用Javascript对具有多个值的数组进行排序

Question

How do you sort an array like this fullnamearray.push(firstname +" "+ lastname); ?I want to sort it by lastname not firstname. The list should be displayed firstname followed by lastname.

code

 fullnamearray.push(firstname +" "+ lastname);
 fullnamearray.sort();
  for(var i = 0; i < fullnamearray.length; i++){
               Name.innerHTML += '<li>' + fullnamearray[i] + '</li>';
               }

Answer 1

Concatenate them when you output, not when you store:

fullnamearray.push([lastname, firstname]);
fullnamearray.sort();
for(var i = 0; i < fullnamearray.length; i++){
     Name.innerHTML += '<li>' + fullnamearray[i][1] + " " +  fullnamearray[i][0] + '</li>';
}

Answer 2

?I want to sort it by lastname not firstname. The list should be displayed firstname followed by lastname.

fullnamearray.sort( function(a,b){
  var lastNameA = a.split(" ")[1];
  var lastNameB = b.split(" ")[1];
  return lastNameA.localeCompare( lastNameB );
})

Now you can display the list in the same manner you were doing earlier.

Above method will fail if firstname or lastname has a space character in between, so maybe you can follow what @Thilo has suggested

fullnamearray.push({first: firstname, last: lastName});
fullnamearray.sort( function(a,b){
  var lastNameA = a.lastName;
  var lastNameB = b.lastName;
  return lastNameA.localeCompare( lastNameB );
});

and display list as

for(var i = 0; i < fullnamearray.length; i++){
    Name.innerHTML += '<li>' + fullnamearray[i].firstName + " " + fullnamearray[i].lastName '</li>';
}

Answer 3

Try this:

fullnamearray.push(firstname +" "+ lastname);
fullnamearray.sort(function (name1, name2) {
    return name1.split(' ')[1] > name1.split(' ')[1];
});