CommonJS version comparison library for Titanium

app.js

var version = require('version');

if (version.atLeast('3.1.0')) {
  Ti.API.info('Your Ti.version is at least 3.1.0');
}

if (version.olderThan('3.1.0')) {
  Ti.API.info('Your Ti.version is older then 3.1.0');
}

// Returns TRUE if first version is at least second version
var result = version.atLeast('3.1.0', '3.1.0'); // TRUE

// Returns TRUE if first version is at older than second version
var result = version.olderThan('3.0.0', '3.0.0'); // FALSE

// Returns 0 if equal
// Returns -1 if 'a' smaller than 'b'
// Returns 1 if 'a' bigger than 'b'
var result = version.compare(a,b);

version.js

function compare(a, b) {
    var i, cmp, len, re = /(\.0)+[^\.]*$/;
    a = (a + '').replace(re, '').split('.');
    b = (b + '').replace(re, '').split('.');
    len = Math.min(a.length, b.length);
    for( i = 0; i < len; i++ ) {
        cmp = parseInt(a[i], 10) - parseInt(b[i], 10);
        if( cmp !== 0 ) {
            return cmp;
        }
    }
    return a.length - b.length;
}

function atLeast(a, b) {
    
    if (!b) {
        b = a;
        a = Ti.version;
    }
    
    return compare(a, b) >= 0;
}

function olderThan(a, b) {
    
    if (!b) {
        b = a;
        a = Ti.version;
    }
    
    return compare(a, b) < 0;
}

exports.compare = compare;
exports.atLeast = atLeast;
exports.olderThan = olderThan;

VERSION.md

The Titanium docs tell you Ti.version is a number, but it's not... it's a string, that can include stuff like beta, GA etc.

• Thanks to Mads Møller for bringing the string-thing to my attention.
• Thanks to TheAzureShadow for the original code.