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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
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191
Use INSERT ... ON DUPLICATE KEY UPDATE. For example:
INSERT INTO `usage`
(`thing_id`, `times_...
Add subdomain to localhost URL
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142
Unfortunately, because localhost is not a proper domain, you can't add a subdomain to it like ...
How to get thread id from a thread pool?
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answered Jul 20 '10 at 20:59
skaffmanskaffman
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How big should a UIBarButtonItem image be?
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As of iOS 11, the Human Interface Guidelines suggest glyphs be about 25×25 points in toolbars and navigation bars, up to a maximum of about 28 points. (And the HIG should definitely be in your bookmarks if you're working on iOS apps!)...
Nested rows with bootstrap grid system?
I want 1 larger image with 4 smaller images in a 2x2 format like this:
2 Answers
2
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Need a simple explanation of the inject method
I'm looking at this code but my brain is not registering how the number 10 can become the result. Would someone mind explaining what's happening here?
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How to change the default font size in ggplot2
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118
Use theme_set()
theme_set(theme_gray(base_size = 18))
qplot(1:10, 1:10)
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How to install a specific version of a ruby gem?
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1182
Use the -v flag:
$ gem install fog -v 1.8
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How to change the playing speed of videos in HTML5?
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211
According to this site, this is supported in the playbackRate and defaultPlaybackRate attribute...