Purely functional is a term in computing used to describe algorithms, data structures or programming languages that exclude destructive modifications (updates). According to this restriction, variables are used in a mathematical sense, with identifiers referring to immutable, persistent values.
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Famous quotes containing the words purely and/or functional:
“What’s past and what’s to come is strewed with husks
And formless ruin of oblivion;
But in this extant moment, faith and truth,
Strained purely from all hollow bias-drawing,
Bids thee, with most divine integrity,
From heart of very heart, great Hector, welcome!”
—William Shakespeare (1564–1616)
“Well designed, fully functional infant. Provides someone to live for as well as another mouth to feed. Produces cooing, gurgling and other adorable sounds. May cause similar behavior in nearby adults. Cries when hungry, sleepy or just because. Hand Wash with warm water and mild soap, then pat dry with soft cloth and talc. Internal mechanisms are self-cleaning... Two Genders: Male. Female. Five Colors: White. Black. Yellow. Red. Camouflage.”
—Alfred Gingold, U.S. humorist. Items From Our Catalogue, “Baby,” Avon Books (1982)