Shell Programming and Scripting

table = [apple,orange,tomato];
i=0;
do{
       grep table[i] h.txt;
}while(i<3);

table = [apple,orange,tomato];
i=0;
for(i=0;i<3;i++)
      grep table[i] h.txt;

[ctsgnb@shell ~]$ cat veg
whatever
orange
tomato
whatever
tomato
whatever
[ctsgnb@shell ~]$ var='tomato|orange'
[ctsgnb@shell ~]$ grep -E "$var" veg
orange
tomato
tomato
[ctsgnb@shell ~]$

#!/bin/bash
table=(apple orange tomato)
for((i=0; i < ${#table[@]}; i++))
do
    grep ${table[$i]} h.txt
done

#cat toto
orange
tomato
# grep -f toto veg
orange
tomato
tomato