racket definitions video 1/4 --- domesticate values
Channel: Danny Heap
Date: 2012-07-26

Video from http://www.cdf.toronto.edu/~heap/racket_lectures on how to domesticate values --- images, numbers, strings --- so that they'll come when they're called.  You do this by defining an identifier to stand for the value.  Since identifiers can be defined in terms of other, already-defined, identifiers, it helps to use DrRacket's stepper to understand how it works.  See more:

www.cdf.toronto.edu/~heap/Racket/definitions.html    See also
www.cdf.toronto.edu/~heap/racket_lectures.html