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Ordering by specific field value first
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There's also the MySQL FIELD function.
If you want complete sorting for all possible values:
SELECT id, name, priority
FROM mytable
ORDER BY FIELD(name, "core", "board", "other")
If you only care that "core" is first and the other values don't matter:
SELECT i...
Determine the number of NA values in a column
... @user3274289: although you'll usually want na.rm=TRUE, because otherwise if df$col contains NAs, sum will return NA.
– jbaums
Jun 4 '14 at 2:30
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How to save an image to localStorage and display it on the next page?
...mg.src = "data:image/png;base64," + dataImage;
Tested it in quite a few different browsers and versions, and it seems to work quite well.
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Spring Data JPA find by embedded object property
...ies with a property of an embedded object in that entity. Does anyone know if this is possible, and if so how?
4 Answers
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Convert string to title case with JavaScript
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If the jim-bob --> Jim-Bob is your desire, you should probably do /\b\w+/g. Example: str.replace(/\b\w+/g,function(s){return s.charAt(0).toUpperCase() + s.substr(1).toLowerCase();});
– vol7ron
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REST HTTP status codes for failed validation or invalid duplicate
...application with a REST-based API and have come to the point where i'm specifying status codes for each requests.
9 Answers...
What's the valid way to include an image with no src?
...ources which won't cause server hits. I recently had a similar issue with iframes and determined //:0 to be the best option. No, really!
Starting with // (omitting the protocol) causes the protocol of the current page to be used, preventing "insecure content" warnings in HTTPS pages. Skipping th...
Is there any way to prevent input type=“number” getting negative values?
...Listen for input event on numInput.
number.onkeydown = function(e) {
if(!((e.keyCode > 95 && e.keyCode < 106)
|| (e.keyCode > 47 && e.keyCode < 58)
|| e.keyCode == 8)) {
return false;
}
}
<form action="" method="post">
<inp...
Set margin size when converting from Markdown to PDF with pandoc
...ext, I used pandoc to convert the .md file into a PDF file (I get an error if I try and convert from the .html file). However, the PDF that is produced have massive margins (like this http://johnmacfarlane.net/pandoc/demo/example13.pdf ). How can I get pandoc to produce something with smaller mar...
Data Modeling with Kafka? Topics and Partitions
... of consumer so in the example above, I would just have a single topic and if you´ll decide to push some other kind of data through Kafka, you can add a new topic for that later.
Topics are registered in ZooKeeper which means that you might run into issues if trying to add too many of them, e.g. t...