Some string comparison functions which have been written to help me grok the algorithms. If you are after this kind of thing and more natural language goodness, I'd recommend checking out natural.
NOTE: I'm not a maths / algorithms geek, and the implementation here could probably be sped up / made more correct by someone if they wanted to. If you are that kind of person though, your time is probably better spent refining the implementation in the natural library.
At the moment, check out the tests for example usage, but it kind of looks like this:
;// --> 0.944;// --> 0.961
strcmp;// --> 0.9444444444444445strcmp;// --> 0.9611111111111111
Copyright (c) 2015 Damon Oehlman firstname.lastname@example.org
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.