UNIX for Dummies Questions & Answers

>sample
TCGGCCCGJOHNTTTTGCGGGCCGCATTGTCGCCAGGCGCDOEGGGGTTTGCGATCGCCACGGGGCTGATGGTGGCGACCCGCTGCACCCGG

awk '{gsub(/^.*JOHN|DOE.*$/,"",$0)} 1'

>sample
TTTTGCGGGCCGCATTGTCGCCAGGCGC

#!/bin/bash
Primers=( NULL "/^.*JOHN|DOE.*$/" )
for y in {1..1}
do
        echo "${Primers[$y]}"
        awk '{gsub("${Primers[$y]}","",$0)} 1' 1.txt
done

/^.*JOHN|DOE.*$/
>sample
TCGGCCCGJOHNTTTTGCGGGCCGCATTGTCGCCAGGCGCDOEGGGGTTTGCGATCGCCACGGGGCTGATGGTGGCGACCCGCTGCACCCGG

#!/bin/bash
Primers=( NULL "/^.*JOHN|DOE.*$/" )
for y in {1..1}
do
        echo "${Primers[$y]}"
        n=${Primers[$y]}
        awk '{gsub($n,"",$0)} 1' 1.txt
done

#!/bin/bash
Primers=( NULL "/^.*JOHN|DOE.*$/" "/^.*XXXX|YYYY.*$/" "/^.*ZZZZ|NNNN.*$/" "/^.*GGGGG|DDDD.*$/" )
for y in {1..4}
do
        echo "${Primers[$y]}"
        awk '{gsub("${Primers[$y]}","",$0)} 1' 1.txt
done

# shell variable
var="value"

# pass $var to AWK and use
awk -v label="$var" '{print label}'

#!/bin/bash
Primers=( NULL "/^.*JOHN|DOE.*$/" )
for y in {1..1}
do
	echo "${Primers[$y]}"
	n=${Primers[$y]}
	awk -v var="$n" '{gsub(var,"",$0)} 1' 1.txt
done

/^.*JOHN|DOE.*$/
>sample
TCGGCCCGJOHNTTTTGCGGGCCGCATTGTCGCCAGGCGCDOEGGGGTTTGCGATCGCCACGGGGCTGATGGTGGCGACCCGCTGCACCCGG

Primers=( NULL "^.*JOHN|DOE.*$" )

Primers=( NULL '^.*JOHN|DOE.*$' )