undercut

Undercut allows you to build mixins such as everyStartsWith and filterEndsWith into underscore. It is made for people who are generally lazy and love terse code.

Getting Started

Install the module with: git clone https://github.com/mlconnor/undercut

var _ = require('underscore'),
    validator = require('validator'),
    undercut = require('undercut');

_.mixin(undercut.filterMixins(_, underscoreString, ["startsWith", "endsWith"]));

Documentation

(Coming soon)

Examples

var _ = require('underscore'),
    validator = require('validator'),
    undercut = require('undercut');

_.mixin(undercut.filterMixins(_, underscoreString, ["startsWith", "endsWith"]));

This would mixin the following functions in underscore.

  everyEndsWith()
  everyStartsWith()
  filterEndsWith()
  filterStartsWith()
  findEndsWith()
  findStartsWith()
  rejectEndsWith()
  rejectStartsWith()
  someEndsWith()
  someStartsWith() 

Undercut will basicallly take all the methods you give it and prepend every, find, filter, reject, some to each. The idea is that instead of writing...

_.filter("foobar", function(val) { val.startsWith("foo"); });

You can simply write.

_.filterStartsWith("foobar", "foo");

Here are some more examples using the validator module.

_.mixin(undercut.filterMixins(_, validator, [
  "contains",
  "matches",
  "isDivisibleBy",
  "isLength",
  "isDate",
  "isAfter",
  "isBefore",
  "isNull",
  "isIn"
]));

And then you can...

/* returns ['abc','axl']) */
_.filterStartsWith(['abc','def','axl'], 'a');

/* returns ['axl'] */
_.filterEndsWith(['abc','def','axl'], 'l');

/* returns ['axl'] */
_.filterEndsWith(['abc',null,'axl'], 'l');

/* returns true */
_.everyContains(['abc','dadf','axl'], 'a');

/* returns [] */
_.filterContains(['abc','dadf','axl'], 'z'));

/* returns true */
_.everyMatches  (['abc','cbc','fbz'], "\\Sb\\S"));

/* returns true */
_.someMatches   (['zzz','cbc','zzz'], "\\Sb\\S"));

/* returns ['zzz','zzz'] */
_.filterMatches (['zzz','cbc','zzz'], "z+");

/* returns [12,15] */
_.filterIsDivisibleBy ([11,12,13,14,15], 3));

/* returns ["defg"] */
_.filterIsLength(["a","abc","defg"], 4));

/* returns false */
_.everyIsDate   (["1/23/1996", "2/11/2004", "foo"]);

/* returns true */
_.everyIsDate   (["1/23/1996", "2/11/2004", "6/12/2012"]));

/* returns [1,2,3,true] */
_.rejectIsNull  ([1,2,3,true,null]);

/* returns true */
_.everyIsBefore (["1/10/2014","2/12/2014"], new Date()));

/* returns true */
_.everyIsAfter  (["1/10/2030","2/12/2030"], new Date()));

/* returns true */
_.everyIsIn     (["CA","GA","OH"], ["AL","AK","GA","OH","CA","FL","MI"]));

/* returns true */
_.someIsIn      (["YY","XX","OH"], ["AL","AK","GA","OH","CA","FL","MI"]));

/* returns ["OH"] */
_.filterIsIn    (["YY","XX","OH"], ["AL","AK","GA","OH","CA","FL","MI"]);

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Release History

(Nothing yet)

License

Copyright (c) 2014 Michael Connor. Licensed under the MIT license.