Is this what the fp community calls referential transparency?
Very similar, referential transparency is the ability to replace a function call (or expression, generally) with its result (or value). So using an array (or other tabling mechanism) you can take advantage of this to trade off space for time.
alt Hacker News
Very similar, referential transparency is the ability to replace a function call (or expression, generally) with its result (or value). So using an array (or other tabling mechanism) you can take advantage of this to trade off space for time.