// Get index of object with specific value in array
const needle = 3; // needle
const haystack = [{ id: 1 }, { id: 2 }, { id: 3 }]; // haystack
const index = haystack.findIndex(item => item.id === needle);// Get index of object with specific value in array
const needle = 3;
const haystack = [{ id: 1 }, { id: 2 }, { id: 3 }];
const index = haystack.findIndex(item => item.id === needle);var list = ["apple","banana","orange"]
var index_of_apple = list.indexOf("apple") // 0const array1 = [5, 12, 8, 130, 44];
const search = element => element > 13;
console.log(array1.findIndex(search));
// expected output: 3
const array2 = [
{ id: 1, dev: false },
{ id: 2, dev: false },
{ id: 3, dev: true }
];
const search = obj => obj.dev === true;
console.log(array2.findIndex(search));
// expected output: 2const Season = [
{
month:'January',
season: 'Winter',
},
{
month:'March',
season: 'Spring',
},
{
month:'June',
season: 'Summer',
},
{
month:'August',
season: 'Autumn',
},
]
const index = Season.findIndex( (loopVariable) => loopVariable.month === 'March');
console.log("The index of March Month is",index)array.indexOf("item");