Analyzing shell string contains five methods

 

strA="long string"
strB="string"
result=$(echo $strA | grep "${strB}")
if [[ "$result" != "" ]]
then
    echo "包含"
else
    echo "不包含"
fi



strA="helloworld"
strB="low"
if [[ $strA =~ $strB ]]
then
    echo "It contains " 
the else 
    echo " does not include " 
Fi 




A = " HelloWorld " 
B = " Low " 
IF [[$ A $ B == * * ]] 
the then 
    echo " contains " 
the else 
    echo " does not include " 
Fi 





thisString = " . 1 2. 3 45 " # source string 
The searchString = ' . 1 2 " # string
 Case $ thisString in 
    * "$searchString"*) echo "包含" ;;
    *) echo "不包含" ;;
esac




STRING_A=$1
STRING_B=$2
if [[ ${STRING_A/${STRING_B}//} == $STRING_A ]];then
    ## is not substring.
    echo "包含"
    exit 0
else
    ## is substring.
    echo "不包含"
    exit 1
fi

 

 

reference:

Site  stackoverflow  and segmentfault .