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how to show lines in common (reverse diff)?
...mm -1 -2 file1.sorted file2.sorted
# where file1 and file2 are sorted and piped into *.sorted
Here's the full usage of comm:
comm [-1] [-2] [-3 ] file1 file2
-1 Suppress the output column of lines unique to file1.
-2 Suppress the output column of lines unique to file2.
-3 Suppress the output col...
Best way to convert text files between character sets?
...d close file
filename.txt : path to the file
" : qotes are here because of pipes. (otherwise bash will use them as bash pipe)
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Load different colorscheme when using vimdiff
... Is it possible to call more than one command between the two pipes "|"? I would be interested in return to original colorscheme after using vimdiff from vim too...
– Somebody still uses you MS-DOS
Jun 14 '10 at 13:30
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How can I get a java.io.InputStream from a java.lang.String?
...
Well, one possible way is to:
Create a PipedOutputStream
Pipe it to a PipedInputStream
Wrap an OutputStreamWriter around the PipedOutputStream (you can specify the encoding in the constructor)
Et voilá, anything you write to the OutputStreamWriter can be read fro...
内存管理内幕：动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...用（实际上，一些 malloc 实现只能将内存归还给程序，而无法将内存归还给操作系统）。
物理内存和虚拟内存
要理解内存在程序中是如何分配的，首先需要理解如何将内存从操作系统分配给程序。计算机上的每一个进程都认...
How do I change the working directory in Python?
...with this horrible hack:
def quote_against_shell_expansion(s):
import pipes
return pipes.quote(s)
def put_text_back_into_terminal_input_buffer(text):
# use of this means that it only works in an interactive session
# (and if the user types while it runs they could insert characters...
Running Windows batch file commands asynchronously
...b *.mpg grabs a list of .mpg files in my current directory, the | operator pipes this list into ppx2, which then builds a series of commands to be executed in parallel; 4 at a time, as specified here by the -P 4 operator. The -L 1 operator tells ppx2 to only send one line of our directory listing t...
Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...peat take n
(streamArrs(1 << 25, 1 << 14).zipWithIndex
pipe process1.chunk(4)
pipe process1.fold(0L) {
(c, vs) => c + vs.map(_._1.length.toLong).sum
}).runLast.run
This should work with any value for the n parameter (provided you're willing to wait long enough) ...
Cloning a MySQL database on the same MySql instance
...
As the manual says in Copying Databases you can pipe the dump directly into the mysql client:
mysqldump db_name | mysql new_db_name
If you're using MyISAM you could copy the files, but I wouldn't recommend it. It's a bit dodgy.
Integrated from various good other answe...
Concatenating Files And Insert New Line In Between Files
...trast to answers with >> (append), the output of this command can be piped into other programs.
Examples:
for f in File*.txt; do cat $f; echo; done > finalfile.txt
(for ... done) > finalfile.txt (parens are optional)
for ... done | less (piping into less)
for ... done | head -n -1 (th...