Hash arrays of numbers into sortable strings with variable precision loss
Hash arrays of numbers into a string from which you can reconstruct the original values, with configurable precision loss. The generated hashes sort well, so similar input values cause large shared prefixes in hashes.
== 'w07w1z0gs3y0';== 'w07x1e1cs2yk';
Hash the array
[10, -10, 10] and then restore it, using differend
var sortable = ;var hash = sortable;// => 'p4pp5e9cbbuk'sortable;// => [ 9.999942779541016,// -9.999942779541016,// 9.999942779541016 ]var biggerHash = sortable;// => 'p4pp5e9cbbukqnpp5e9cbbukqnpp5e9cb3h'sortable;// => [ 10, -10, 10 ]
Hash the array
values, which may only contain Numbers in the range of
options can either be an object with those possible keys:
precision: Length of the resulting hash
or a Number, in which case it sets
string into an Array of Numbers.
numValues needs to be the number
of elements initially passed to
With npm do:
$ npm install sortable-hash
This is the idea of geohashes generalized for use with all numeric data and numbers of input fields.
Copyright (c) 2013 Julian Gruber <email@example.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.