Comment on \d less efficient than [0-9]parentComments−hkmurakami13yoh wow I had no idea that "full width digits" can actually be handled properly. (U+FF10 ~ U+FF19)−coldtea13yOr improperly. If you expect \d to be a shorthand for 0-9, your string can also contain junk.
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oh wow I had no idea that "full width digits" can actually be handled properly. (U+FF10 ~ U+FF19)
Or improperly. If you expect \d to be a shorthand for 0-9, your string can also contain junk.