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What is PostgreSQL explain telling me exactly?
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The part I always found confusing is the startup cost vs total cost. I Google this every time I forget about it, which brings me back to here, which doesn't explain the difference, which is why I'm writing this answer. This is what I have gleaned from the Postgres EXPLAIN documentation, explain...
When to use a key/value store such as Redis instead/along side of a SQL database?
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I did a quick Google search with that tutorial site URL and came across this as a top hit - slideshare.net/dvirsky/introduction-to-redis-version-2
– Paul
Nov 19 '13 at 15:19
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Render HTML to an image
...n 74.0.3729.157 as of this response), it is actually easy:
"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" --headless --screenshot --window-size=256,256 --default-background-color=0 button.html
Explanation of the command:
you run Chrome from the command line (here shown for the M...
What does addChildViewController actually do?
...ou provide a list of the 'system events' that get received by the child? A Google search for iOS "system events" doesn't throw much up; it doesn't seem to be a term that Apple uses?
– Mark Amery
Jun 19 '13 at 13:53
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iOS开发如何提高 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...论坛和QQ群讨论质量相当低下，提的问题都是能通过简单Google获得的，这种社区一定要远离，以提高自己的沟通效率。
除了在国内的技术社区交流，建议读者可以去国外的stackoverflow：http://www.stackoverflow.com上提问或回答问题。
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How to handle a lost KeyStore password in Android?
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You can create a new jks file and ask google to let you sign your previous app with it
– Rahul Gaur
Aug 24 at 5:06
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Using NumberPicker Widget with Strings
...ethods aren't part of the public API - they aren't officially supported by google and they will probably change in the future - you use at your own risk.
– FunkTheMonk
Aug 13 '12 at 13:16
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Set margin size when converting from Markdown to PDF with pandoc
...s finding that the -V geometry:margin=1in option was having no effect. Via googling, I found somewhere (sorry lost the link) documentation saying that this option has no effect if using the default template. I just want to convert a one page markdown file to a PDF to send to someone as a flier. My ...
Getting the difference between two sets
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If you use Guava (former Google Collections) library there is a solution:
SetView<Number> difference = com.google.common.collect.Sets.difference(test2, test1);
The returned SetView is a Set, it is a live representation you can either make im...
When to use a “has_many :through” relation in Rails?
.... However, I am not getting it. I am reading Beginning Rails 3 and I tried Googling, but I am not able to understand.
3 An...