scoreunder

Reorders function's first two arguments to make underscore or lodash more functional

scoreunder

Makes _ more functional.

Underscore and lodash are great libraries, but they have tiny defect: they put the data first and callback second. This arguments order makes it very difficult to compose functions. Scoreunder provides tiny utility function to fix this.

// underscore / lodash 
function isPositive(a) { return a > 0; }
_.every([1, 2, 3], isPositive); // true 

We cannot bind isPositive to _.every function even from the right, because _.every has signature _.every(collection, [callback=identity], [thisArg])

Using scoreunder we can:

var under = require('scoreunder');
function isPositive(a) { return a > 0; }
var everyPositive = under.partialFn(_.every, isPositive);
everyPositive([1, 2, 3]); // true 

NPM: npm install scoreunder --save

Creates new function with swapped first and second argument

_.every([1, 2, 3], isPositive); // true 
var _every = under.ba(_.every);
_every(isPositive, [1, 2, 3]); // true 

Reorders arguments using .ba then partial applies given function.

var everyPositive = under.partialFn(_.every, isPositive);
everyPositive([1, 2, 3]); // true 

Because Hey Underscore, You're Doing It Wrong! by Brian Lonsdorf. Switching to another library like wu or ramda is too extreme.

Plus I find that putting callback first leads to code that is more elegant.

Author: Gleb Bahmutov © 2014

License: MIT - do anything with the code, but don't blame me if it does not work.

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Support: if you find any problems with this module, email / tweet / open issue on Github

Copyright (c) 2014 Gleb Bahmutov

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.