Tables with higher-order functions

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2 minutes, 36 seconds

Higher-order Functions - slide 30 : 34

Instead of explicit composition of td and tr elements we can use a mapping to apply tr to rows and td to elements

Expression

Value

(define rows 
  '(("This" "is" "first" "row")
   ("This" "is" "second" "row")
   ("This" "is" "third" "row")
   ("This" "is" "fourth" "row"))
)

(table 'border 5
 (gmap
   (compose tr (gmap td)) rows))

This	is	first	row
This	is	second	row
This	is	third	row
This	is	fourth	row

The last example illustrates that (gmap td) is a useful building block, which can be composed with other functions.

The last example depends on the fact that the HTML mirror functions accept lists of elements and attributes.