how to return true/false from nested jquery callback functions

how to return true/false from nested jquery callback functions

I am trying to validate elements inside a javascript function which
contains two jQuery callback loops. Based on the conditions I want to
return true/false from the inner jQuery loop and that should be sent back
to the calling method of javascript. If the result of the inner loop is
true the loop should stop running.
if(validate(key)){
}
else{
}
function validate(key) {
$jquery.each(function(){
$jquery.each(function(){
if(){
return true;
}
else{
return false}
})
})
}