spnz.js

// spinoza for Nashorn shell (jjs)
// original code => https://github.com/kenokabe/spinoza

// [usage example]
//
// > jjs
// jjs> load("spnz.js")
// ===== spinoza =====
// jjs> world = $(1)(2)(3)(out)
// world-> 1,2,3

var console = {
    info: print,
    log: print
};

(function() {
    'use strict';
    console.log('===== spinoza =====');

    var info = function(type, info) {
        console.info(type + '->', info);
    };

    var type = function(obj) {
        return Object.prototype.toString.call(obj).slice(8, -1);
    };

    var $ = function(obj) {
        var i = 0;
        var s = [obj];
        var fs = function(obj) {
            s[++i] = obj;
            fs.s = s;
            return fs;
        };
        fs.s = s;
        return fs;
    };

    var fseq = function(s) {
        var fs = function() {};
        fs.s = s;
        return fs;
    };

    var compute = function(fs) {
        if (type(fs) != 'Function'){ return fs }

        var length = fs.s.length;
        if (length === 1) { return fs.s }

        var last_s = fs.s[length - 1];
        if (type(last_s) != 'Function') { return fs.s; }

        var s = fseq( fs.s.slice(0, length - 1) );
        return compute( last_s(s) );
    };

    var out = function(fs) {
        var z = compute(fs);
        info('world', z);
        return z;
    };

    Object.defineProperties(
        this,
        {
            world: { set: function(fs) { return compute(fs) } }
        });

    this.$ = $;
    this.out = out;
    this.compute = compute;

    //module.exports = spinoza;
}.call(this));


// library
var plus10 = function(fs) {
    var f = function(x) { return x + 10 };
    return fs.s.map(f)
};