parentheses

Is there a difference in writing: throw SomeException; and throw(SomeException); I have seen some sources that claim the latter (with parentheses) is not a good option for some reason but alas I can not recall where I've seen this. iammilind There should not be any functionality difference between the two expressions apart from the parentheses. I have never heard of any clear reason that says why one should be superior to the other. To me the first option looks more intuitive as it does not include the unnecessary parentheses! Also as @Pubby said in the comment, one should not confuse with the

Possible Duplicate: C++ Comma Operator I came across unexpected (to me at least) C++ behavior today, shown by the following snippit: #include <iostream> int main() { std::cout << ("1", "2") << std::endl; return 0; } Output: 2 This works with any number of strings between the parentheses. Tested on the visual studio 2010 compiler as well as on codepad. I'm wondering why this compiles in the first place, what is the use of this 'feature'? Ahh, this is the comma operator. When you use a comma and two (or more) expressions, what happens is that all expressions are executed, and the result as a

The below JSF snippet: <p:dataTable value="#{userbean.getAll()}" var="user"> Throws this exception: Encountered "(" at line 1, column 18. Was expecting one of: "}" ... "." ... "[" ... ">" ... "gt" ... "<" ... "lt" ... ">=" ... "ge" ... "<=" ... "le" ... "==" ... "eq" ... "!=" ... "ne" ... "&&" ... "and" ... "||" ... "or" ... "*" ... "+" ... "-" ... "/" ... "div" ... "%" ... "mod" ... org.apache.el.parser.ParseException: Encountered "(" at line 1, column 18. Was expecting one of: "}" ... "." ... "[" ... ">" ... "gt" ... "<" ... "lt" ... ">=" ... "ge" ... "<=" ... "le" ... "==" ... "eq" ... "!="

When I have a string like this: s1 = 'stuff(remove_me)' I can easily remove the parentheses and the text within using # returns 'stuff' res1 = re.sub(r'\([^)]*\)', '', s1) as explained here . But I sometimes encounter nested expressions like this: s2 = 'stuff(remove(me))' When I run the command from above, I end up with 'stuff)' I also tried: re.sub('\(.*?\)', '', s2) which gives me the same output. How can I remove everything within the outer parentheses - including the parentheses themselves - so that I also end up with 'stuff' (which should work for arbitrarily complex expressions)? re

Is there a way to get indices of matching parentheses in a string? For example for this one: text = 'aaaa(bb()()ccc)dd' I'd like to get a dictionary with values: result = {4:14, 7:8, 9:10} which means that parentheses on index 4 and 14 are matching , 7 and 8 an so on. Thanks a lot. You mean an automated way? I don't think so. You need to create a program using a stack , in which you push the index when you find an open parenthesis, and pop it when you find a closing parenthesis. In Python, you can easily use a list as a stack , since they have the append() and pop() methods. def find_parens(s)

Recently i've read 'Databinding overview' article at MSDN and there is such sample code: <TextBox.ToolTip> <Binding RelativeSource="{RelativeSource Self}" Path="(Validation.Errors)[0].ErrorContent"/> </TextBox.ToolTip> I know that {} means markup extensions but what mean () parentheses here? It would be nice someone share link to explanation such syntax. Thanks! Path="(Validation.Errors)[0].ErrorContent" The () parentheses refer to Attached Properties. Binding to an Attached Property Quoting the MSDN library (I'm quoting MSDN here because I couldn't have written it down better): This syntax is