Is there something special with that directory or are you really just asking how to copy directories?

Copy recursively via CLI:

    cp -R &lt;sourcedir&gt; &lt;destdir&gt;

If you&#39;re only seeing the files under the `sourcedir` being copied (instead of `sourcedir` as well), that&#39;s happening because you kept the trailing slash for `sourcedir`:

    cp -R &lt;sourcedir&gt;/ &lt;destdir&gt;

The above only copies the files and their directories inside of `sourcedir`. Typically, you want to include the directory you&#39;re copying, so drop the trailing slash:

    cp -R &lt;sourcedir&gt; &lt;destdir&gt;


tl;dr

    cp -R &quot;/src/project 1/App&quot; &quot;/src/project 2&quot;

Explanation:

Using quotes will cater for spaces in the directory names

    cp -R &quot;/src/project 1/App&quot; &quot;/src/project 2&quot;

If the App directory is specified in the destination directory:

    cp -R &quot;/src/project 1/App&quot; &quot;/src/project 2/App&quot;

and &quot;/src/project 2/App&quot; already exists the result will be &quot;/src/project 2/App/App&quot;

Best not to specify the directory copied in the destination so that the command can be repeated over and over with the expected result.

Inside a bash script:

    cp -R &quot;${1}/App&quot; &quot;${2}&quot;






I have a dataframe and I would like to count the number of rows within each group. I reguarly use the `aggregate` function to sum data as follows:

    df2 &lt;- aggregate(x ~ Year + Month, data = df1, sum)

Now, I would like to count observations but can&#39;t seem to find the proper argument for `FUN`. Intuitively, I thought it would be as follows:

    df2 &lt;- aggregate(x ~ Year + Month, data = df1, count)

But, no such luck.

Any ideas?

-------

Some toy data:

    set.seed(2)
    df1 &lt;- data.frame(x = 1:20,
                      Year = sample(2012:2014, 20, replace = TRUE),
                      Month = sample(month.abb[1:3], 20, replace = TRUE))

Count number of rows within each group

Due to some deployment issues I stopped tracking schema.rb in git. Somehow I have stuffed this up and somewhere along the way my schema.rb file has disappeared.

Is there a way of regenerating schema.rb from the database or from the migrations? I would prefer not to lose the existing data.


Lost my schema.rb! Can it be regenerated?

Hi I&#39;m trying to copy my rails_projects directory from haseebjaved/Desktop/rails_projects to my home directory, which is haseebjaved.

How can I do this via the Command Line?

Also, can I see my home directory on the UI or only via the Command Line in Mac OS X? 

Is it possible to copy directories to and from my home directory via the UI? Or only via Command Line?

Thank you

How to copy directories in OS X 10.7.3?

Hi I'm trying to copy my rails_projects directory from haseebjaved/Desktop/rails_projects to my home directory, which is haseebjaved.
How can I do this via the Command Line?
Also, can I see my home directory on the UI or only via the Command Line in Mac OS X?
Is it possible to copy directories to and from my home directory via the UI? Or only via Command Line?
Thank you

I have been developing a script on my linux box for quite some time, and wanted to run it on my Mac as well.

I thought that the functions on the Mac were the same as the functions on linux, but today I realized it was wrong. I knew that fewer functions existed on the Mac, but I thought that the functions that did exist, had the same implementation.

This problem is specifically in regards to the `date` command.

When I run the command on my linux machine with the parameter to provide some time in nanoseconds, I get the correct result, but when I run it on my mac, it does not have that option.
   
    Linux-Machine&gt; date +%N
    55555555555 #Current time in nanoseconds
    Mac-Machine&gt; date +%N
    N

How do I go about getting the current time in nanoseconds as a bash command on the Mac?

Worst case is I create a small piece of code that calls a system function in C or something and then call it within my script.

Any help is much appreciated!

Date command does not follow Linux specifications (Mac OS X Lion)

I have been looking throughout the system but I cannot find it. When I do echo $PATH I get the stuff I added, plus the default path. I do not have a .profile, and I do have a .bashrc, but the default path is not in there. I am looking for it just to know where it is located because all the tutorials explain that its in .profile... but what if you don&#39;t have one? Where is it located then? Anybody have any ideas?

