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Why does typeof NaN return 'number'?
...se "these values may not be the same" has no meaning, because those values do not exist.
– Dmitri Zaitsev
May 29 '16 at 18:15
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AsyncTask Android example
...as reading about AsyncTask , and I tried the simple program below. But it does not seem to work. How can I make it work?
2...
Get application version name using adb
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That does show me the package info but for some reason it is missing the version information for any package I have tried to look up on my tablet (android 2.2). On my phone all the version information is there (android 2.3).
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jQuery Validate Plugin - Trigger validation of single field
...heir name and email are automatically filled in. The problem is that this doesn't trigger the remote validation to check if the email already exists.
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What's the difference between including files with JSP include directive, JSP include action and usi
...ent in JSP
Pages.
This excerpt from the book "Pro JSP 2" also discuses why do you need
a Tag File instead of using static include:
Reusing Content with Tag
Files
Conclusion
Use the right tools for each task.
Use Tag Files as a quick and easy way of creating custom tags that can help you encap...
Collect successive pairs from a stream
...s provides a pairMap method for all stream types. For primitive streams it does not change the stream type, but can be used to make some calculations. Most common usage is to calculate differences:
int[] pairwiseDiffs = IntStreamEx.of(input).pairMap((a, b) -> (b-a)).toArray();
For object strea...
What is a Y-combinator? [closed]
...science concept from the “functional” side of things. Most programmers don't know much at all about combinators, if they've even heard about them.
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What is a “callable”?
... functions, methods etc.)
The method named __call__ is (according to the documentation)
Called when the instance is ''called'' as a function
Example
class Foo:
def __call__(self):
print 'called'
foo_instance = Foo()
foo_instance() #this is calling the __call__ method
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Should each and every table have a primary key?
I'm creating a database table and I don't have a logical primary key assigned to it. So, I'm thinking about leaving it without a primary key, but I'm feeling a bit guilty about it. Should I?
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Get all non-unique values (i.e.: duplicate/more than one occurrence) in an array
... array to see if there are any duplicate values. What's the easiest way to do this? I just need to find what the duplicated values are - I don't actually need their indexes or how many times they are duplicated.
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