Javascript return true if a value exists in a nested array [duplicate]

Question

I want to return true if a nested array contains a particular value

In this example I'm trying to see if the users array has the current users id but I get the object instead of true

var currentUserId ="MBsCLlPbilRr26Jpz5oxhMULRvC2"
var users = [
  {
    id: "MBsCLlPbilRr26Jpz5oxhMULRvC2",
    name: "Dennis",
    url: undefined,
  },
  {
    id: "CLlPbhMULRvC2jnjnDe",
    name: "Dennis",
    url: undefined,
  },
]
console.log(users.find(user=>user.id === currentUserId))

you want some() developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — epascarello
– epascarello, Commented Jul 2, 2019 at 14:22

user5880984 · Accepted Answer · 2019-07-02 14:23:46Z

1

The problem is you are using .find() instead of .some(). Try the following:

var currentUserId ="MBsCLlPbilRr26Jpz5oxhMULRvC2"
var users = [
  {
    id: "MBsCLlPbilRr26Jpz5oxhMULRvC2",
    name: "Dennis",
    url: undefined,
  },
  {
    id: "CLlPbhMULRvC2jnjnDe",
    name: "Dennis",
    url: undefined,
  },
]
console.log(users.some(user=>user.id === currentUserId))

The difference is in the output. .find() will return the value, .some() will return a boolean.

answered Jul 2, 2019 at 14:23

user5880984

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