How is the AND OR operator represented as in Regular Expressions

Question

I m currently programming a vocabulary algorithm that checks if a user has typed in the word correctly  I have the following situation  The correct solution for the word would be  part1  part2   The user should be able to enter either  part1   answer 1    part2   answer 2  or  part1  part2   answer 3    I now try to match the string given by the user with the following  automatically created  regex expression     part1 part2     This only returns answer 1 and 2 as correct while answer 3 would be wrong  I m now wondering whether there s an operator similar to   that says and or instead of either   or   May anyone help me solve this problem

User · Answer

Or you can use this        part 12   part 1  12

User · Answer

Not an expert in regex  but you can do    part1 part2   part1  part2     In words   part 1 or part2 or both

User · Answer

use  if in vim   s       quot  g  will replace   and   on  quot  so  lol  becomes  quot lol quot

User · Answer

part1 part2 part1 part2      does it work

User · Answer

Does this work without alternation      part 1    22     part2      or why not this      part 1     22       4      The first works for all conditions the second for all but part2 using GNU sed 4 1 5

User · Answer

I m going to assume you want to build a the regex dynamically to contain other words than part1 and part2  and that you want order not to matter  If so you can use something like this           part1 part2 part3       Positive matches   part1 part2  part1 part1  part2  part3   Negative matches   part1              with and without trailing spaces  part3  part2   otherpart1

[regex] How is the AND/OR operator represented as in Regular Expressions?

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