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Is there (or was there ever) any non-trivial language that allows spaces in its variable names?
I am aware of the language Whitespace, but I'm interested in a language that was actually used for something besides demonstration.
I ask this out of pure curiosity.
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Specifically, spaces are not permitted in the variable names, as the variable name must be a single word. The variable name may not start with a digit or underscore, and may not end with an underscore. Double underscores are not permitted in the variable names. Hence the correct answer is White space characters.
Variable names are case sensitive. No spaces or special characters are allowed. You cannot use a C++ keyword (a reserved word) as a variable name.
You cannot use spaces in identifiers in Python. Spaces aren't legal in variable names. Use an underscore _ if you must.
Java has about 50 reserved words or keywords that you are not allowed to use as variable names such as public , class , static , void , int … Because a Java variable name can't have spaces, a style called camelCase is usually used for variable names with more than one word.
In a way, yes. Several languages's variable names are really just keys to a higher-level object. Both Coldfusion and Javascript come to mind. In Javascript, you can write foo=bar, but what you've really said is:
window['foo'] = bar;
You could just as easily write
window['i haz a name'] = bar;
The various scopes in Coldfusion can also be treated as either a (dict|hash|associative array) or a name.
Of course, once you've created a name with whitespace, it's harder to access without using the hash lookup syntax.
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TSQL will allow you to use whitespace in table and column names aslong as you have it between square braces [ ]
Theres a fantastic article on just what sql will let you get away with here http://www.sqlservercentral.com/blogs/philfactor/archive/2009/08/14/evil-code.aspx
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