any.md

any?

Returns true if at least one of the member of a collection returns something trueish for the given function. Returns false else.

any? [ 1, 2, 3 ]
  def elt
    (elt % 2) == 0
# yields `true` thanks to element `2`

any? { a: 'A', b: 'B', c: 'C' }
  def key, val \ val == 'B'
# yields `true` thanks to entry { b: 'B' }

without a function

It's OK to use "any?" without a function, it'll simply return false if the collection is empty, true else.

any? []          # yields false
any? [ 1 ]       # yields true
any? {}          # yields false
any? { a: 'A' }  # yields true

iterating and functions

Iterating functions accept 0 to 3 arguments when iterating over an array and 0 to 4 arguments when iterating over an object.

Those arguments are [ value, index, length ] for arrays. They are [ key, value, index, length ] for objects.

The corresponding key, val, idx and len variables are also set in the closure for the function call.

incoming ret array/object

If not fed an array or object directly, "any?" will pick it from the payload "ret" field.

[ 1, 2, 3 ]
any? _                    # yields true
any? (def elt \ elt == 3) # yields true
[]
any? _                    # yields false
any? (def elt \ elt == 3) # yields false

see also

Find, all?.

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