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Finds the first item in a sorted array greater than or equal to a value.


Use binary-search-bounds instead.


First install using npm:

npm install lower-bound

Then use as follows:

var lb = require("lower-bound")
console.log(lb([0, 1, 1, 1, 2], 1))     // Prints 1 
console.log(lb([0, 1, 1, 1, 2], 1.5))   // Prints 3 

require("lower-bound")(array, value[, compare, lo, hi])

Uses a binary search to find the first item which is >= to value in array.

  • array a sorted list of items
  • value the item to find
  • compare a comparison function (optional)
  • lo a lower bound to search on (optional)
  • hi an upper bound on the range to search on (optional)


(c) 2013 Mikola Lysenko. MIT License