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JSON

Access JSON in JavaScript

Access Array

let myArray = [
  "Jason",
  "Doe",
  39,
  "M",
  70000,
  true
];
myArray[1] "Doe"
myArray[5] true
myArray[6] undefined

Access Array of Objects

let myArray = [
  {
    "name": "Jason",
    "last": "Doe",
    "age": 39,
    "gender": "M",
    "salary": 70000,
    "married": true
  },
  {
    "name": "Tom",
    "last": "Smith",
    "age": 42,
    "gender": "F",
    "salary": 80000,
    "married": true
  },
  {
    "name": "Amy",
    "last": "Burnquist",
    "age": 29,
    "gender": "F",
    "salary": 60000,
    "married": false
  }
];
myArray[0] {"name": "Jason", …}
myArray[1].name "Tom"
myArray[1][2] 42
myArray[3] undefined
myArray[3].gender TypeError: Cannot read…

Access Nested

let myObject = {
  "ref": {
    "name": 0,
    "last": 1,
    "age": 2,
    "gender": 3,
    "salary": 4,
    "married": 5
  },
  "jdoe": [
    "Jason",
    "Doe",
    39,
    "M",
    70000,
    true
  ],
  "jsmith": [
    "Tom",
    "Smith",
    42,
    "F",
    80000,
    true
  ]
};
myObject.ref.age 2
myObject["ref"]["age"] 2
myObject.jdoe ["Jason", "Doe", 39 …]
myObject.jsmith[3] "F"
myObject[1] undefined

Access Object

let myObject = {
  "name": "Jason",
  "last": "Doe",
  "age": 39,
  "gender": "M",
  "salary": 70000,
  "married": true
};
myObject.name "Jason"
myObject["name"] "Jason"
myObject.age 39
myObject.other undefined
myObject[0] undefined
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