Information Processing Language: Difference between revisions

Revision as of 19:18, 1 July 2019

Revision as of 22:48, 7 January 2020

Line 76:

* Manipulation of symbols; e.g., test if a symbol denotes an integer, or make a symbol local.

* I/O operations

* "generators", which correspond to iterators and filters in functional programming. For example, a generator may accept a list of numbers and produce the list of their squares. Generators could accept suitably designed functions – strictlyfunctions—strictly, the addresses of code of suitably designed functions – asfunctions—as arguments.

== History ==

Line 89:

== Legacy to computer programming ==

IPL arguably introduced several programming language features:

* ''List manipulation'' – but—but only lists of atoms, not general lists

* ''Property lists'' – but—but only when attached to other lists

* ''Higher-order functions'' – except—except that assembly programming has always been able to compute with addresses of functions to call; IPL was an early attempt to generalize this property of assembly language and in a principled way

* ''Computation with symbols'' – except—except that the symbols are letter+number, not full words

* ''Virtual machine''