Simple flow control for multiple parallel async calls.
var done = waitresscount cb;
Waitress returns a function,
done, that will wait to be called
count times before executing the
cb passed into it.
var done = waitress3if err throw err;;done;done'oh noes'; // causes callback to be fired with an error conditiondonefalse; // also causes callback to be fired with an error condition
If done receives a second parameter, waitress will add that to an array, which will be the second parameter given to the callback, as long as it receives no errors.
The array will be built in the order the data is received, not the order done appears in your code.
var done = waitress3if err throw err;result === 'a' 'b' 'c';;donenull 'a';donenull 'b';donenull 'c';