was.js
| /tags/1.0.9/lib/lambda/aggregators.js |
|---|
| @@ -0,0 +1,47 @@ |
| /*************************************************************************/ |
| /* Copyright (C) 2017 Wizardry and Steamworks - License: GNU GPLv3 */ |
| /*************************************************************************/ |
| /* fuss/lambda_calculus/functional_programming/aggregators @ grimore.org */ |
| /*************************************************************************/ |
| function wasSwitch(q, d, ...c) { |
| if(c.length % 2 !== 0) { |
| throw "Pairs of predicates expected for cases"; |
| } |
| (Array.isArray(q) ? q : [ q ]).forEach((s) => { |
| var m = false; |
| for(var i = 0; i < c.length; i += 2) { |
| if(!c[i](s)) { |
| continue; |
| } |
| if(!c[i + 1](s)) { |
| continue; |
| } |
| m = true; |
| } |
| if(!m) { |
| d(s); |
| } |
| }); |
| } |
| if (!Array.prototype.switch) { |
| Array.prototype.switch = function() { |
| wasSwitch(this, arguments[0], arguments.slice(1)); |
| }; |
| } |
| // jQuery |
| if(typeof jQuery === 'function') { |
| $.extend({ |
| switch: wasSwitch |
| }); |
| } |
| /*************************************************************************/ |
| /* Node.JS package export. */ |
| /*************************************************************************/ |
| if(typeof module !== 'undefined' && typeof module.exports !== 'undefined') { |
| module.exports.lambda = { |
| switch: wasSwitch |
| }; |
| } |