UNIX for Dummies Questions & Answers

awk '{ print $1}' |
while read num
do
  foo "$num"
done

awk '{ print $1 $2}' |

 awk '{ print $1}' |

awk '$2 > 16 {print $1}' file | while read num
do      do something with $num
done

while IFS=">*" read A B C; do [ "$C" == "anc" ] && echo call foo $B; done </tmp/textfile
call foo 1-18
call foo 1-2
call foo 1-24

awk '{ print $1, $2}'| 
while read A B;
do 
echo $A, $B
if [ "$B" -eq "16" ];
then 
   grep -A 1 $A $1 | python unreverse.py  
else
   grep -A 1 $A
fi
done

awk 'NF{print $1}' FS=\* RS=\> file |
while IFS=- read A B
do
  echo "A:$A B:$B"
done

#!/bin/bash
# OSX 10.7.5, default bash terminal.
ifs_str="$IFS"
IFS=" >*"
echo ' >1-18*anc
caggttcagctggtgcagtctggagctgaggtgaagaagcctggggcctcagtgaaggtctcctgcaaggcttctggttacacctttaccagctatggtatcagctgggtgcgacaggcccctggacaagggcttgagtggatgggatggatcagcgcttacaatggtaacacaaactatgcacagaagctccagggcagagtcaccatgaccacagacacatccacgagcacagcctacatggagctgaggagcctgagatctgacgacacggccgtgtattactgtgcgagaga
>1-2*anc
caggtgcagctggtgcagtctggggctgaggtgaagaagcctggggcctcagtgaaggtctcctgcaaggcttctggatacaccttcaccggctactatatgcactgggtgcgacaggcccctggacaagggcttgagtggatgggacggatcaaccctaacagtggtggcacaaactatgcacagaagtttcagggcagggtcaccatgaccagggacacgtccatcagcacagcctacatggagctgagcaggctgagatctgacgacacggtcgtgtattactgtgcgagaga
>1-24*anc
caggtccagctggtacagtctggggctgaggtgaagaagcctggggcctcagtgaaggtctcctgcaaggtttccggatacaccctcactgaattatccatgcactgggtgcgacaggctcctggaaaagggcttgagtggatgggaggttttgatcctgaagatggtgaaacaatctacgcacagaagttccagggcagagtcaccatgaccgaggacacatctacagacacagcctacatggagctgagcagcctgagatctgaggacacggccgtgtattactgtgcaacaga' > /tmp/textfile
textarray=($(cat /tmp/textfile))
subarray=1
while [ $subarray -lt ${#textarray[@]} ]
do
	if [ ${textarray[$subarray]:$((${#textarray[$subarray]}-2)):2} -ge 16 ]
	then
		echo "Run a python script..."
	else
		echo "Do something else..."
	fi
	subarray=$((subarray+2))
done
IFS="$ifs_str"
exit 0

Last login: Sat Jan 24 20:37:07 on ttys000
AMIGA:barrywalker~> cd Desktop/Code/Shell
AMIGA:barrywalker~/Desktop/Code/Shell> ./get16.sh
Run a python script...
Do something else...
Run a python script...
AMIGA:barrywalker~/Desktop/Code/Shell> _