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What is Ruby's double-colon `::`?
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In C#, for instance, yes. On the other hand C++ (and Ruby) use :: for namespace resolution such as std::cout << "Hello World!";
– Jerry Fernholz
Jun 9 '10 at 20:29
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Android equivalent to NSNotificationCenter
In the process of porting an iPhone application over to android, I am looking for the best way to communicate within the app. Intents seem to be the way to go, is this the best (only) option? NSUserDefaults seems much lighter weight than Intents do in both performance and coding.
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Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
... projects on Eclipse, it's a J2EE application, made with Spring, Hibernate and so on. I'm using Tomcat 7 for this (no particular reason, I don't exploit any new feature, I just wanted to try that). Every time I debug my application, it happens that Eclipse debugger pops out like it has reached a bre...
What is the difference between JavaScript and ECMAScript?
What's the difference between ECMAScript and JavaScript? From what I've deduced, ECMAScript is the standard and JavaScript is the implementation. Is this correct?
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T-SQL get SELECTed value of stored procedure
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there are three ways you can use: the RETURN value, and OUTPUT parameter and a result set
ALSO, watch out if you use the pattern: SELECT @Variable=column FROM table ...
if there are multiple rows returned from the query, your @Variable will only contain the value from the l...
Remove Last Comma from a string
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This will remove the last comma and any whitespace after it:
str = str.replace(/,\s*$/, "");
It uses a regular expression:
The / mark the beginning and end of the regular expression
The , matches the comma
The \s means whitespace characters (space, tab...
How to use http.client in Node.js if there is basic authorization
...eld in the header.
It contains the authentication type Basic in this case and the username:password combination which gets encoded in Base64:
var username = 'Test';
var password = '123';
var auth = 'Basic ' + Buffer.from(username + ':' + password).toString('base64');
// new Buffer() is deprecated ...
Which @NotNull Java annotation should I use?
...make my code more readable as well as use tooling like IDE code inspection and/or static code analysis (FindBugs and Sonar) to avoid NullPointerExceptions. Many of the tools seem incompatible with each others' @NotNull / @NonNull / @Nonnull annotation and listing all of them in my code would be t...
Regex not operator
... In the edit of your question you put the {4} outside the lookahead and in this comment you put it inside: which one did you try? Also: if you want (20019) to match, then you must add the \) inside your lookahead: \((?![\d]{4}\))[0-9a-zA-z _\.\-:]+\)
– Joachim Sauer
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Cost of exception handlers in Python
...nt division or modulo by zero
So, as expected, not having any exception handler is slightly faster (but blows up in your face when the exception happens), and try/except is faster than an explicit if as long as the condition is not met.
But it's all within the same order of magnitude and unlikel...