find

This function returns the value of the first element in the set that satisfies the callback function. Otherwise nil is returned unless an alternative return value is specified.

This function does not generate an event.

The return value when called on a set might be unpredictable since a set is not ordered.
set({name: 'Iris'}, {name: 'Cato'}).find(||true);
…will return {Iris} or {Cato}.

Function

set.find(callback, [alt])

Arguments

Argument Type Description
callback closure Closure to execute on each value until the closure evaluates to true.
alt any (optional) Alternative value which is returned if no item has passed the callback test.

Explanation of the callback argument:

Iterable Arguments Description
set thing, id Iterate over things in the set. Both thing and id are optional.

The alt argument will be lazy evaluated. Consider the following example:
elems.find(|e| (e.name == "foo"), items.pop());
Here, the item will only be popped, in case e with name foo is not found in elems.

Return value

The value of the first element in the set that satisfies the provided testing function; otherwise, nil or a specified alternative value is returned.

Example

This code shows an example using find():

users.find(|user| user.name.startswith('Jeroen'));

Example return value in JSON format

{
    "#": 16,
    "email": "jeroen@transceptor.technology",
    "name": "Jeroen van der Heijden"
}