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Foo

Foo je metasintaktična spremenljivka, ki se v računalništvu pogosto uporablja za abstraktno predstavitev podatkov in se lahko uporabi za predstavitev katerega koli dela zapletenega sestava ali ideje, npr. podatkov, spremenljivk, funkcij, ukazov. Foo se pogosto kombinira z metaskladenjskima spremenljivkama bar in foobar. Beseda foo sicer nima nobenega pomena in je le pogosto uporabljena logična reprezentacija, ki se uporablja podobno kot črki x in y v algebri.

Zgled (psevdokoda)

Predpostavimo dve funkciji: FOO in BAR
 FOO kliče funkcijo BAR 
 BAR vrne podatek BAZ

Kadar se sklicujemo na več kot eno abstraktno danost, se za drugo in tretjo danost uporabljajo izrazi bar in baz. Z drugimi besedami, izraz bar kaže na obstoj primarne danosti foo itd.

Zgled (Javanski program)

public class Main {
	
	public static String prva = "Foo"; //Spremenljivko prva nastavimo na Foo
	public static String druga = "Bar"; //Spremenljivko druga nastavimo na Bar
	
	public static void main(String[] args) {
		System.out.println(prva + druga); //Izpišemo spremenljivki prva in druga skupaj
	}
}

Sistem nam vrne

FooBar

Glej tudi

bar
foobar

Referenca

RFC 3092, “Etymology of ‘Foo’”

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