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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Higher-order-functions/REXX/higher-order-functions.rexx Normal file
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/*REXX program demonstrates the passing of a name of a function to another function. */
call function 'fact' , 6; say right( 'fact{'$"} = ", 30) result
call function 'square' , 13; say right( 'square{'$"} = ", 30) result
call function 'cube' , 3; say right( 'cube{'$"} = ", 30) result
call function 'reverse', 721; say right( 'reverse{'$"} = ", 30) result
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
cube: return $**3
fact: procedure expose $; !=1; do j=2 to $; !=!*j; end; return !
function: arg ?.; parse arg ,$; signal value (?.)
reverse: return 'REVERSE'($)
square: return $**2