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R data formats: RData, Rda, Rds etc
...Rda is just a short name for RData. You can just save(), load(), attach(), etc. just like you do with RData.
Rds stores a single R object. Yet, beyond that simple explanation, there are several differences from a "standard" storage. Probably this R-manual Link to readRDS() function clarifies such d...
How can I call controller/view helper methods from the console in Ruby on Rails?
... # get you the HTML
> response.cookies # hash of the cookies
# etc, etc
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Foreign key constraints: When to use ON UPDATE and ON DELETE
... therefore NULL may be preferable for this index.
– CPHPython
Aug 29 '16 at 12:02
1
@regilero, it...
How to modify PATH for Homebrew?
...
open your /etc/paths file, put /usr/local/bin on top of /usr/bin
$ sudo vi /etc/paths
/usr/local/bin
/usr/local/sbin
/usr/bin
/bin
/usr/sbin
/sbin
and Restart the terminal, @mmel
...
Default visibility for C# classes and members (fields, methods, etc.)?
... visibility of various aspects of C#. Class types, fields, methods, enums, etc.
4 Answers
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How do I run a Node.js application as its own process?
...ry Linux distribution comes with systemd, which means forever, monit, PM2, etc. are no longer necessary - your OS already handles these tasks.
Make a myapp.service file (replacing 'myapp' with your app's name, obviously):
[Unit]
Description=My app
[Service]
ExecStart=/var/www/myapp/app.js
Restart...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...server is looking at 127.0.0.1, those hosts need to be at the HEAD of the /etc/hosts file for fast lookups. I have several dozen 127.0.0.1 lines, only when I moved them to the TOP of the /etc/hosts file did they resolve fast for me.
– Joey T
Apr 26 '14 at 3:11...
Locate the nginx.conf file my nginx is actually using
...default nginx config file path.
$ nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
$ nginx -V
nginx version: nginx/1.11.1
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.1k 8 Jan 2015
TLS SNI su...
How to declare a structure in a header that is to be used by multiple files in c?
...used:
struct MyStruct ; /* Forward declaration */
struct MyStruct
{
/* etc. */
} ;
void doSomething(struct MyStruct * p) /* parameter */
{
struct MyStruct a ; /* variable */
/* etc */
}
While a typedef will enable you to write it without the struct keyword.
struct MyStructTag ; /* Forwar...
psql: FATAL: Ident authentication failed for user “postgres”
...
Edit the file /etc/postgresql/8.4/main/pg_hba.conf and replace ident or peer by either md5 or trust, depending on whether you want it to ask for a password on your own computer or not.
Then reload the configuration file with:
/etc/init.d/p...