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How to automatically install Ansible Galaxy roles?

All my Ansible playbooks/roles are checked in to my git repo. 8 Answers 8 ...
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Is a Java hashmap search really O(1)?

I've seen some interesting claims on SO re Java hashmaps and their O(1) lookup time. Can someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions. ...
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Need for predictable random generator

I'm a web-game developer and I got a problem with random numbers. Let's say that a player has 20% chance to get a critical hit with his sword. That means, 1 out of 5 hits should be critical. The problem is I got very bad real life results — sometimes players get 3 crits in 5 hits, sometimes none i...
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In a PHP project, what patterns exist to store, access and organize helper objects? [closed]

How do you organize and manage your helper objects like the database engine, user notification, error handling and so on in a PHP based, object oriented project? ...
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How to make git mark a deleted and a new file as a file move?

I've moved a file manually and then I've modified it. According to Git, it is a new file and a removed file. Is there any way to force Git into treating it as a file move? ...
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What is a “translation unit” in C++

I am reading at the time the "Effective C++" written by Meyers and came across the term "translation unit". 11 Answers ...
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Quickly create large file on a Windows system

In the same vein as Quickly create a large file on a Linux system , I'd like to quickly create a large file on a Windows system. By large I'm thinking 5 GB. The content doesn't matter. A built-in command or short batch file would be preferable, but I'll accept an application if there are no other...
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Quick-and-dirty way to ensure only one instance of a shell script is running at a time

What's a quick-and-dirty way to make sure that only one instance of a shell script is running at a given time? 40 Answers ...
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Difference between local and global indexes in DynamoDB

I'm curious about these two secondary indexes and differences between them. It is hard to imagine how this looks like. And I think, this will help more people than just me. ...
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Bash if [ false ] ; returns true

Been learning bash this week and ran into a snag. 6 Answers 6 ...