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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...
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...
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...
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...
NSUserDefaults removeObjectForKey vs. setObject:nil
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Swift 3.0
The below answer is no longer the case when I tested this.
When set to nil the result is NSCFData being stored. Possibly an NSNull object reference, but I am not positive.
To completely remove a value for a key use...