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compare-cell

compare-cell

Compares two unordered integer sequences to test if they contain the same elements. This can be used to implement various algorithms for unoriented simplicial complexes.

For more information, see the following blog post:

Comparing sequences without sorting

Example

var compareCells = require('compare-cell')
var bsearch = require('binary-search-bounds')
 
//Create a list of triangles defined by indexed faces 
var triangles = [
  [1, 0, 2],
  [2, 1, 3],
  [3, 4, 5],
  [5, 6, 7]
]
 
//Sort triangles 
triangles.sort(compareCells)
 
//Now we can test if various cells are contained in the list in O(log n) 
console.log(bsearch.eq(triangles, [2, 1, 0], compareCells) >= 0)
console.log(bsearch.eq(triangles, [3, 5, 7], compareCells) >= 0)

API

var d = require('compare-cells')(a, b)

Tests if two unordered lists contain the same elements.

  • a, b are arrays of integers

Returns An order function which tests if a comes before or after b. The value is 0 if they are equal.

License

(c) 2015 Mikola Lysenko. MIT License