var data = [
    { id: "fmgbwe45", age: 24, gender: "male"   },
    { id: "kjregh23", age: 27, gender: "female" }, 
    { id: "kjfdhg87", age: 30, gender: "male" }, 
    { id: "lsdjfk43", age: 10, gender: "female" }, 
]
data.forEach(function(item,i){
  if(item.id === "kjfdhg87"){
    data.splice(i, 1);
    data.unshift(item);
  }
});