has

utility

Checks if an object contains a key

Syntax

has(container, key)

container (object)

The object to check

key (string)

The key to look for

boolean

True if the key exists, false otherwise

Check if object has a key

Input:

{name: "Alice"} | has("name")

Output:

true

Filter rows with email field

Input:

map(select(has("email")))

Output:

[{name: "Alice", email: "alice@example.com"}]

The has() function checks whether an object contains a specific key or property.

Use has() to validate the presence of fields before accessing them, or to filter data based on field existence.