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What is an efficient way to implement a singleton pattern in Java? [closed]
... Java5.0 and later. But I would prefer not to use it because I think it is error prone.
It's easy to forget the volatile statement and difficult to understand why it is necessary. Without the volatile this code would not be thread safe anymore due to the double-checked locking antipattern. See more...
Casperjs/PhantomJs vs Selenium
...run the tests first using PhantomJS and then (assuming there is no serious error encountered) continue to execute the same tests thoroughly in a Selenium setup.
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How to set the prototype of a JavaScript object that has already been instantiated?
...ng a prototype with inadequate methods for the given object are programmer errors, not language faults and should not be a factor, and besides they can happen with Object.create just as well as with freely settable __proto__.
– user2451227
Jul 22 '14 at 11:44
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Given final block not properly padded
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Corrected (sorry copy paste error). Anyway, indeed your issue happens since you decrypt with a key which is not the same as the one used for encryption as explained by Paulo. This happens since the method annotated with @Before in junit is executed befo...
Object comparison in JavaScript [duplicate]
...another fiddle, jsfiddle.net/mendesjuan/uKtEy/1 Now the function throws an error if an object is cyclical, which is a shame because your original version did work for cyclical objects, as long as the two object were pointing to the same object jsfiddle.net/mendesjuan/uKtEy/2
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What's the difference between size_t and int in C++?
...o assume size_t is the same as unsigned int, which can lead to programming errors, particularly as 64-bit architectures become more prevalent.
Also, check Why size_t matters
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How to update SQLAlchemy row entry?
...db.session.commit()
#db.session.close()
except:
print('Error in def update_state')
Why use db.session.flush()? That's why >>> SQLAlchemy: What's the difference between flush() and commit()?
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Array.Copy vs Buffer.BlockCopy
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Completely agree. There's too much room for error with Buffer.BlockCopy. Keep it simple, and don't try to squeeze any juice out of your program until you know where the juice is (profiling).
– Stephen
Sep 7 '09 at 19:36
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Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
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I got Error: (1146) Table 'tablename' doesn't exist, hahahah, ironic
– Aminah Nuraini
Nov 3 '16 at 14:23
a...
Using do block vs braces {}
...s of code:
1.upto 3 do |x|
puts x
end
1.upto 3 { |x| puts x }
# SyntaxError: compile error
Second example only works when parentheses is used, 1.upto(3) { |x| puts x }
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