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Why are preprocessor macros evil and what are the alternatives?
...gers, you can't "see" what the macro translates to. So you don't actually know what is going on.
Replacement: Use enum or const T
For "function-like" macros, because the debugger works on a "per source line where you are" level, your macro will act like a single statement, no matter if it's one ...
How to check if object has any properties in JavaScript?
...ave any way to create non-enumerable properties.
However this has changed now with ECMAScript 5th Edition, and we are able to create non-enumerable, non-writable or non-deletable properties, so the above method can fail, e.g.:
var obj = {};
Object.defineProperty(obj, 'test', { value: 'testVal',
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XML serialization in Java? [closed]
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2008 Answer
The "Official" Java API for this is now JAXB - Java API for XML Binding. See Tutorial by Oracle. The reference implementation lives at http://jaxb.java.net/
2018 Update
Note that the Java EE and CORBA Modules are deprecated in SE in JDK9 and to be removed fro...
How to auto-indent code in the Atom editor?
...untu's default shortcut for lock screen, I'm mapping with ctrl-shift-] for now.
– vusan
May 2 '16 at 11:51
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How do you automatically set the focus to a textbox when a web page loads?
...vaScript when you don't want to support older browsers.
Edit 2: Firefox 4 now supports the autofocus attribute, just leaving IE without support.
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Inefficient jQuery usage warnings in PHPStorm IDE
I recently upgraded my version of PHPStorm IDE and it now warns me about inefficient jQuery usage.
3 Answers
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How do I create a namespace package in Python?
...introduces implicit namespace packages, see PEP 420.
This means there are now three types of object that can be created by an import foo:
A module represented by a foo.py file
A regular package, represented by a directory foo containing an __init__.py file
A namespace package, represented by one ...
Build error: You must add a reference to System.Runtime
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This issue crept into a MVC project targeting 4.52, no known PCL but many nuGet packages. I believe that uninstalling VS2013 triggered this but I do not know that as fact. Error only surfaced in Views that referenced X-PagedList. Adding reference to project web.config (not views...
Is there a goto statement in Java?
...Didn't you describe why it's reserved? It's a keyword, so it can't be used now; later goto could spring to life without causing problems. If it wasn't a reserved word, it could be used now to produce code (int goto = 2;) which would break if goto was introduced.
– user146043
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SQL UPDATE all values in a field with appended string CONCAT not working
...he column had a limited set of characters it would accept, changed it, and now the query works fine.
– Fresheyeball
Nov 9 '10 at 3:19
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