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Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
...lve the problem: Fibers, Webworkers and Threads (thread-a-gogo). Now which one to use is a confusion and one of them definitely needs to be used - afterall what's the purpose of having a server which is just good at IO and nothing else? Suggestions needed!
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Compile time string hashing
...might be possible to compute a string's hash at compile time. However, no one seems to be ready to come out and say that it will be possible or how it would be done.
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How to replace strings containing slashes with sed?
... to use a different delimiter in your search/replace lines, e.g.:
s:?page=one&:pageone:g
You can use any character as a delimiter that's not part of either string. Or, you could escape it with a backslash:
s/\//foo/
Which would replace / with foo. You'd want to use the escaped backslash in...
What is the use of a private static variable in Java?
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static is class level variable, which is common and only one copy exists for all instances of that class. The rule is applicable whether it is private or public. private just says I don't want out side world to corrupt my variable value (for non-final statics) . If a static is fina...
Multithreading: What is the point of more threads than cores?
...separate lines of execution at once. In an 'ideal' system, you would have one thread executing per core: no interruption. In reality this isn't the case. Even if you have four cores and four working threads, your process and it threads will constantly be being switched out for other processes and...
What is the difference between JOIN and UNION?
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Joins and Unions can be used to combine data from one or more tables. The difference lies in how the data is combined.
In simple terms, joins combine data into new columns. If two tables are joined together, then the data from the first table is shown in one set of column...
Why catch and rethrow an exception in C#?
...s where you might want to catch and rethrow an exception. Logging could be one of them:
try
{
// code that may throw exceptions
}
catch(Exception ex)
{
// add error logging here
throw;
}
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Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes
...ed up nothing, it's that my search turned up so many different solutions -none of which have worked.
14 Answers
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When NOT to use Cassandra?
...st fitting solution for that problem.
I will try to answer your questions one by one in the same order you asked them. Since Cassandra is based on the NoSQL family of databases, it's important you understand why use a NoSQL database before I answer your questions.
Why use NoSQL
In the case of RDB...
Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause?
Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT or ON UPDATE clause?
9 Answers
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