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What is the Python equivalent of static variables inside a function?
...foo.counter += 1
print "Counter is %d" % foo.counter
foo.counter = 0
If you want the counter initialization code at the top instead of the bottom, you can create a decorator:
def static_vars(**kwargs):
def decorate(func):
for k in kwargs:
setattr(func, k, kwargs[k])
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How does one write code that best utilizes the CPU cache to improve performance?
... could sound like a subjective question, but what I am looking for are specific instances, which you could have encountered related to this.
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getActivity() returns null in Fragment function
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I didn't understand how you can solve your problem. If my getActivity() isn't stille ready, how can I get the reference of FragmentActivity object?
– CeccoCQ
Aug 8 '11 at 10:12
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how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
I need to show an alternate image in cell of table if source image is not found.
Currently below code is used to do so.
3 A...
Google Guava isNullOrEmpty for collections
...mpty" is a question you ever really want to be asking about a collection.
If a collection might be null, and null should be treated the same as empty, then get all that ambiguity out of the way up front, like this:
Set<Foo> foos = NaughtyClass.getFoos();
if (foos == null) {
foos = Immutabl...
Detect Retina Display
Does iOS SDK provides an easy way to check if the currentDevice has an high-resolution display (retina) ?
14 Answers
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...dards documents to be sure. For example, ISO C11 states (my emphasis):
If the value of argc is greater than zero, the string pointed to by argv[0] represents the program name; argv[0][0] shall be the null character if the program name is not available from the host environment.
So no, it's onl...
How do you remove an array element in a foreach loop?
I want to loop through an array with foreach to check if a value exists. If the value does exist, I want to delete the element which contains it.
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How to find all duplicate from a List? [duplicate]
... is not complete, that one is just the first step. Then he can use a Where if he wants just the duplicates, like list.GroupBy(x => x).Where(group => group.Count() > 1).Select(group => Group.Key).ToList()
– Giuseppe Ottaviano
Jan 2 '11 at 12:34
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Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
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If you're working with twitter bootstrap, or you want another example of what you can do in field_error_proc, checke out this awesome gist: gist.github.com/1464315
– Ryan Sandridge
Jun 2...