex with condition

const data = [
[
    {id: "1",contactType: {id: "phoneNumber",company: {id: "01",name: "Company01"}},value: "5555555555"},
],
[
    {id: "2",contactType: {id: "phoneNumber",company: {id: "03",name: "Company03"}},value: "7777777777"},
    {id: "3",contactType: {id: "phoneNumber",company: {id: "05",name: "Company05"}},value: "8888888888"},
],
];

const index = data.findIndex(item => item.findIndex(node => node.value === "5555555555") > -1);
console.log(index)

CodePudding user response：

const arr = [
[
    {id: "1",contactType: {id: "phoneNumber",company: {id: "01",name: "Company01"}},value: "5555555555"},
],
[
    {id: "2",contactType: {id: "phoneNumber",company: {id: "03",name: "Company03"}},value: "7777777777"},
    {id: "3",contactType: {id: "phoneNumber",company: {id: "05",name: "Company05"}},value: "8888888888"},
],
];
const index = arr.flat().findIndex(item => item.value === "7777777777")
console.log(index);