how to know if a string contains a certain pattern

Deanne · #1 (**permalink**) 08-08-2007

say i want to know if string1 contains string2.
thanks a lot!

firdousamir · #2 (**permalink**) 08-08-2007

echo $string1 | grep -c $string2

Deanne · #3 (**permalink**) 08-08-2007

thank you!

matrixmadhan · #4 (**permalink**) 08-08-2007

Code:

a=bigfish
b=fish

Code:

echo $b  | awk -v var=$a '{ if ( match(var, $0) && length < length(var) ) { print "yes" } else { print "no" } }'

Klashxx · #5 (**permalink**) 08-08-2007

Awk without parsing:

Code:

string1="holacaracola"                                              
string2="hola"                                                      
echo $string1|awk '{if (match($0,/'"${string2}"'/)){print "MATCH"}}'
MATCH

Deanne · #6 (**permalink**) 08-08-2007

Matrixmadhan, Klashxx, I am very bad at awk and sed. And, im not sure if these will work with csh? I tried them both and got:
awk: syntax error near line 1
awk: illegal statement near line 1
awk: syntax error near line 1
awk: bailing out near line 1

reborg · #7 (**permalink**) 08-08-2007

In csh it would be ( for example )

Code:

set a=bigfish
set b=fish
echo $b  | awk -v var=$a '{ if ( match(var, $0) && length < length(var) ) { print "yes" } else { print "no" } }'

however this would be simpler:

Code:

set a=bigfish
set b=fish

echo $a | awk -v b="$b" '$0 ~ b { print "MATCH" }'

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