was.js – Rev 30

?pathlinks?

Rev 29 – Rev 34 – Go to most recent revision – Blame – Compare with Previous – Last modification – View Log – Download

/*************************************************************************/
/*    Copyright (C) 2017 Wizardry and Steamworks - License: GNU GPLv3    */
/*************************************************************************/
/* fuss/lambda_calculus/functional_programming/aggregators @ grimore.org */
/*************************************************************************/
// Vanilla ES6 JavaScript
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(d, ...c) {
        wasSwitch(this, d, ...c);
    };
}
// jQuery
if(typeof jQuery === 'function') {
    $.extend({
        switch: wasSwitch
    });
}

/*************************************************************************/
/* Node.JS package export.                                               */
/*************************************************************************/
module.exports.lambda = {
    switch: wasSwitch
};