Where is the default terminal $PATH located on Mac?

I have found a few other posts that show how to add a script to increment the build number with a script:

https://stackoverflow.com/questions/9258344/xcode-better-way-of-incrementing-build-number

https://stackoverflow.com/questions/7371345/xcode-projects-build-number

https://stackoverflow.com/questions/4694070/can-xcode-insert-the-version-number-into-a-librarys-filename-when-building

But what I want to do, is only increase the build number when I use ARCHIVE (both before and after).

Example:
If current build number is 21, then when I choose Product &gt; Archive the build number will be increased to 22, it will go through its process of building and creating the Archive file with the build number of 22, and then when it is finished archiving, it will increase the build number to 23.


Xcode-Increment build number only during ARCHIVE?

I&#39;m trying to run this script on Mac OS 10.7 (Lion) and I&#39;m getting the error:

    $ bbcolors
    -bash: /usr/local/bin/bbcolors: /usr/bin/env: bad interpreter: Operation not permitted

I&#39;ve successfully run this script on other Macs of mine. It&#39;s just [this script][1] downloaded and unmodified from Daring Fireball.

I found [this person][2] with a very similar problem but the accepted answer was that the filesystem had a &#39;noexe&#39; option on mount.  I&#39;m pretty sure that&#39;s not the case for me because I&#39;ve just got it in /usr/local/bin/ and other stuff in there works fine (it also doesn&#39;t run from other places or as other users including root).

    $ which bbcolors
    /usr/local/bin/bbcolors
    $ ls -l /usr/local/bin/bbcolors 
    -rwxr-xr-x@ 1 nick  staff  9751 Mar 30 19:09 /usr/local/bin/bbcolors

It&#39;s a Perl script not a compiled binary, not that that should matter.  Here&#39;s some extra info for what it&#39;s worth:

    $ cat /usr/local/bin/bbcolors |head -n 1
    #!/usr/bin/env perl
    $ which perl
    /usr/bin/perl
    $ env | grep PATH
    PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin


  [1]: http://daringfireball.net/projects/bbcolors/
  [2]: https://stackoverflow.com/questions/9501063/sysroot-sh-operation-not-permitted

Mac OS: /usr/bin/env: bad interpreter: Operation not permitted

When I&#39;m editing with files on the server, and I click to edit them, if I&#39;m editing multiple files (say an HTML file and a CSS file) but they open in new windows, which, on my small laptop display is a little inconvenient.

How do I make it open in a new tab, rather than a new window?

In Sublime Text 2, how do I open new files in a new tab?

Can anyone tell me the difference between these two methods: 
 
- `file.mkdir()`
- `file.mkdirs()`

Difference between mkdir() and mkdirs() in java for java.io.File

I know that this is not something that should ever be done, but is there a way to use the slash character that normally separates directories within a filename in Linux?


Is it possible to use &quot;/&quot; in a filename?

What is current directory of shell script? I this current directory from which I called it? Or this directory where script located?

Shell script current directory?

How can I remove an empty folder locally and also have that happen for other collaborators that share the remote via pull-push?  I know that folders aren&#39;t &#39;tracked&#39; in that sense by git but the question remains.

e.g. I moved a file to another folder and committed the change (of the move).

But I can&#39;t `git rm name` the folder as I get &quot;doesn&#39;t match&quot;
`git rmdir name` doesn&#39;t exist.

I can do a `git clean -f folder` but how does that get pushed up?

I can directly `rm` the file but how do I get that directory removal done correctly and pushed to the repository and then out to others when they pull so that their existing folder gets deleted?



git - how to remove empty folder and push that change?

I need to extract the name of the parent directory of a certain path. This is what it looks like: 

    C:\stuff\directory_i_need\subdir\file.jpg

I would like to extract `directory_i_need`.

