How to convert an array of key-value tuples into an object

Question

I have an array:

[ [ \'cardType\', \'iDEBIT\' ],
  [ \'txnAmount\', \'17.64\' ],
  [ \'txnId\', \'20181\' ],
  [ \'txnType\', \'Purchase\' ],
  [ \'txnDate\         


        

Answer 1

arr.reduce((o, [key, value]) => ({...o, [key]: value}), {})