kloudglue-alasql/utils/callback/cb2.js

Versatile SQL database for browser or node. Handles relational data and nested JSON (noSQL). Export to and import from Excel, localStorage or IndexedDB

var async = false;

function alasql(sql, params, cb) {
	var res;
	if(arguments.length < 3) {
		process(sql, params, function(data){
			res = data;
		});
		if(async) {
			throw Error('Use sync version');
		}
		return res;
	} else {
		process(sql, params, function(data) {
			cb(data);
			async = false;
		});
	};
};

function process(sql, params, cb) {
	if(sql == "sync") {
		cb(100);
	} else {
		async = true;
		setTimeout(function(){
			cb(200);
		},100);
	}
};

var res = alasql('async',[],function(data){
	console.log(1,data);
});
console.log(2,res);


var res = alasql('sync',[]);
console.log(3,res);

/*
var res = alasql('async',[]);
*/