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What makes a SQL statement sargable?
By definition (at least from what I've seen) sargable means that a query is capable of having the query engine optimize the execution plan that the query uses. I've tried looking up the answers, but there doesn't seem to be a lot on the subject matter. So the question is, what does or doesn't make...
What are the Ruby File.open modes and options?
Ruby's File.open takes modes and options as arguments. Where do I find a complete list of modes and options?
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How to write header row with csv.DictWriter?
Assume I have a csv.DictReader object and I want to write it out as a CSV file. How can I do this?
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How to get the parents of a merge commit in git?
Some git commands take the parent as a revision; others (such as git revert ), as a parent number. How to get the parents for both cases. I don’t want to use the graphical log command as that often requires scrolling down a long tree to find the second parent.
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How to customize a requirements.txt for multiple environments?
I have two branches, Development and Production. Each has dependencies, some of which are different. Development points to dependencies that are themselves in development. Likewise for Production. I need to deploy to Heroku which expects each branch's dependencies in a single file called 'requiremen...
How to make a great R reproducible example
When discussing performance with colleagues, teaching, sending a bug report or searching for guidance on mailing lists and here on Stack Overflow, a reproducible example is often asked and always helpful.
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When is an interface with a default method initialized?
While searching through the Java Language Specification to answer this question , I learned that
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Generate a UUID on iOS from Swift
In my iOS Swift app I want to generate random UUID ( GUID ) strings for use as a table key, and this snippet appears to work:
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In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
I'm trying to figure out how to reference another area of a page with Markdown. I can get it working if I add a
5 Answers
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Using --no-rdoc and --no-ri with bundler
When using gem install gem_name I can pass --no-rdoc and --no-ri switches to skip generating RDoc/RI documentation for the gem on install.
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