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When is it right for a constructor to throw an exception?
When is it right for a constructor to throw an exception? (Or in the case of Objective C: when is it right for an init'er to return nil?)
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What to learn for making Java web applications in Java EE 6? [closed]
My goal is to make web applications!
7 Answers
7
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How to use a switch case 'or' in PHP
Is there a way of using an 'OR' operator or equivalent in a PHP switch?
10 Answers
10
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How can I determine if a date is between two dates in Java? [duplicate]
How can I check if a date is between two other dates, in the case where all three dates are represented by instances of java.util.Date ?
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SQL Server - stop or break execution of a SQL script
Is there a way to immediately stop execution of a SQL script in SQL server, like a "break" or "exit" command?
20 Answers
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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
I have a JPA-persisted object model that contains a many-to-one relationship: an Account has many Transactions . A Transaction has one Account .
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How to articulate the difference between asynchronous and parallel programming?
Many platforms promote asynchrony and parallelism as means for improving responsiveness. I understand the difference generally, but often find it difficult to articulate in my own mind, as well as for others.
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What is a postback?
...loper have to know about postbacks? (i.e. what are they and when do they arise?)
11 Answers
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Check if PHP session has already started
I have a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
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Get exit code of a background process
...itor, anyway.
4: wait <n> waits until the process with PID <n> is complete (it will block until the process completes, so you might not want to call this until you are sure the process is done), and then returns the exit code of the completed process.
2, 3: ps or ps | grep " $! " can tel...