This is a valid question. Such a thing is possible in other languages. In C#, prefix the identifier with @ (as asked before); in Delphi, prefix with &. But Java offers no such feature (partly because it doesn’t really need to interact with identifiers defined by other languages the way the .Net world does).
What initially made this confusing for me is not understanding how the conventions for coding event handlers actually worked versus what was a named variable, combined with the implicit calls done by Javascript handlers when you set up event handlers like this: Good 1 document.getElementById(‘testId’).onkeypress = function(e) { console.log(e.which); } Above, your browser is passing … Read more
OK, this is completely undocumented, and I had to figure it out via trial and error, but it sets the line number for error reporting. For example: LINENO 25 SELECT * FROM NON_EXISTENT_TABLE The above will give you an error message, indicating an error at line 27 (instead of 3, if you convert the LINENO … Read more
User is a reserved keyword, so you must use square brackets to make it explicit that you mean the object named “User” it, i.e. use [User] instead of User.
The Problem In MySQL, certain words like SELECT, INSERT, DELETE etc. are reserved words. Since they have a special meaning, MySQL treats it as a syntax error whenever you use them as a table name, column name, or other kind of identifier – unless you surround the identifier with backticks. As noted in the official … Read more
Using type as a keyword argument to a function will mask the built-in function “type” within the scope of the function. So while doing so does not raise a SyntaxError, it is not considered good practice, and I would avoid doing so.
It won’t confuse the interpreter but it may confuse people reading your code. Unnecessary use of builtin names for attributes and methods should be avoided. Another ill-effect is that shadowing builtins confuses syntax highlighters in most python-aware editors (vi, emacs, pydev, idle, etc.) Also, some of the lint tools will warn about this practice.
In ECMAScript, starting from ES5, reserved words may be used as object property names “in the buff”. This means that they don’t need to be “clothed” in quotes when defining object literals, and they can be dereferenced (for accessing, assigning, and deleting) on objects without having to use square bracket indexing notation. That said, reserved … Read more
Keywords have a special meaning in a language, and are part of the syntax. Reserved words are words that cannot be used as identifiers (variables, functions, etc.), because they are reserved by the language. In practice most keywords are reserved words and vice versa. But because they’re two different things it may happen that a … Read more
user is a reserved word and it’s usually not a good idea use reserved words for identifiers (tables, columns). If you insist on doing that you have to put the table name in double quotes: create table “user” (…); But then you always need to use double quotes when referencing the table. Additionally the table … Read more