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When to use the different log levels

...diagnostically helpful to people more than just developers (IT, sysadmins, etc.). Info - Generally useful information to log (service start/stop, configuration assumptions, etc). Info I want to always have available but usually don't care about under normal circumstances. This is my out-of-the-box c...
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@ variables in Ruby on Rails

...silent dup of variable, or making it 'const' so that it can't be modified, etc)? I'm coming from a C/C++ & Java perspective, and the really vague and optional syntax is driving me nuts! – Dan Devine Jun 13 '18 at 18:05 ...
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Grouping functions (tapply, by, aggregate) and the *apply family

...a function to the 1st elements of each, and then the 2nd elements of each, etc., coercing the result to a vector/array as in sapply. This is multivariate in the sense that your function must accept multiple arguments. #Sums the 1st elements, the 2nd elements, etc. mapply(sum, 1:5, 1:5, 1:5) [1] ...
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How Can I Browse/View The Values Stored in Redis [closed]

... when I use redsmin status I get error: Redsmin daemon is not running.. etc/log.log is 0 bytes. What's up? – Thomson Comer Jan 22 '14 at 3:41 ...
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ALTER TABLE without locking the table?

...ferably in a transaction. Once finished, recompile any stored procedures, etc that use that table. The execution plans will likely no longer be valid. EDIT: Some comments have been made about this limitation being a bit poor. So I thought I'd put a new perspective on it to show why it's how it ...
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What do the numbers in a version typically represent (i.e. v1.9.0.1)?

...0.1: 1: Major revision (new UI, lots of new features, conceptual change, etc.) 9: Minor revision (maybe a change to a search box, 1 feature added, collection of bug fixes) 0: Bug fix release 1: Build number (if used)—that's why you see the .NET framework using something like 2.0.4.2709 You won...
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What is the difference between 'E', 'T', and '?' for Java generics?

...ollow the same name constraints as class names, field names, method names, etc. E.g. Foo<hello_world> is valid. Using a single upper-case letter is a naming standard, which is recommended in the Java Language Specification: "Type variable names should be pithy (single character if possible) ye...
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What should go into an .h file?

...ared symbols, like functions, or definition of structures, classes, enums, etc., could need to be shared. Headers are used to put those shared details. Move to the header the declarations of what need to be shared between multiple sources Nothing more? In C++, there are some other things that co...
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Are there best practices for (Java) package organization? [closed]

...or example, my.project.util , my.project.factory , my.project.service , etc. 7 Answers ...
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What is the best practice for dealing with passwords in git repositories?

... share it with a bigger team of even with automatic tools (for deployment, etc) – blueFast May 23 '16 at 10:53 2 ...