How to write a regex expression to match strings which is concat by "00" and "11&quot-CodePudding

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How to write a regex expression to match strings which is concat by "00" and "11"

Time：07-01

that is to say, the string is combined with pair "00" and "11"s.

Example: match: "0000" "0011" "111111" "110011" not match: "000" "0100" "00111" "120011" "1000"

CodePudding user response：

Please see solution below:

^(00|11) $