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What is the result of % in Python?

What does the % in a calculation? I can't seem to work out what it does. 19 Answers ...
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Why use double indirection? or Why use pointers to pointers?

When should a double indirection be used in C? Can anyone explain with a example? 18 Answers ...
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Why is volatile needed in C?

Why is volatile needed in C? What is it used for? What will it do? 18 Answers 18 ...
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HashMap get/put complexity

We are used to saying that HashMap get/put operations are O(1). However it depends on the hash implementation. The default object hash is actually the internal address in the JVM heap. Are we sure it is good enough to claim that the get/put are O(1) ? ...
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How to determine if binary tree is balanced?

It's been a while from those school years. Got a job as IT specialist at a hospital. Trying to move to do some actual programming now. I'm working on binary trees now, and I was wondering what would be the best way to determine if the tree is height-balanced. ...
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Prefer composition over inheritance?

Why prefer composition over inheritance? What trade-offs are there for each approach? When should you choose inheritance over composition? ...
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Coding in Other (Spoken) Languages

This is something I've always wondered, and I can't find any mention of it anywhere online. When a shop from, say Japan, writes code, would I be able to read it in English? Or do languages, like C, PHP, anything, have Japanese translations that they write? ...
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JPA : How to convert a native query result set to POJO class collection

I am using JPA in my project. 21 Answers 21 ...
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Difference between attr_accessor and attr_accessible

In Rails, what is the difference between attr_accessor and attr_accessible ? From my understanding, using attr_accessor is used to create getter and setter methods for that variable, so that we can access the variable like Object.variable or Object.variable = some_value . ...
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Simplest way to detect a mobile device in PHP

What is the simplest way to tell if a user is using a mobile device to browse my site using PHP? 15 Answers ...