Steven Vo stevenvo

Install rmate on remote server that stores the files for editing

gem install rmate (you may need to add sudo)

SSH into the remote server using this syntax

ssh -R 52698:localhost:52698 [email protected] (change the username@host accordingly)

inside remote server, run rmate

	# Stereo record - dual channels
	arecord -f cd -D plughw:1,0 -d 20 test.wav

	# Mono - single channel
	arecord -f S16_LE -D plughw:1,0 -d 20 -r 16000 test.wav

	#read
	pocketsphinx_continuous -samprate 16000/8000/48000 -infile test.wav

	If you encounter this error while `sudo apt-get update` on Debian
	W: GPG error: http://ftp.debian.org experimental Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010

	_Solution_
	$ gpg --keyserver pgpkeys.mit.edu --recv-key 8B48AD6246925553
	$ gpg -a --export 8B48AD6246925553\|sudo apt-key add -

	$ gpg --keyserver pgpkeys.mit.edu --recv-key 7638D0442B90D010
	$ gpg -a --export 7638D0442B90D010\|sudo apt-key add -

	Do the following:

	grep -rnw '/path/to/somewhere/' -e "pattern"

	grep --exclude=\*.{o,a,.so} -rnw '.' -e "msse"

	-r or -R is recursive, -n is line number and -w stands match the whole word. -l (letter L) can be added to have just the file name.

	Along with these, --exclude or --include parameter could be used for efficient searching. Something like below:

	#!/bin/bash

	for sysdevpath in $(find /sys/bus/usb/devices/usb*/ -name dev); do
	(
	syspath="${sysdevpath%/dev}"
	devname="$(udevadm info -q name -p $syspath)"
	[[ "$devname" == "bus/"* ]] && continue
	eval "$(udevadm info -q property --export -p $syspath)"
	[[ -z "$ID_SERIAL" ]] && continue
	echo "/dev/$devname - $ID_SERIAL"

	###### FORCE DATA FORMAT IN PANDAS ######
	pd.options.display.float_format = '{:,.2f}'.format


	# NOTES:
	# 1. DO NOT update row in df.iterrows() -> https://stackoverflow.com/questions/25478528/updating-value-in-iterrow-for-pandas
	# Use df.loc[idx, '<col>'] = <value>


	###### REGEX on DataFrame ######

	diskUtil unmountDisk /dev/disk2
	sudo dd bs=1m if=2015-01-31-raspbian_x300.img of=/dev/rdisk2

	# RPN Calculator
	#
	# SPECIFICATIONS:
	# REQ 1: The calculator should use standard input and standard output, unless the language makes that impossible.
	# REQ 2: It should implement the four standard arithmetic operators
	# REQ 3: It should support negative and decimal numbers, and should not have arbitrary limits on the number of operations.
	# REQ 4: The calculator should not allow invalid or undefined behavior.
	# REQ 5: The calculator should exit when it receives a q command or an end of input indicator (EOF).

	class RpnStack