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When to add what indexes in a table in Rails
I have a question about Rails database.
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Is GridFS fast and reliable enough for production?
...art of the file.
Modifying the file may affect all chunks and increase database load
If your file system is growing up, you will have to decide to shard the gridfs. Be careful! Consistence is not guaranteed when sharding is initializing!
If you think about read loaded project - consider loading th...
Hg: How to do a rebase like git's rebase
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VonC has the answer you're looking for, the Rebase Extension. It is, however, worth spending a second or two thinking about why neither mq nor rebase are enabled by default in mercurial: because mercurial is all about indelible changesets. When I work in the manner you...
Configuring Log4j Loggers Programmatically
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Is it safe to remove selected keys from map within a range loop?
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How to swap files between windows in VIM?
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What are the differences between Clojure, Scheme/Racket and Common Lisp?
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Comparing Java enum members: == or equals()?
...early a better choice. If you want null safety (because you work on a code base which wasn't written so as to minimize the use of nulls), there's the Apache ObjectUtils or Guava's Objects#equal (or you can roll your own). I won't even mention the word "performance" for fear that someone rightfully s...
SQL Server indexes - ascending or descending, what difference does it make?
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How do pointer to pointers work in C?
... ***cpp = &cp;
Now cpp stores the address of cp. So it has value 55 (based on the example above), and you guessed it: it is itself stored at address 60.
As to why one uses pointers to pointers:
The name of an array usually yields the address of its first element. So if the array contains ...