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mysql - how many columns is too many?
...s nothing to do with my point: large number of columns in a table does NOT mean table is denormalized. Think real estate contracts / purchase orders / other financial documents just to name a few examples. Can they be further split up into multiple tables? Yes. Any reason to do so? Not really.
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Importing data from a JSON file into R
..."startPrice" "lastVote.timestamp" "lastVote.user.name" "lastVote.user.user_id"
> winners[,c("winner","startPrice","lastVote.user.name")]
winner startPrice lastVote.user.name
1 68694999 0 Lamur
> winners[,c("votes")]
[[1]]
ts user.name user....
What is the difference between application server and web server?
... of the application servers have Web Server as integral part of them, that means App Server can do whatever Web Server is capable of. Additionally App Server have components and features to support Application level services such as Connection Pooling, Object Pooling, Transaction Support, Messaging ...
How to pass parameters on onChange of html select
... show one combobox-A, which is an HTML <select> with its selected id and contents at the other place on onChange().
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Automate ssh-keygen -t rsa so it does not ask for a passphrase
...being prompted for a passphrase you can do the following:
$ ssh-keygen -f id_rsa -t rsa -N ''
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Greedy vs. Reluctant vs. Possessive Quantifiers
... @Anomie a little bit late but, in the possessive part, I think you meant So it starts out with .*+ (notice the "+")
– R.D.
Apr 29 '14 at 17:51
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Best way to alphanumeric check in JavaScript
... The answer that makes you think and makes you understand what it means "programming". I use your way of thinking, in my answer
– Oscar Zarrus
Nov 20 '18 at 1:16
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SQL Group By with an Order By
...as the aggregate in the SELECT list, and order by the alias:
SELECT COUNT(id) AS theCount, `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY theCount DESC
LIMIT 20
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smart pointers (boost) explained
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no ownership at all
transfer of ownership
share of ownership
The first means that a smart pointer cannot delete the object, because it doesn't own it. The second means that only one smart pointer can ever point to the same object at the same time. If the smart pointer is to be returned from func...
WebView and HTML5
... our websites... Pretty simple with the WebViewClient . until I hit the video.
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