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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects The Build an Object Challenge, Part 2 Solution

Posted by Paul Costanza
Paul Costanza
5,018 Points

Different approach using the `for in` loop

https://w.trhou.se/hhkr8yw0ck

I used the for in loop inside of the for loop to list all of the properties and values. Then I used an if statement to differentiate student names(h2) and the other properties(p). Please let me know if I am able to shorten/clean my code up. Thank you!

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

Be aware that there will be some behavioral differences with this approach:

  • a missing property will be silently omitted (the video code will indicate "undefined")
  • an extra property will be included (the video code only prints the specific ones)
  • the order in which the properties are listed isn't guaranteed

And one obvious code reduction:

      if (prop === "name") {
        list += '<h2>Name: ' + students[i].name + '</h2>'
Paul Costanza
Paul Costanza
5,018 Points

Oh wow, thanks man! Much appreciated.

Mohamad Faiz Khairi Mohd Nazri
Mohamad Faiz Khairi Mohd Nazri
5,668 Points
Mohamad Faiz Khairi Mohd Nazri
Mohamad Faiz Khairi Mohd Nazri
5,668 Points

using '<h2>Name: ' instead of prop will make the code longer because we need to write else if for every prop name

My solution:

if (prop === 'name') {
  list += '<h2>' + prop + ': ' + students[i][prop] + '</h2>'
} else {
  list += '<p>' + prop + ': ' + students[i][prop] + '</p>'
}

The downside of it is the property name display on browser is not capitalize on the first letter