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Difference between static and shared libraries?
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Shared libraries are .so (or in Windows .dll, or in OS X .dylib) files. All the code relating to the library is in this file, and it is referenced by programs using it at run-time. A program using a shared library only makes reference to the code that...
Is jquery a javascript library or framework? [closed]
Here, jquery is mentioned under framework category:
http://en.wikipedia.org/wiki/Comparison_of_JavaScript_frameworks
7 Ans...
How to check for an undefined or null variable in JavaScript?
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You have to differentiate between cases:
Variables can be undefined or undeclared. You'll get an error if you access an undeclared variable in any context other than typeof.
if(typeof someUndeclaredVar == whatever) // works
if(someUndeclaredVar) // throws error
A variable that has been de...
Using a strategy pattern and a command pattern
Both design patterns encapsulate an algorithm and decouple implementation details from their calling classes. The only difference I can discern is that the Strategy pattern takes in parameters for execution, while the Command pattern doesn't.
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How to grep Git commit diffs or contents for a certain word?
In a Git code repository I want to list all commits that contain a certain word. I tried this
8 Answers
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How do I get the object if it exists, or None if it does not exist?
...odels.Manager, create a safe_get like the code above and use that manager for my models. That way you can write: SomeModel.objects.safe_get(foo='bar').
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What are the differences between Perl, Python, AWK and sed? [closed]
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In order of appearance, the languages are sed, awk, perl, python.
The sed program is a stream editor and is designed to apply the actions from a script to each line (or, more generally, to specified ranges of lines) of the inpu...
How using try catch for exception handling is best practice
...e maintaining my colleague's code from even someone who claims to be a senior developer, I often see the following code:
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java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has
...mon misunderstanding among starters is that they think that the call of a forward(), sendRedirect(), or sendError() would magically exit and "jump" out of the method block, hereby ignoring the remnant of the code. For example:
protected void doXxx() {
if (someCondition) {
sendRedirect();...
Looking to understand the iOS UIViewController lifecycle
Could you explain me the correct manner to manage the UIViewController lifecycle?
11 Answers
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