// sformat prototype as argument replacement.
//
// "{0} is dead, but {1} is alive! {0} {2}".sformat("ASP", "ASP.NET")
// Output: "ASP is dead, but ASP.NET is alive! ASP {2}"
//
if (!String.prototype.sformat) {
	String.prototype.sformat = function() {
		const args = arguments;
		return this.replace(/{(\d+)}/g, (match, number) => {
			return typeof args[number] !== 'undefined' ? args[number] : match;
		});
	};
}

if (!String.prototype.present) {
	String.prototype.present = function() {
		return this && typeof this != 'undefined' && this.length > 0;
	};
}

if (!String.prototype.starts) {
	String.prototype.starts = function(text) {
		return this.toLowerCase().search(text.toLowerCase()) > -1;
	};
}