how to delete/update a json object in javascript?

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Javascript

i have
myjson={"profile":[{"name":name1,"id":id1},{"name":name2,"id":id2},{"name":name3,"id":id3}]}


delete myjson.profile[1];

this will return
{"profile":[{"name":name1,"id":id1},null,{"name":name3,"id":id3}]}


however i need
{"profile":[{"name":name1,"id":id1},{"name":name3,"id":id3}]}


plz suggest something for it