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Extracting the last n characters from a string in R
...r had been remade using stringi as a backend, so should work with NAs etc. now.
– m-dz
Jul 11 '16 at 10:09
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What do I have to do to get Core Data to automatically migrate models?
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I've now found out that this is quite simple - once you know where to look.
In my AppDelegate I set-up the NSPersistentStoreCoordinator - and you need to add some options to this to tell it to handle auto-migrate:
NSDictionary *...
Rails 3: Get Random Record
...-----+---------------+---------+---------+-------+------+-------+
we can now use only indexes and the primary key and do the job about 500 times faster!
UPDATE:
as pointed out by icantbecool in comments the above solution has a flaw if there are deleted records in the table.
A workaround in tha...
Favorite Django Tips & Features?
...s of ...', I am curious to hear about your favorite Django tips or lesser known but useful features you know of.
55 Answers...
Stop Chrome Caching My JS Files
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As of Chrome 61.0.3163.100, it seems that the option now lives under More Tools/Network Conditions. "Developer Tools" option no longer exists.
– justian17
Oct 17 '17 at 13:44
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I change the capitalization of a directory and Git doesn't seem to pick up on it
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for some reason it duplicated all the files, now I have both the original versions and the ones with capitalization changed...
– Salatiel
Apr 1 at 1:49
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Search all the occurrences of a string in the entire project in Android Studio
I've just started using Android Studio (IntelliJ), and I now look for the feature to find the occurrence of a string in any of the files in my project. For example: I want to find all the files that contain the string " .getUuid() "
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How to style a checkbox using CSS
... the display of the HTML checkbox. What has changed, however, is that it's now possible to hide the actual checkbox and replace it with a styled element of your own, using nothing but CSS. In particular, because CSS now has a widely supported :checked selector, you can make your replacement correctl...
Styling HTML email for Gmail
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They now do media queries too and fuller support for css styling. stackoverflow.com/questions/39759764/…
– crowmagnumb
Sep 30 '16 at 15:44
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How do I check that a number is float or integer?
...viding by 1:
function isInt(n) {
return n % 1 === 0;
}
If you don't know that the argument is a number you need two tests:
function isInt(n){
return Number(n) === n && n % 1 === 0;
}
function isFloat(n){
return Number(n) === n && n % 1 !== 0;
}
Update 2019
5 years a...