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function [] = batchConvert(funhandle, indir, outdir, varargin)
%BATCHCONVERT Convert multiple files with given conversion function
%   BATCHCONVERT(FUNC, INDIR, OUTDIR) converts every file or directory in 
%   INDIR using conversion funtion FUNC and save the converted files to 
%   OUTDIR with the same names as in INDIR.
%
%   FUNC is a function handle that takes source filename and target 
%   directory as input variables. For example, if FUNC = @foo, then 
%   BATCHCONVERT calls foo(infile, outfile) to every infile in INDIR.
%   

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cut -d ':' -f 1,3 /etc/passwd | sort -t ':' -k2n - | tr ':' '\t'

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# Copy public-key to remote-machine for public-key authentication
ssh-copy-id someuser@remote-machine

# To specify port number
ssh-copy-id "someuser@remote-machine -p port_number"

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function [] = batchProcess(funhandle, indir, varargin)
%BATCHPROCESS Process multiple files with given processing function
%   BATCHPROCESS(FUNC, INDIR) processes every file or directory in 
%   INDIR using processing funtion FUNC.
%
%   FUNC is a function handle that takes source filename and target 
%   directory as input variables. For example, if FUNC = @foo, then 
%   BATCHPROCESS calls foo(infile) to every infile in INDIR.
%   
%   BATCHPROCESS(..., 'para1', value1, 'para2', value2, ...) takes extra 

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%%  checking minimum arguments requried
minargs = 3;
maxargs = inf;
n_exargs = length(varargin);

try
    narginchk(minargs, maxargs);
catch err
    if strcmp(err.identifier,'MATLAB:narginchk:notEnoughInputs')
        error('batchconvert:notEnoughInputs',...

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# Initalize git repository
git init
git add .
git commit -m "first commit"

# Initialize git repository on Dropbox folder as remote branch
cd ~/Dropbox/git
git init --bare project.git

# Add remote to local git repository

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function [combination] = batchCombine(funhandle, indir, varargin)
%BATCHCOMBINE Process multiple files and combine the results into a cell array
%   BATCHCOMBINE(FUNC, INDIR) processes every file or directory in 
%   INDIR using processing funtion FUNC.
%
%   FUNC is a function handle that takes source filename as input variables.
%   For example, if FUNC = @foo, then BATCHCOMBINE calls foo(infile) to 
%   every infile in INDIR.
%   
%   BATCHCOMBINE(..., 'para1', value1, 'para2', value2, ...) takes extra 

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# Use tar to direct output to standard output "-" and use gzip to compress
tar -cf - <source_file> | gzip -1 > <destination_file>

# Same effect, be sure to put <destination_file> directly behind -f option
tar -czf <destination_file> <source_file>

# Untar
tar -xzf <tar_file>

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Change Bash version on OS X

• Installation

sudo port install bash

• Add it to your shells: add installed bash to /etc/shells

sudo vim /etc/shells

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# change directory and sync Finder window
sd () {
    # change terminal directory
    cd "$@" || return
    # sync Finder window or open new one if not exists
    osascript -e "tell application \"Finder\"
        if front Finder window exists then
            set target of front Finder window to (""\"$PWD\""" as POSIX file)
        else
            open (""\"$PWD\""" as POSIX file)