dot-lens

Extremely fast dot lenses. Generated lenses are compiled javascript functions.

Installation

Install with npm

$ npm install dot-lens

Example

var lens = require('dot-lens');

var person = {
  name: {
    first: "bill",
    last: "casarin"
  },
  tags: ["unfunny", "poor"]
}

var last = lens("name.last")
last.get(person) // "casarin"
last.set(person, "hi") // person.name.last === "hi"

var firstTag = lens("tags.0")
firstTag.set(person, "funny") // person.tags[0] === "funny"

Benchmarks

$ matcha bench.js


                      get a.b.c
         705,079 op/s » dot-component
      71,653,205 op/s » dot-lens

                      set a.b.c
         628,264 op/s » dot-component
      65,321,100 op/s » dot-lens


  Suites:  2
  Benches: 4
  Elapsed: 5,127.90 ms

License

The MIT License (MIT)

Copyright (c) 2014 William Casarin

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.