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“Insert if not exists” statement in SQLite
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If you have a table called memos that has two columns id and text you should be able to do like this:
INSERT INTO memos(id,text)
SELECT 5, 'text to insert'
WHERE NOT EXISTS(SELECT 1 FROM memos WHERE id = 5 AND text = 'text to insert');
If a record already contains a row where ...
dplyr: “Error in n(): function should not be called directly”
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I presume you have dplyr and plyr loaded in the same session. dplyr is not plyr. ddply is not a function in the dplyr package.
Both dplyr and plyr have the functions summarise/summarize.
Look at the results of conflicts() to see masked objects.
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How do I get around type erasure on Scala? Or, why can't I get the type parameter of my collections?
... you instantiate a List[Int], you can verify that your instance is a List, and you can verify that any individual element of it is an Int, but not that it is a List[Int], as can be easily verified:
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jQuery UI Dialog with ASP.NET button postback
...over the dialog with the parent() method
– SammuelMiranda
Sep 11 '18 at 14:25
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Can I tell the Chrome script debugger to ignore jquery.js?
...ssible in Firefox
https://developer.mozilla.org/en-US/docs/Tools/Debugger
And in Chrome Canary using Experimental Dev tools.
http://www.divshot.com/blog/tips-and-tricks/ignoring-library-code-while-debugging-in-chrome/
Update. In Chrome v.75 there is a separabe tab for blackboxing.
Above works in ...
Git: How to reuse/retain commit messages after 'git reset'?
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When running "git commit" command, you've to check the following options,
To reuse,
--reuse-message=<commit>
To edit on reuse,
--reedit-message=<commit>
To change the author,
--reset-author
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Show an image preview before upload
...at let the user interact with files locally; That means you can load files and render them in the browser without actually having to upload the files. Part of the File API is the FileReader interface which lets web applications asynchronously read the contents of files .
Here's a quick example that...
Get User's Current Location / Coordinates
How can I store the user's current location and also show the location on a map?
15 Answers
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Using Tint color on UIImageView
I have my own subclass of UIButton . I add UIImageView on it and add an image. I would like to paint it over the image with a tint color but it doesn't work.
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parsing JSONP $http.jsonp() response in angular.js
...uccess/error were deprecated.
The $http legacy promise methods success and error have been deprecated and will be removed in v1.6.0. Use the standard then method instead. If $httpProvider.useLegacyPromiseExtensions is set to false then these methods will throw $http/legacy error.
USE:
var url...