node_modules/binary-search-bounds/example/example.js

var bounds = require('../search-bounds')

//Create an array
var array = [1, 2, 3, 3, 3, 5, 6, 10, 11, 13, 50, 1000, 2200]

//Print all elements in array contained in the interval [3, 50)
console.log(
  array.slice(
    bounds.ge(array, 3),
    bounds.lt(array, 50)))

//Test if array contains the element 4
console.log('indexOf(6)=', bounds.eq(array, 6))
console.log('indexOf(4)=', bounds.eq(array, 4))

//Find the element immediately after 13
console.log('successor of 13 =', array[bounds.gt(array, 13)])

//Find the element in the array before 4
console.log('predecessor of 4 =', array[bounds.lt(array, 4)])

//Create an array of objects
var creatures = [
  { legs: 8, name: 'spider' },
  { legs: 4, name: 'mouse' },
  { legs: 4, name: 'cat' },
  { legs: 2, name: 'Ben Franklin' },
  { legs: 4, name: 'table', isCreature: false },
  { legs: 100, name: 'centipede' },
  { legs: 4, name: 'dog' },
  { legs: 6, name: 'ant' }
]

//Sort the array by number of legs
function byLegs(a,b) { return a.legs - b.legs }
creatures.sort(byLegs)

//Find the next creature with more than 4 legs
console.log('What has more than 4 legs? Answer:', creatures[bounds.gt(creatures, {legs:4}, byLegs)])