gistfile1.txt

//based on https://github.com/krasimir/absurd/blob/master/lib/processors/html/helpers/TemplateEngine.js

//Basic
var TemplateEngine = function(tpl, data) {
    var re = /<%(.+?)%>/g, match;
    while(match = re.exec(tpl)) {
        tpl = tpl.replace(match[0], data[match[1]])
    }
    return tpl;
}
var template = 'Hello, my name is <%one%>. I\'m <%two%> years old.';
console.log(TemplateEngine(template, {
    one: "Krasimir",
    two: 29
}));

// Advance
var TemplateEngine = function(html, options) {
	var re = /<%(.+?)%>/g, 
		reExp = /(^( )?(var|if|for|else|switch|case|break|{|}|;))(.*)?/g, 
		code = 'with(obj) { var r=[];\n', 
		cursor = 0, 
		result;
	var add = function(line, js) {
		js? (code += line.match(reExp) ? line + '\n' : 'r.push(' + line + ');\n') :
			(code += line != '' ? 'r.push("' + line.replace(/"/g, '\\"') + '");\n' : '');
		return add;
	}
	while(match = re.exec(html)) {
		add(html.slice(cursor, match.index))(match[1], true);
		cursor = match.index + match[0].length;
	}
	add(html.substr(cursor, html.length - cursor));
	code = (code + 'return r.join(""); }').replace(/[\r\t\n]/g, ' ');
	try { result = new Function('obj', code).apply(options, [options]); }
	catch(err) { console.error("'" + err.message + "'", " in \n\nCode:\n", code, "\n"); }
	return result;
}


var template = 
'My skills:' + 
'<%if(this.showSkills) {%>' +
    '<%for(var index in this.skills) {%>' + 
    '<a href="#"><%this.skills[index]%></a>' +
    '<%}%>' +
'<%} else {%>' +
    '<p>none</p>' +
'<%}%>';
console.log(TemplateEngine(template, {
    skills: ["js", "html", "css"],
    showSkills: true
}));