Move element to first position in array

Question

I have an object like this:

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" }, 
]

I want to sort the object, this is my expected output:

var data = [
    { id: "kjfdhg87", age: 30, gender: "male" },  //only one record will match in my sort
    { id: "fmgbwe45", age: 24, gender: "male"   },
    { id: "kjregh23", age: 27, gender: "female" }, 
    { id: "lsdjfk43", age: 10, gender: "female" }, 
]

I have tried this:

$scope.sort_by = function (newSortingOrder) {
    var stringToFilter = newSortingOrder.toString();   //this holds 'kjfdhg87'
    var obj = data.sort(function(o) { return o.id - stringToFilter; });
    var finalObj = [obj];
    sortedData = finalObj;
    console.log(sortedData ); //sorting is not working as expected where im doing wrong.
}

Answer 1

Since you are just moving one item to the top, I will just use splice() and unshift() the item:

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);
  }
});

console.log(data);