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JavaScript

olu adesina
olu adesina
23,007 Points
Posted by olu adesina
olu adesina
23,007 Points

can i use a for in loop with in a for loop

var students =[

  {name:'Olu Adesina',
  track:'javaScript',
  achievements:'loops,objects',
  points:1568},

  {name:'Olu Adesina',
  track:'javaScript',
  achievements:'loops,objects',
  points:1568},

  {name:'Olu Adesina',
  track:'html',
  achievements:'loops,objects',
  points:1568},

  {name:'Olu Adesina',
  track:'javaScript',
  achievements:'loops,objects',
  points:1568},

  {name:'jack Adesina',
  track:'javaScript',
  achievements:'loops,objects',
  points:1568},


]
  var message;

  for(x=0;x<students.length;x+=1){
      for(var name in[x]){
      message+= name, ':',[x][name]     
  }
}

  document.write(message)
Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

This question appears to be a duplicate of this other one.

Note to staff/moderators: I'm fine with it being deleted along with my answer.

1 Answer

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

Sure you can.

But I don't think your inner loop is properly formed. And if I understand what you're intending to do here, you probably meant to write something like this:

for (x = 0; x < students.length; x += 1) {
  for (var name in students[x]) {
    message += name + ": " + students[x][name] + "<br>";
  }
  message += "<br>";
}

Also, since you want to append to it, when you declare message you should initialize it with an empty string.

olu adesina
olu adesina
23,007 Points
olu adesina
olu adesina
23,007 Points

why is 'undefinedname: Olu Adesina' coming up on the first line when i run this code

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

You must have overlooked my hint about initializing message when you declare it:

  var message = "";