Bash regex =~ operator match prefix -


why match

[[ 'hithere' =~ hi* ]]

but not

[[ 'hithere' =~ *there ]]

=~ regular expressions operator. if want match 0 or more characters, you'll need .* instead of *.

[[ 'hithere' =~ hi.* ]] && echo "yes" yes  [[ 'hithere' =~ .*there ]] && echo "yes" yes

without anchors, though, match succeed without wildcards.

[[ 'hithere' =~ hi ]] [[ 'hithere' =~ there ]] # add anchors guarantee you're matching whole phrase. [[ 'hithere' =~ ^hi.*$ ]] [[ 'hithere' =~ ^.*there$ ]]

for pattern matching, can use = unquoted value. uses bash pattern matching instead, (evidently) expecting.

[[ 'hithere' = hi* ]] && echo "yes" yes  [[ 'hithere' = *there ]] && echo "yes" yes

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