Error: Key could not be imported


Do you ever face key could not be imported error during a pacman / yaourt update?
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Protected: Prevent concurrent execution using file locking

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MySQL Profiling

If we ever wondered what’s the performance of a MySQL query and a SELECT query be more efficient (and hence faster)?

MySQL has an embedded profiling feature that we can use from stock MySQL.

To enable it, it’s pretty simple:

mysql> SET profiling = 1;
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2014 StanDesk 2200

2014 StanDesk 2200

A blatant rip-off of StanDesk 2200, with a twist of a lower budget.

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Hash#each vs. Hash#each_pair

Sometimes I find each and each_pair kind of confusing. Though Ruby’s API Doc has been one of the most well documented API Doc, it is not very helpful in showing the difference between each and each_pair.

Peeps from gave an excellent explanation:

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