Object Methods in JavaScript: Every JavaScript developer must know.

JSON Object are always a part of any system built. Below are object methods every JavaScript must know to process these JSON Objects.

Object.freeze
Object.freeze prevents any changes to the objects passed.

const data = {
  name: "Rhea",
  id: 1
}

Object.freeze(data)
data.id = 2;
console.log(data) // prints {name: "Rhea", id: 1}, value will not change.

Object.keys
Object.keys returns an array containing all the keys of the Object.

const data = {
  name: "Rhea",
  id: 1
}

console.log(Object.keys(data)) // prints Array [ "name", "id" ]

Object.values
Object.values returns an array containing all the values of the Object.

const data = {
  name: "Rhea",
  id: 1
}


console.log(Object.values(data)) // prints Array [ "Rhea", 1 ]

Object.entries
Object.entries returns both the keys and its values in the form of a nested array.

const data = {
  name: "Rhea",
  id: 1
}


console.log(Object.entries(data)) // prints Array [[ "name", "Rhea" ], ["id", 1 ]]

Object.assign
Object.assign is used for merging two objects as one.

const data = {
  name: "Rhea",
  id: 1
}

const meta = {
  favourite_color : "black"
}

const combined = Object.assign(data, meta)

console.log(combined) // { name: "Rhea", id: 1, favourite_color : "black"}

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