function checkData(){
	var arr = [{name: 'apple', value: 123}, {name: 'banana', value: 345}, {name: 'apple', value: 222}];
    for (var i=0; i<arr.length; i++) {
        for (var j=i+1; j<arr.length; j++) {
            if (arr[i].name == arr[j].name) {
                return false;
            }
        }
    }
}