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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
... INTO `usage`
(`thing_id`, `times_used`, `first_time_used`)
VALUES
(4815162342, 1, NOW())
ON DUPLICATE KEY UPDATE
`times_used` = `times_used` + 1
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Media Queries - In between two widths
I'm trying to use CSS3 media queries to make a class that only appears when the width is greater than 400px and less than 900px. I know this is probably extremely simple and I am missing something obvious, but I can't figure it out. What I have come up with is the below code, appreciate any help.
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Why isn't there a Guid.IsNullOrEmpty() method
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236
Guid is a value type, so a variable of type Guid can't be null to start with. If you want to kn...
How can I replace a regex substring match in Javascript?
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answered Aug 30 '10 at 5:53
AmarghoshAmarghosh
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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
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143
Yes, it's subassignment in R using <- (or = or ->) that makes a copy of the whole object. ...
django : using select_related and get_object_or_404 together
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.266...
What does the caret (‘^’) mean in C++/CLI?
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Rob WalkerRob Walker
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How do I convert a Ruby class name to a underscore-delimited symbol?
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143
Rails comes with a method called underscore that will allow you to transform CamelCased strings ...
Postgres manually alter sequence
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edited Oct 23 '18 at 20:43
Is Ma
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answered Jan 5 '12 ...
How to set up a git project to use an external repo submodule?
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346
You have a project -- call it MyWebApp that already has a github repo
You want to use the jqu...