#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/javascript/arrays/the-findindex-method

░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░███████████████████████████████████████████████████████████████████

#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/javascript/arrays/the-findindex-method

Repovive

The findIndex Method - Arrays | JavaScript | Repovive

Repovive.

JavaScript22 sections · 783 units18h total

Open in Course

The findIndex Method

Finding position by condition

Get the index of the first matching element:

let users = [
  { id: 1, name: "Alice" },
  { id: 2, name: "Bob" }
]

let index = users.findIndex(u => u.id === 2)
console.log(index)  // 1

let notFound = users.findIndex(u => u.id === 99)
console.log(notFound)  // -1

findIndex() returns -1 when no match is found, just like indexOf().