Function that receives an array and a property, returns an array of property values

Asked Oct 10 '16 at 22:55

Active Oct 10 '16 at 22:55

Viewed 9 times

var pluck = function(inputArray, inputProperty){
   var tempString = ""
   var finalArray = []

   for(var i = 0; i < inputArray.length; i = i + 1){
        tempString = inputArray[i].inputProperty
        finalArray.push(tempString)
}
log(finalArray)
}

tempString on line five is returning null. Is my syntax incorrect?

asked Oct 10 '16 at 22:55

Nosrac777

1

It should be `inputArray[i][inputProperty]` – Barmar Oct 10 '16 at 22:56
Thank you! Can you explain why it needs brackets instead of a .? – Nosrac777 Oct 10 '16 at 22:58
Because when you use `.` it treats the property name literally, not as a variable. – Barmar Oct 10 '16 at 22:59
Because accessing like `inputArray.0."somevar"` is a TypeError, and accessing as `someobj.prop` treats `prop` as a literal property. Bracket notation is essentially the same as dot notation. – Andrew Li Oct 10 '16 at 22:59
Thanks again. This stumped me for a while. – Nosrac777 Oct 10 '16 at 22:59

Function that receives an array and a property, returns an array of property values

0 Answers0