n8n LabIntermediate
Extract a Field from Every Object with map() in n8n
You need a simple list of emails from a users array to send a bulk notification.
Live Execution Simulator
Idle
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Incoming Data
⚙️
n8n Node
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Next Step
> Ready. Type your expression below and click "Check Answer" to run the node.
Incoming Payload / Data:
{
"users": [
{ "id": 1, "email": "[email protected]" },
{ "id": 2, "email": "[email protected]" }
]
}
$json.users.
⚙️ Your expression is executed against test data — any correct solution passes. +20 XP
✅ Solution & explanation
$json.users.map(u => u.email)
Output: ["[email protected]", "[email protected]"]
map() returns a new array with the result of the arrow function for each element. u => u.email takes each user and returns only its email. n8n also offers .pluck('email').💡 Pro tip: Join them into one string for an email field: $json.users.map(u => u.email).join(', ').
Also accepted: map(user => user.email), pluck('email')