Returns the sum of the hash of each element in the container.

isEmpty?

Returns true if the container size is 0.

Example:

[] isEmpty?
==> true[1] isEmpty?
==> false

contains?: block

Runs the given block against each container element. The block must take exactly one argument. If the block returns true then true is returned. False is returned if no block execution returns true.

Example:

a =[1,2,3]
a contains?: { <value> value < 2 }==>true
a contains?: { <value> value >100 }
==> false

find: block

Runs the given block against each container element. The block must take exactly one argument. If the block returns true, the element is returned.

Example:

a =[1,2,3]
a find: { <value> value == sqrt(4) }
==> 2