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Grouping functions (tapply, by, aggregate) and the *apply family
...a function to the 1st elements
of each, and then the 2nd elements of each, etc., coercing the result
to a vector/array as in sapply.
This is multivariate in the sense that your function must accept
multiple arguments.
#Sums the 1st elements, the 2nd elements, etc.
mapply(sum, 1:5, 1:5, 1:5)
[1] ...
What should go into an .h file?
...ared symbols, like functions, or definition of structures, classes, enums, etc., could need to be shared.
Headers are used to put those shared details.
Move to the header the declarations of what need to be shared between multiple sources
Nothing more?
In C++, there are some other things that co...
Single Page Application: advantages and disadvantages [closed]
...ld also
work with any updates in data like notifications, profile update etc
An alternate perspective: Aside from your website, will your project
involve a native mobile app? If yes, you are most likely going to be
feeding raw data to that native app from a server (ie JSON) and doing
cl...
Are there best practices for (Java) package organization? [closed]
...or example, my.project.util , my.project.factory , my.project.service , etc.
7 Answers
...
How do I uniquely identify computers visiting my web site?
... stuck.
Validation. You need to guard against spoofing, session hijacking, etc.
Even if there are ways to track a computer without using cookies there will always be a way to bypass it and software that will do this automatically. If you really need to track something based on a computer you will ...
Node.js: what is ENOSPC error and how to solve?
...d to avoid ENOSPC:
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
For Arch Linux add this line to /etc/sysctl.d/99-sysctl.conf:
fs.inotify.max_user_watches=524288
Then execute:
sysctl --system
This will also persist across reboots.
Technic...
Facebook Architecture [closed]
...ey use. How do they scale & what are the design decisions for what they do etc. Main underpinning being to learn. Knowing about sites which handles such massive traffic gives lots of pointers for architects etc. to keep in mind certain stuff while designing new sites. I am sharing what I found.
...
What is the best practice for dealing with passwords in git repositories?
... share it with a bigger team of even with automatic tools (for deployment, etc)
– blueFast
May 23 '16 at 10:53
2
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Building vs. Compiling (Java)
...s.
Compiling test sources.
Executing tests (unit tests, integration tests, etc).
Packaging (into jar, war, ejb-jar, ear).
Running health checks (static analyzers like Checkstyle, Findbugs, PMD, test coverage, etc).
Generating reports.
So as you can see, compiling is only a (small) part of the buil...
Open file via SSH and Sudo with Emacs
...name shorthand defined in an .ssh/config file. When I type /sudo:hostname:/etc/hosts, I get what you would expect, but when I type /sudo:abbrev:/etc/hosts, I get the message "Host abbrev looks like a remote host, sudo can only use the local host". Is this fixable?
– rogerl
...