jquery each loop do on first code example

Example 1: jquery each

//Array
$.each( arr, function( index, value ){
    sum += value;
});

//Object
$.each( obj, function( key, value ) {
    sum += value;
});

Example 2: jq each loop

$( "div" ).each(function( index ) {
		//console.log( index )
	    modal_desc = $(this).length;
	    if(modal_desc > 20){
	    	//code
	    }
	});