结合Regexp和值集（散列/数组）来比较字符串是否与ruby匹配

Question

I have the following pattern to check:

"MODEL_NAME"-"ID"."FORMAT_TYPE"

where, for example:

MODEL_NAME = [:product, :brand]
FORMAT_TYPE = [:jpg, :png]

First I wanted to check if the regexp is something like:

/^\w+-\d+.\w+$/

and I have also to check if the part of my string is part of my arrays. I want something more flexible than:

/^(product|brand)-\d+.(jpg|png)$/

which I could manage through my arrays. What is a good solution to do it?

Answer 1

/^(#{MODEL_NAME.join '|'})-\d+\.(#{FORMAT_TYPE.join '|'})$/
# => /^(product|brand)-\d+\.(jpg|png)$/