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Is rebooting a server idempotent or not?

The problem here is that Tim Bray doesn't explain why he thinks it's not idempotent. The concept of idempotency is somewhat subjective. When we call a PUT twice there are a number of things that ...
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If methods are actions that an object can perform, how do we represent abstract objects?

First, let's look at what "object-oriented" actually means. The very first object-oriented programming language was Simula (1960). As the name implies, it was designed for simulations. If ...

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