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Python None comparison: should I use “is” or ==?
...n comparing arbitrary objects to singletons like None because it is faster and more predictable. is always compares by object identity, whereas what == will do depends on the exact type of the operands and even on their ordering.
This recommendation is supported by PEP 8, which explicitly states th...
Extracting .jar file with command line
...m trying to extract the files from a .jar file. How do I do that using command line?
8 Answers
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Jackson overcoming underscores in favor of camel-case
...e parsing from does not use a consistent format, i.e., uses both camelCase and underscore?
– DavidR
Nov 16 '15 at 23:45
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2D cross-platform game engine for Android and iOS? [closed]
I've worked for some time with Unity3d and found it's 2D part with OnGUI() or GUITextures too clumsy. Also, even a smallest game done on Unity3d is at least 10MB download which is just too much for a 2D game.
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JPA getSingleResult() or null
... doesn't exist or update it if it does. To enable this, I have to findByIdAndForeignKey , if it returned null insert if not then update. The problem is how do I check if it exists? So I tried getSingleResult . But it throws an exception if the
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Sort an array in Java
...o make a program that consists of an array of 10 integers which all has a random value, so far so good.
17 Answers
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Hibernate SessionFactory vs. JPA EntityManagerFactory
I am new to Hibernate and I'm not sure whether to use a Hibernate SessionFactory or a JPA EntityManagerFactory to create a Hibernate Session .
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Function overloading in Javascript - Best practices
...ent length or the types; checking the types will just make your code slow and you have the fun of Arrays, nulls, Objects, etc.
What most developers do is tack on an object as the last argument to their methods. This object can hold anything.
function foo(a, b, opts) {
// ...
if (opts['test'...
Algorithm to detect overlapping periods [duplicate]
...etect if two time periods are overlapping.
Every period has a start date and an end date.
I need to detect if my first time period (A) is overlapping with another one(B/C).
In my case, if the start of B is equal to the end of A, they are not overlapping(the inverse too)
I found the followi...
How to get one value at a time from a generator function in Python?
...thon 3.x
In Python >= 2.6, use next(gen). This is a built in function, and is clearer. It will also work in Python 3.
Both of these end up calling a specially named function, next(), which can be overridden by subclassing. In Python 3, however, this function has been renamed to __next__(), to b...