A mimetic poly-alloy of the Quicksilver scoring algorithm, essentially
Flex matching short abbreviations against longer strings is a boon in productivity for typists. Applications like Quicksilver, Alfred, LaunchBar, and Launchy have made this method of keyboard entry a popular one. It's time to bring this same functionality to web controls. LiquidMetal makes scoring long strings against abbreviations easy.
How You Can Help
Include the library:
Score any string against an abbreviation:
LiquidMetal.score("FooBar", "foo") //=> 0.950 LiquidMetal.score("FooBar", "fb") //=> 0.917 LiquidMetal.score("Foo Bar", "fb") //=> 0.929 LiquidMetal.score("Foo Bar", "baz") //=> 0.0 LiquidMetal.score("Foo Bar", "") //=> 0.8
All scores fall between a range of 0.0 (no match) to 1.0 (perfect match).
- To satisfy my own requirements for the jquery.flexselect plugin
- The Quicksilver algorithm doesn't give proper weight to abbreviations that match the first character of the scored string.
- The Quicksilver algorithm is extremely slow for certain length string/abbreviation combinations because of its use of recursion. While slightly slower for shorter length string/abbreviation combinations, LiquidMetal outperforms the Quicksilver algorithm by orders of magnitude under other conditions.
- More tests
- Consider tweaking the scores for "trailing" characters
- Improve implementation of highest score matching (LiquidMetal currently returns the highest scoring match for an abbreviation, but is inefficient)
- See if it's possible to tune the performance further
Copyright (c) 2009-2014, Ryan McGeary (ryan -[at]- mcgeary [dot] org)