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How can a Java variable be different from itself?
...same with Double.NaN.
From JLS §15.21.1. Numerical Equality Operators == and !=:
Floating-point equality testing is performed in accordance with the rules of the IEEE 754 standard:
If either operand is NaN, then the result of == is false but the result of != is true.
Indeed, the test x!=x is tru...
Recursion or Iteration?
...gorithms to make them faster and more efficient. He also goes over how to convert a traditional loop into a recursive function and the benefits of using tail-end recursion. His closing words really summed up some of my key points I think:
"recursive programming gives the programmer a better w...
quick random row selection in Postgres
... that contains couple of millions of rows. I have checked on the internet and I found the following
7 Answers
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How to get next/previous record in MySQL?
Say I have records with IDs 3,4,7,9 and I want to be able to go from one to another by navigation via next/previous links. The problem is, that I don't know how to fetch record with nearest higher ID.
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Displaying a message in iOS which has the same functionality as Toast in Android
...to know if there is any method in iOS which behaves like Toast messages in Android. That is, I need to display a message which is dismissed automatically after few seconds. This is similar to the functionality of the Toast class in the Android environment.
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Pythonic way to find maximum value and its index in a list?
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@Sven-Marnach Would numpy be faster, if I had to convert my list to a numpy array first? Would it be faster for the simple example [0,1,0]?
– tommy.carstensen
Sep 8 '13 at 23:33
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Python Requests - No connection adapters
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@ChristianLong is there any way to convert a string to proper url? Like, can you tell me, what are you doing in your comment?
– Ravi Shankar Bharti
Aug 11 '18 at 11:50
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How is __eq__ handled in Python and in what order?
....x sees a == b, it tries the following.
If type(b) is a new-style class, and type(b) is a subclass of type(a), and type(b) has overridden __eq__, then the result is b.__eq__(a).
If type(a) has overridden __eq__ (that is, type(a).__eq__ isn't object.__eq__), then the result is a.__eq__(b).
If type(...
MySQL offset infinite rows
...d... but no! I've seen this 18446744073709551615 scatter all over the code and I was blaming lazy programmers, but it's a design feature!
– Petruza
May 24 '10 at 15:10
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Remove all values within one list from another list? [duplicate]
...ge(10))
y = x - set([2, 3, 7])
# y = set([0, 1, 4, 5, 6, 8, 9])
and then convert back to list, if needed.
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