How to map in observables

How-to Discussions
1

Hello everyone I am having observable which looks like this

 [{
id: 1,
name: john,
sport: [{
    sport1: soccer,
    sport2: basketball
}]
 },

  {
id: 2,
name: smith,
sport: [{
    sport1: vollyball,
    sport2: baseball
   }]
}]

How do I map each sport in the sport array and extract it out to add each of the sports to a new observable so observable should look like this :

 [{
    sport1: soccer,
	sport2: basketball,
	sport1: vollyball,
	sport2: baseball
 }]