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What is Gradle in Android Studio?
...e is a bit confusing to me, and also for any new Android developer. Can anyone explain what Gradle in Android Studio is and what its purpose is? Why is it included in Android Studio?
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Does Java SE 8 have Pairs or Tuples?
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The short answer is no. You either have to roll your own or bring in one of the several libraries that implements it.
Having a Pair class in Java SE was proposed and rejected at least once. See this discussion thread on one of the OpenJDK mailing lists. The tradeoffs are not obvious. On the o...
When are you truly forced to use UUID as part of the design?
...UID, the timestamp is incremented by 1. Collisions should not occur unless one of the following happens: The MAC address is spoofed; One machine running two different UUID generating applications produces UUIDs at the exact same moment; Two machines without a network card or without user level acces...
What is “Orthogonality”?
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From Eric S. Raymond's "Art of UNIX programming"
Orthogonality is one of the most important properties that can help make even complex designs compact. In a purely orthogonal design, operations do not have side effects; each action (whether it's an API call, a macro invocation, or a languag...
What is the memory consumption of an object in Java?
Is the memory space consumed by one object with 100 attributes the same as that of 100 objects, with one attribute each?
12...
What do 3 dots next to a parameter type mean in Java?
...ny of the following:
myMethod(); // Likely useless, but possible
myMethod("one", "two", "three");
myMethod("solo");
myMethod(new String[]{"a", "b", "c"});
Important Note: The argument(s) passed in this way is always an array - even if there's just one. Make sure you treat it that way in the method ...
Ruby capitalize every word first letter
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try this:
puts 'one TWO three foUR'.split.map(&:capitalize).join(' ')
#=> One Two Three Four
or
puts 'one TWO three foUR'.split.map(&:capitalize)*' '
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Which is faster: multiple single INSERTs or one multiple-row INSERT?
I am trying to optimize one part of my code that inserts data into MySQL. Should I chain INSERTs to make one huge multiple-row INSERT or are multiple separate INSERTs faster?
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How exactly does a generator comprehension work?
...king them into list, it waits, and yields each item out of the expression, one by one.
>>> my_list = [1, 3, 5, 9, 2, 6]
>>> filtered_list = [item for item in my_list if item > 3]
>>> print(filtered_list)
[5, 9, 6]
>>> len(filtered_list)
3
>>> # compar...
Start two instances of IntelliJ IDE
... how do I start two instances of IntelliJ (community edition).
When I have one instance started and I try to start another one, all that happens is that my started instance gets focus.
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