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Grouping functions (tapply, by, aggregate) and the *apply family
Whenever I want to do something "map"py in R, I usually try to use a function in the apply family.
10 Answers
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What are App Domains in Facebook Apps?
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the app domain is your domain name.
Before you enter your domain, first click on Add Platform, select website, enter your site URL and mobile site url. Save the settings.
Thereafter, you can enter the domain name in the App domains field.
See more at m...
Jump to editor shortcut in Intellij IDEA
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Exactly what @Ven said. Some tool windows only respond to Shift-Escape, which works but hides the tool window.
– spieden
Feb 6 '14 at 2:00
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Is there any difference between “!=” and “” in Oracle Sql?
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No there is no difference at all in functionality.
(The same is true for all other DBMS - most of them support both styles):
Here is the current SQL reference: https://docs.oracle.com/database/121/SQLRF/conditions002.htm#CJAGAABC
The SQL standard only defines a single operator for...
Print Var in JsFiddle
How would I print something to the result screen in JsFiddle from my JavaScript. I can't use document.write() , it doesn't allow it, neither print .
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Query to list all stored procedures
What query can return the names of all the stored procedures in a SQL Server database
23 Answers
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Markdown open a new window link [duplicate]
...the whole set of shorthand. This is particularly important if you expect someone else to read your code later.
– justis
Feb 20 '12 at 2:33
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www-data permissions?
...having to use sudo). I'm afraid to change the permissions to 777 in case some other user on my machine (or a hacker) attempts to modify files in that directory. How do I only allow access for myself and Apache's www-data?
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What is the Sign Off feature in Git for?
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Sign-off is a requirement for getting patches into the Linux kernel and a few other projects, but most projects don't actually use it.
It was introduced in the wake of the SCO lawsuit, (and other accusations of copyright infringement from SCO, m...