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Obtaining a powerset of a set in Java
The powerset of {1, 2, 3} is:
26 Answers
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in a “using” block is a SqlConnection closed on return or exception?
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Yes
Yes.
Either way, when the using block is exited (either by successful completion or by error) it is closed.
Although I think it would be better to organize like this because it's a lot easier to see what is going to happen, even for the new maintenance programme...
What is a 'multi-part identifier' and why can't it be bound?
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A multipart identifier is any description of a field or table that contains multiple parts - for instance MyTable.SomeRow - if it can't be bound that means there's something wrong with it - either you've got a simple typo, or a confusion between ta...
Weak and strong property setter attributes in Objective-C
What is the difference between weak and strong property setter attributes in Objective-C?
5 Answers
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How to declare variable and use it in the same Oracle SQL script?
... are a several ways of declaring variables in SQL*Plus scripts.
The first is to use VAR, to declare a bind variable. The mechanism for assigning values to a VAR is with an EXEC call:
SQL> var name varchar2(20)
SQL> exec :name := 'SALES'
PL/SQL procedure successfully completed.
SQL> sel...
Understanding keystore, certificates and alias
Is the keystore the actual certificate, or is the alias the certificate?
1 Answer
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Is a Python list guaranteed to have its elements stay in the order they are inserted in?
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Yes, the order of elements in a python list is persistent.
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Is the order of elements in a JSON list preserved?
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Yes, the order of elements in JSON arrays is preserved. From RFC 7159 -The JavaScript Object Notation (JSON) Data Interchange Format
(emphasis mine):
An object is an unordered collection of zero or more name/value
pairs, where a name is a string and a value is...
Vertically align an image inside a div with responsive height
... container which has a height that changes with the width when the browser is re-sized (to maintain a square aspect ratio).
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if else in a list comprehension [duplicate]
I have a list l :
8 Answers
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