Read from in a streaming way

1	while read line; do ${CMD}; done

Tokenize a csv

1 2 3 4

for i in $(cat $1); do IFS=',' read -a array <<< "$i"; echo ${array[0]} ${array[1]} ${array[2]}; done

Redirection

Bidirectional

1 2	exec 4<>(command) command <&4 >&4

Named Pipe

1 2 3

cd /tmp mkfifo fifo exec < fifo

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