Package Exports

binary-search-bounds

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Readme

binary-search-bounds

Binary search on arrays.

API

var bounds = require("binary-search-bounds")

`bounds.lt(array, y[, cmp, lo, hi])`

Returns the index of the last item in the array < y

`bounds.le(array, y[, cmp, lo, hi])`

Returns the index of the last item in the array <= y

`bounds.gt(array, y[, cmp, lo, hi])`

Returns the index of the first item in the array > y

`bounds.ge(array, y[, cmp, lo, hi])`

Returns the index of the first item in the array >= y

Notes

cmp is a comparison function, just like what you would pass to Array.sort()
y will always be the second argument passed to cmp, so you can ignore it if you are just binary searching on a predicate
lo gives a lower bound on the array index to search
hi gives an upper bound on the array index to search
bounds.le and bounds.lt will return lo - 1 if no element is found satisfying the predicate
bounds.ge and bounds.gt will return hi + 1 if no element is found satisfying the predicate