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R - Markdown avoiding package loading messages
...=FALSE to exclude everything in a chunk.
```{r include=FALSE}
source("C:/Rscripts/source.R")
```
If you only want to suppress messages, use message=FALSE instead:
```{r message=FALSE}
source("C:/Rscripts/source.R")
```
...
How to generate random SHA1 hash to use as ID in node.js?
...ng that has a lot more outputs? Like a timestamp with milliseconds? Or JavaScript's Math.random? Or even a combination of those two?!
Let's compute just how many unique ids we would get ...
The uniqueness of a timestamp with milliseconds
When using (new Date()).valueOf().toString(), you're gett...
Renaming or copying files and folder using NERDTree on Vim. Is it possible?
... simulate the "right click" menus
that most file explorers have. The
script comes with two default menu
plugins: exec_menuitem.vim and
fs_menu.vim. fs_menu.vim adds some
basic filesystem operations to the
menu for
creating/deleting/moving/copying files
and dirs. exec_menuitem.vim p...
Git, see a list of comments of my last N commits
...g. git log -5. If you're limiting the number of commits to output within a script, you should be kind to others and use the long option, e.g. git log --max-count=5.
– Dennis
Apr 3 '14 at 18:21
...
Redis cache vs using memory directly
..., various item eviction policies, blocking queues, pub/sub, atomicity, Lua scripting, etc ...
Redis can replicate its activity with a master/slave mechanism in order to implement high-availability.
Basically, if you need your application to scale on several nodes sharing the same data, then someth...
How to update Python?
... be unzipped into a fresh directory and then App\lib\site-packages and App\Scripts could be copied to the new installation, but if this didn't work then reinstalling all packages might have been necessary. Use pip list to see what packages were installed and their versions. Some were installed by Po...
Getting pids from ps -ef |grep keyword
...
Had to use the [k] trick on pgrep -f. My script was running in a subshell so I think it was picking up its parent command (hard to know for sure - the pid it returned was gone when the command was done executing!)
– ArtOfWarfare
...
How to render a PDF file in Android
...sDialog.show( context, context.getString( R.string.pdf_show_local_progress_title ), context.getString( R.string.pdf_show_local_progress_content ), true );
// Create the download request
DownloadManager.Request r = new DownloadManager.Request( Uri.parse( pdfUrl ) );
r.setDest...
What does @: (at symbol colon) mean in a Makefile?
...conditions come up false and nothing gets done.
For example (from Linux's scripts/Makefile.clean):
__clean: $(subdir-ymn)
ifneq ($(strip $(__clean-files)),)
+$(call cmd,clean)
endif
ifneq ($(strip $(__clean-dirs)),)
+$(call cmd,cleandir)
endif
ifneq ($(strip $(clean-rule)),)
+$(clean-r...
add maven repository to build.gradle
...
You will need to define the repository outside of buildscript. The buildscript configuration block only sets up the repositories and dependencies for the classpath of your build script but not your application.
...