Code examples in WordPress

When writing word press articles and including example code with <code>, the leading spaces are discarded when the article is displayed and without indention code looks weird and unreadable. A way to bypass this is to transform tabs to spaces, and then replace all spaces by no-break-spaces (unicode 0x00A0). Then the indention remains intact. Direct […]

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Design Patterns: Singleton

Deutsch This Singleton Pattern has the advantage to be easy to memorize. The only really interesting aspect of it is the issue of initialization („lazy or „eager“) and maybe the dependencies between multiple singletons. But I would like to mention two generalizations. A Singleton exists once in the whole program. Generalizations can address the uniqueness […]

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Using Collections

When Java came out about 20 years, it was great to have a decent and quite extensive collection library available as part of the standard setup and ready to use. Before that we often had to develop our own or find one of many interesting collection libraries and when writing and using APIs it was […]

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Indexing of Database Tables II (additional indices)

Additional indices („indexes“ in Oracle’s English) apart from the primary key are extremely important for the performance of databases. There is this magic behind it, when a complicated query with multiple joins runs slowly and magically becomes faster when adding the right index and the right hint or does not become faster at all, even […]

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