binarySearch

binarySearch

Finds an item in a sorted array.

Parameters:
Name Type Description
array Array The sorted array to search.
itemToFind Object The item to find in the array.
comparator Function The function to use to compare the item to elements in the array. The first parameter passed to the comparator function is an item in the array, the second is itemToFind. If the array item is less than itemToFind, the function should return a negative value. If it is greater, the function should return a positive value. If the items are equal, it should return 0.
Returns:
Number 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.
Example
// Create a comparator function to search through an array of numbers.
var comparator = function (a, b) {
    return a - b;
};
var numbers = [0, 2, 4, 6, 8];
var index = Cesium.binarySearch(numbers, 6, comparator); // 3
Source: