Move element to first position in array

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);

You can use unshift method.

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" }, 
]

var stringToFilter = 'kjfdhg87';   //this holds 'kjfdhg87'
data.unshift(data.splice(data.findIndex(item => item.id === stringToFilter), 1)[0])
console.log(data);

Tags:

Javascript

Arrays

Sorting

Object

Json

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