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kondico

0.2.1 • Public • Published

Kondico

Functional conditions and compositions (uses Formi).

Status

Codeship Status for krambuhl/Kondico

Code Climate

Test Coverage

API Docs

Kondico exposes the Kondico function.

  • Kondico(boolean, [options]) -> Function
  • Kondico(func, [options]) -> Function

Kondico(boolean, [options])

Defines function that returns input boolean.

Example

var isTrue = Kondico(true);
isTrue(); // ==> true

Kondico(func, [options])

Defines function that returns result of a called function.

Example

var isDefined = Kondico(function(val) { return val !== undefined;  }); 
isDefined(640) // true
isDefined(undefined) // false

Kondico Options

Option Value Description
once Boolean Only run function body once, cache result
memoize Boolean/Function Only run function body once per input value

Kondico(func, { once: true })

Defines a function that runs it's body a single time, any subsequent calls will return that same value without running that function body.

Example

var hasJquery = Kondico(function() {
    return typeof jQuery === 'function';
}, { once: true });
 
if (hasJquery()) {
    $('html').addClass('has-jquery');
    alert('has jquery: ' + hasJquery());
}

Kondico(func, { memoize: true })

Defines a function that runs it's body a single time for each unique input, any subsequent calls with the same input will return the same value without running the function body.

memoize option can be a boolean value or a hashFunction that returns an id used to cache a functions return; hashFunction will return first argument by default.

Example

var has = Kondico(function(val) {
    return typeof val === 'function';
}, { memoize: true });
 
if (has(jQuery)) {
    $('html').addClass('has-jquery');
    alert('has jquery: ' + has(jQuery));
}

Compositions (Logic Gates)

Kondico defines logic gate function for composing more complex conditions. All functions will operate on any number of arguments. not returns an array if more than one argument is passed.

  • Kondico.not
  • Kondico.or
  • Kondico.and
  • Kondico.nor
  • Kondico.nand
  • Kondico.xor
  • Kondico.xnor

Example Useages

Media Queries

var smallSize = Kondico(function(val) { return val < 720;  }); 
var largeSize = Kondico(function(val) { return val > 1280; });
var mediumSize = Kondico.nor(smallSize, largeSize);
 
// example window size (960x720)
smallSize(window.innerWidth) // false
mediumSize(window.innerWidth) // true
largeSize(window.innerWidth) // false

Feature Detection

var hasCanvas = Kondico(function() {
    var elem = createElement('canvas');
    return !!(elem.getContext && elem.getContext('2d'));
}, { once: true }); 

install

npm i kondico

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version

0.2.1

license

MIT

homepage

github.com

repository

Gitgithub

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