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Test if a vector contains a given element
...x is which(v == b) or any other logical operator. In this case, the return from this would be 2. If v were c("b", "b", "c", "b", "d"), the return to which(v == b) would be 1, 2, 4.
– khtad
Jun 26 at 21:33
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Get the last item in an array
... anArray.pop();
Important : This returns the last element and removes it from the array
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Clojure: cons (seq) vs. conj (list)
...e operation (in this case it would probably reduce to 1 + 3 -- the 1 comes from linear traversal over the first element, the 3 comes from (next (cons 4 '(1 2 3)) being a PersistentList and thus Counted).
The intention behind the names is, I believe, that cons means to cons(truct a seq)1, whereas co...
How to add an image to a JPanel?
...e of Encapsulation. Just remember while programming, what should be hidden from the rest of the code, needs to be maintained that way, instead of being visible to everythingy in the code. Seems like it is one such thingy that comes with experience, as one learns each day. Any book can give a basic i...
Best way to clear a PHP array's values
...f you want something more powerful use unset since it also will clear $foo from the symbol table, if you need the array later on just instantiate it again.
unset($foo); // $foo is gone
$foo = array(); // $foo is here again
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jQuery .hasClass() vs .is()
... a preferred method of determining whether an element is assigned a class, from a performance standpoint?
4 Answers
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How to convert Set to String[]?
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From Java 7 we can use String[] GPXFILES1 = myset.toArray(new String[0]) and that's recommended. Update the answer. "Since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array versi...
How does this program work?
...ted to double, as the prototype of printf is int printf(const char*, ...), from 6.5.2.2/7,
The ellipsis notation in a function prototype declarator causes argument type conversion to stop after the last declared parameter. The default argument promotions are performed on trailing arguments.
an...
Why does sys.exit() not exit when called inside a thread in Python?
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What if I did want to exit the program
from the thread?
Apart from the method Deestan described you can call os._exit (notice the underscore). Before using it make sure that you understand that it does no cleanups (like calling __del__ or similar).
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Android - get children inside a View?
...vary based on how vertical/horizontal the view hierarchy is.
Cross-posted from: Android | Get all children elements of a ViewGroup
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