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string_operations

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expr "$string" : '.*' </code> stringZ=abcABC123ABCabc <code> echo ${#stringZ} # 15 echo `expr length $stringZ` # 15 echo `e... $substring is a regular expression. stringZ=abcABC123ABCabc # |------| echo `expr match "$stringZ" 'abc[A-Z]*.2'` # 8 echo `expr "$stringZ" :

test

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onstruct. ---- < is less than, in ASCII alphabetical order <code> if [[ "$a" < "$b" ]] if [ "... \< "$b" ] </code> Note that the "<" needs to be escaped within a [ ] construct. ---- > is greater than, in ASCII alphabetical order <code> if [[ "$a" > "$b" ]] if [ ... > "$b" ] </code> Note that the ">" needs to be escaped within a [ ] construct. See Example 27-11 for