What is a foo variable?
Foo (pronounced FOO) is a term used by programmers as a placeholder for a value that can change, depending on conditions or on information passed to the program. Foo and other words like it are formally known as metasyntactic variables.
Why is foo used in programming examples?
foo is used as a place-holder name, usually in example code to signify that the object being named, or the choice of name, is not part of the crux of the example. foo is often followed by bar , baz , and even bundy , if more than one such name is needed. Wikipedia calls these names Metasyntactic Variables.
Is foo a bad word?
(slang) Fool, foolish person. Often used with “bar” to create “foobar,” which is a variation of FUBAR. FUBAR came out of World War II and means “F***ed Up Beyond All Recognition.”
What is foo Javascript?
foo is an object of some kind, which you must have declared before using it. bar is the name of a function that is a member of the foo object. A simple example, var foo = { bar: function () { alert(“Hello, World!” ); } }; // This displays an alert with the text “Hello, World!” foo.bar();
What is Python foo bar?
Foo, bar, and baz are used as placeholders when giving examples in programming. It’s like placeholder names that refer to objects or people when telling a story. Such as “widget” or “John Doe”. Programmers usually start with foo if only one placeholder name is needed. Then they will use bar, and finally baz.
Whats the meaning of foo?
(slang) Fool, foolish person. noun. 20. 8. (slang) Alternative spelling of foo (short form of fool)
What Foo mean?
(slang) Fool, foolish person. noun. 19. 8. A popular name for a temporary file, function or variable, or an example of same in documentation.
What is foo in Objective C?
The statement: @synthesize foo = foo_; instructs the compiler to write the setter & getter but to use the variable foo_ as the backing variable. So the difference is that foo is the name of a property and used either in dot notation ( myClassInstance.
Which is an example of a metasyntactic variable?
metasyntactic variable. A name given by a programmer to a file or function that is a temporary example. Names such as “foo,” “thud,” “blarg,” “bongo,” “foogle” and many others are used.
Can a metasyntactic variable be called a scratchfile?
The word foois the canonicalexample. To avoid confusion, hackers never (well, hardly ever) use ‘foo’ or other words like it as permanent names for anything. In filenames, a common convention is that any filename beginning with a metasyntactic-variable name is a scratchfile that may be deleted at any time.
Can a metasyntactic variable be deleted at any time?
In filenames, a common convention is that any filename beginning with a metasyntactic-variable name is a scratchfile that may be deleted at any time. To some extent, the list of one’s preferred metasyntactic variables is a cultural signature. They occur both in series (used for related groups of variables or objects) and as singletons.
What does the word foo stand for in metasyntax?
Strictly, a variableused in metasyntax, but often used for any name used in examples and understood to stand for whatever thing is under discussion, or any random member of a class of things under discussion. The word foois the canonicalexample.
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