Semicolons after function declarations are not necessary. The grammar of a FunctionDeclaration is described in the specification as this: function Identifier ( FormalParameterListopt ) { FunctionBody } There’s no semicolon grammatically required, but might wonder why? Semicolons serve to separate statements from each other, and a FunctionDeclaration is not a statement. FunctionDeclarations are evaluated before … Read more
Below is my (current) favorite demonstration of why parsing C++ is (probably) Turing-complete, since it shows a program which is syntactically correct if and only if a given integer is prime. So I assert that C++ is neither context-free nor context-sensitive. If you allow arbitrary symbol sequences on both sides of any production, you produce … Read more
js2010’s helpful answer shows the correct solution: Because your command name/path contains a variable reference ($PROGPATH/…), you must invoke it with &. The same applies if a grouping expression, (…) is used, or a subexpression, $(…) is involved. Additionally, the same applies if a command name/path is quoted (‘…’ or “…”)[1], as is required if … Read more
You can use an eval to do it, though I try to avoid that sort of thing at all costs. alert(eval(someString)); A better way, if you find yourself needing to do this, is to use a hash table. var stuff = { myText: ‘hello world!’ }; var someString = ‘myText’; alert( stuff[someString] );
You’re looking at the object ID, not a dump of the contents. The [ means array. The B means byte. The @ separates the type from the ID. The hex digits are an object ID or hashcode. If the intent is to print the contents of the array, there are many ways. For example: byte[] … Read more
~ is the regular expression operator, and has the capabilities implied by that. You can specify a full range of regular expression wildcards and quantifiers; see the documentation for details. It is certainly more powerful than LIKE, and should be used when that power is needed, but they serve different purposes.
Peter Michaux discusses the difference in An Important Pair of Parens. Basically the parentheses are a convention to denote that an immediately invoked function expression is following, not a plain function. Especially if the function body is lengthy, this reduces surprises,
You seem to have stumbled upon the answer. Anyway, I’ll try to make it clear. You can omit dot when using the prefix, infix and postfix notations — the so called operator notation. While using the operator notation, and only then, you can omit the parenthesis if there is less than two parameters passed to … Read more
x = getattr(self, source) will work just perfectly if source names ANY attribute of self, including the other_data in your example.