JavaScript: Why am I getting "undefined" when trying to assign value from an array-CodePudding

I see this question has been asked many, many times. I apologize for posting another question about the same.

I am reading values from an excel file Sometimes the excel file headers are: LegistarID AgendaItem, Title Other times the excel headers are: File #, Agenda #, Title

LegistarID = File #
AgendaItem = Agenda #

I attempt to get the value assigned to a scope variable $scope.IsAgenda whether is coming from, AgendaItem, or Agenda # from the excel file.

I attempt to get the value assigned to a scope variable $scope.IsLegistar whether is coming from, LegistarID, or File # from the excel file.

When the code passes the assignment line using Agenda #:

$scope.IsAgenda = !row.hasOwnProperty("AgendaItem") ? String(row["Agenda #"]) : String(row["AgendaItem"]);

I end up with an "undefined" value for $scope.IsAgena, even though I can see there is a value.

Same exact for LegistarID.

Here is a screen shot:

Am I doing the syntax wrong? How do I have to read the value from the object?

Please any help is appreciated.

Thank you, Erasmo

CodePudding user response：

Instead of using hasOwnProperty, just check for the actual value. The first condition checks for all falsy values of javascript the second one is two ensure that 0 evaluates to true, assuming zero should should be true!

$scope.IsAgenda = !(row['AgendaItem'] || row['AgendaItem'] === 0) ? String(row["Agenda #"]) : String(row["AgendaItem"]);

CodePudding user response：

just try:

$scope.IsAgenda = row["AgendaItem"] == undefined ? String(row["Agenda #"]) : String(row["AgendaItem"]);