Extract a part of the filepath (a directory) in Python

I am trying to keep a temporary container of a class that contains member :

    HashMap&lt;Integer,myObject&gt; myobjectHashMap

A class called myobjectsList

Then I do 

    myobjectsListA = new myobjectsList();
    myobjectsListB = new myobjectsList();

then: Add some hashmap items to A (like 2)

then:
 
    myobjectListB = myobjectListA; //B has 2

then: Add hashmap items to A (like 4 more)

then: return A to the items stored in B

    myobjectListA = myobjectListb;


But when I do this, B grows with A while I am adding hashmap items to A.
A now has 6 items in it because B had 6.

I want A to still have the original 2 at the end after last assignment.
In C++ I would use copy with objects, what is the java equivalent?

Added: OK I left something out explaining this. `MyObjectsList` does not contain the HashMap, it is derived from a class `MyBaseOjbectsList` which has the HashMap member and `MyObjectsList` extends `MyBaseOjbectsList`. Does this make a difference?


Copying a HashMap in Java

I&#39;m having a little trouble understanding the pass-by-reference properties of `data.table`. Some operations seem to &#39;break&#39; the reference, and I&#39;d like to understand exactly what&#39;s happening.

On creating a `data.table` from another `data.table` (via `&lt;-`, then updating the new table by `:=`, the original table is also altered. This is expected, as per:

`?data.table::copy`
and [stackoverflow: pass-by-reference-the-operator-in-the-data-table-package](&lt;https://stackoverflow.com/questions/8030452/pass-by-reference-the-operator-in-the-data-table-package&gt;)

Here&#39;s an example:

    library(data.table)

    DT &lt;- data.table(a=c(1,2), b=c(11,12))
    print(DT)
    #      a  b
    # [1,] 1 11
    # [2,] 2 12

    newDT &lt;- DT        # reference, not copy
    newDT[1, a := 100] # modify new DT

    print(DT)          # DT is modified too.
    #        a  b
    # [1,] 100 11
    # [2,]   2 12

However, if I insert a non-`:=` based modification between the `&lt;-` assignment and the `:=` lines above, `DT` is now no longer modified:

    DT = data.table(a=c(1,2), b=c(11,12))
    newDT &lt;- DT        
    newDT$b[2] &lt;- 200  # new operation
    newDT[1, a := 100]

    print(DT)
    #      a  b
    # [1,] 1 11
    # [2,] 2 12

So it seems that the `newDT$b[2] &lt;- 200` line somehow &#39;breaks&#39; the reference. I&#39;d guess that this invokes a copy somehow, but I would like to understand fully how R is treating these operations, to ensure I don&#39;t introduce potential bugs in my code.

I&#39;d very much appreciate if someone could explain this to me.

Understanding exactly when a data.table is a reference to (vs a copy of) another data.table

I want to copy a file from a jar. The file that I am copying is going to be copied outside the working directory. I have done some tests and all methods I try end up with 0 byte files.

**EDIT**: I want the copying of the file to be done via a program, not manually.

How to copy file inside jar to outside the jar?

I need to copy the content of a folder which contains binary files to one binary file in another directory. 

In Windows I can just use:

    copy file1 + file2 targetfile /B 

I couldn&#39;t find something similar for Linux (I saw an approach with `cat`, but I&#39;m unsure if this really works for binary files).

How can I copy several binary files into one file on a Linux system?

I need to copy a `cv::Mat` image (source) to an ROI of another (Destination) `cv::Mat` image.

I found [this reference][1], but it seems that it does not work for my case.
Do you have any pointers how could I do this using the OpenCV C++ interface?


  [1]: https://stackoverflow.com/questions/7041181/equivalent-to-cvsetimageroi-in-the-opencv-c-interface

Content Type	Original Author	Original Content on Stackoverflow
Question	hjaved	View Question on Stackoverflow
Solution 1 - Macos	Andy Friese	View Answer on Stackoverflow
Solution 2 - Macos	Gary Davies	View Answer on Stackoverflow

How to copy directories in OS X 10.7.3?

Macos Problem Overview

Macos Solutions

Solution 1 - Macos

Solution 2 - Macos

Lost my schema.rb! Can it be regenerated?

Count number of rows within each group

Attributions