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JavaScript

var jsonList = [{"region":"NCA","depprt":"Havana, Cuba"},{"region":"NCA","depprt":"Havana, Cuba"},{"region":"NCA","depprt":"Montego Bay, Jamaica"},{"region":"NCwA","depprt":"Montego Bay, Jamaica"}]

 var obj= [];
    for (i in jsonList) {
      if (jsonList[i].region == "NCA") { obj.push(jsonList[i])};
    }
console.log(obj);