binarySearch(array, itemToFind, comparator)Number

Finds an item in a sorted array.
Name Type Description
array Array The sorted array to search.
itemToFind Object The item to find in the array.
comparator binarySearch~Comparator The function to use to compare the item to elements in the array.
The index of itemToFind in the array, if it exists. If itemToFind does not exist, the return value is a negative number which is the bitwise complement (~) of the index before which the itemToFind should be inserted in order to maintain the sorted order of the array.
// Create a comparator function to search through an array of numbers.
function comparator(a, b) {
    return a - b;
var numbers = [0, 2, 4, 6, 8];
var index = Cesium.binarySearch(numbers, 6, comparator); // 3

Type Definitions

Comparator(a, b)Number

A function used to compare two items while performing a binary search.
Name Type Description
a Object An item in the array.
b Object The item being searched for.
Returns a negative value if a is less than b, a positive value if a is greater than b, or 0 if a is equal to b.
function compareNumbers(a, b) {
    return a - b;