JAVASCRIPT

how to find the index of a value in an array in javascript

var list = ["apple","banana","orange"]

var index_of_apple = list.indexOf("apple") // 0

index of value in array

// for dictionary case use findIndex 
var imageList = [
   {value: 100},
   {value: 200},
   {value: 300},
   {value: 400},
   {value: 500}
];
var index = imageList.findIndex(img => img.value === 200);

find index in array javascript

// find index of array in javascript
const number = [1,6,2,8,1,0,4,2,7,5,4,1];
const index = number.findIndex(item => item === 8);
console.log(index)

Find the index of an item in the Array

fruits.push('Mango')
// ["Strawberry", "Banana", "Mango"]

let pos = fruits.indexOf('Banana')
// 1

get item in array from index

var valueAtIndex1 = myValues[1];

Find Index in Array

$scope.indexOfField = function(fieldId) {
    var fieldData = $scope.model.fieldData, 
        i = 0, ii = $scope.model.fieldData.length;
    for(i; i < ii; i++) if(fieldData[i].Id === fieldId) break;
    // use i
}