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bash programming problem on string

bash programming problem on string# Unix - 噫吁兮，危乎高哉

s*n2003-06-29 07:06

1 楼

Hi, I want to find out where a string contains another string, for example,
whether "asdfsdxyx1234" contains "xyx1". How can I do that by bash shell
script? I tried expr match and expr index but could not figure it out.
Thanks.

m*h2003-06-29 07:06

2 楼

i use a dumb method:
if echo "asdfsdxyx1234" | grep "xyx1" 1>/dev/null 2>&1; then
blah
blah
fi

【在 s**n 的大作中提到】

: Hi, I want to find out where a string contains another string, for example,
: whether "asdfsdxyx1234" contains "xyx1". How can I do that by bash shell
: script? I tried expr match and expr index but could not figure it out.
: Thanks.

m*s2003-06-29 07:06

3 楼

a=abcdefg; b=bcd; if ( [[ $a == *$b* ]] ); then echo contain; fi

【在 s**n 的大作中提到】

: Hi, I want to find out where a string contains another string, for example,
: whether "asdfsdxyx1234" contains "xyx1". How can I do that by bash shell
: script? I tried expr match and expr index but could not figure it out.
: Thanks.

c*t2003-06-29 07:06

4 楼

hoho, I was going to use case, but yours is simpler I guess.

【在 m***s 的大作中提到】

: a=abcdefg; b=bcd; if ( [[ $a == *$b* ]] ); then echo contain; fi

c*y2003-06-29 07:06

5 楼

# Bourne shell
if [ "${str/$substr/}" != "$str" ]; then
echo "is a substing"
else
echo "not a substring"
fi

【在 s**n 的大作中提到】

: Hi, I want to find out where a string contains another string, for example,
: whether "asdfsdxyx1234" contains "xyx1". How can I do that by bash shell
: script? I tried expr match and expr index but could not figure it out.
: Thanks.

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