First-class functions: Difference between revisions

Line 1,400:

<lang j> train =. (<'`:')(0:`)(,^:)&6 NB. Producing the function train corresponding to the functional `:6

inverse=. (<'^:')(0:`)(,^:)&_1 NB. Producing the function inverse corresponding to the functional ^:_1

at =. (<'@:')(0:`)(,^:) NB. Producing the function at corresponding to the functional @:

compose=. (<'@:')(0:`)(,^:) NB. Producing the function compose corresponding to the functional @:

an =. <@:((,'0') ; ]) NB. Producing the atomic representation of a noun

of =. train@:([ ; an) NB. Evaluating a function for an argument

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│1&o.^:_1│2&o.^:_1│^&3^:_1│

└────────┴────────┴───────┘

]BA=. B at &.> A NB. Producing the compositions of the functions and their inverses

]BA=. B compose &.> A NB. Producing the compositions of the functions and their inverses

┌────────────────┬────────────────┬──────────────┐

│1&o.^:_1@:(1&o.)│2&o.^:_1@:(2&o.)│^&3^:_1@:(^&3)│

└────────────────┴────────────────┴──────────────┘

BA of &> 0.5 NB. Evaluating the compositions at 0.5

0.5 0.5 0.5~~</lang>~~

0.5 0.5 0.5

</lang>

=={{header|Java}}==