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How to design a multi-user ajax web application to be concurrently safe
...your webservers, database & caching hardware, # of user, # of objects, etc. Not an easy decision to make.
For each atomic artifact have:
an application-wide unique-id
an incrementing version-id
a locking mechanism for write-access (mutex maybe)
a small history or "changelog" inside a ringbuffe...
Greenlet Vs. Threads
...to concurrency are usually projects like Twisted, libevent, libuv, node.js etc, where all your code shares the same execution context, and register event handlers.
It's an excellent idea to use greenlets (with appropriate networking support such as through gevent) for writing a proxy, as your handl...
Many-to-many relationship with the same model in rails?
...using options to has_and_belongs_to_many such as :finder_sql, :delete_sql, etc. It's not pretty. (I'm open to suggestions here too. Anyone?)
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How do I recover/resynchronise after someone pushes a rebase or a reset to a published branch?
... heard that one should never rebase published work, that it’s dangerous, etc. However, I have not seen any recipes posted for how to deal with the situation in case a rebase is published.
...
Angular JS: What is the need of the directive’s link function when we already had directive’s contro
...directive. For eg: attaching events, mutating the template based on scope, etc.
Finally, the controller is meant to be available to be live and reactive while the directive works on the DOM (after getting attached). Therefore:
(1) After setting up the view[V] (i.e. template) with link. $scope is ou...
How does this giant regex work?
...K+KBi4PJfDd3nkDXbqxhhrKVIZMLyGDMuRm5MCd+xKCD0b8qvIopmNkCLWFkulPJPMaEa4xP1+PEtcFZmph0aLeRVUa7VoOzWRSQu6k9bakdGw4R2zpdZ6XOmVnTx0zD63k39xezgoo5HC8TyezWHw1+gEsibMddu2vbVSLg+Ei/D12bu3bduqwaapX+jgYqoQK+gecxFexBcX9kXdqqC3C0j2vDrY5jJ2DfEuF/uF2MFheDwu6qPUpibb6uTBQ2pm/QtJJVzek/2R7IdQWse0os2PcLuszdhXYR4Nm/CtO+...
java.sql.SQLException: - ORA-01000: maximum open cursors exceeded
...lar, never hold JDBC objects (Connections, ResultSets, PreparedStatements, etc) over different remote invocations - let the Application Server manage this. The Application Server not only provides a connection pool, it also caches your PreparedStatements.
Eliminating leaks
There are a number of p...
How are people unit testing with Entity Framework 6, should you bother?
...ontext and various async extensions (ToListAsync(), FirstOrDefaultAsync(), etc.) have result in frustration for me.
– Kevin Burton
Mar 9 at 19:08
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Undefined behavior and sequence points
...use of Rule no 2
Example 2:
a[i] = i++ // or a[++i] = i or a[i++] = ++i etc
is disallowed because one of the accesses of i (the one in a[i]) has nothing to do with the value which ends up being stored in i (which happens over in i++), and so there's no good way to define--either for our underst...
How is Node.js inherently faster when it still relies on Threads internally?
...s needs lesser threads which reduces context switching, memory consumption etc.
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