Posts by carlosn • 176 points

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  A: Remove WWW and HTTP / HTTPS with regular expression

  To remove www, http and https you need to use replace as follows: string.replace( /www|https?/ , ''); The ? indicates that the s is optional can exist or not and if there is will be replaced. The |…

  regex

  answered 6 years, 3 months ago carlosn 176

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  A: Find a number after a specific word with grepl and regex {r}

  The following regular expression should solve the problem: "(?:km|rua)+\s*\D+?" Despite the small data show, I believe that if there are more variations just edit them. Example in Regex101…

  r regex

  answered 6 years, 3 months ago carlosn 176

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  A: Extract date with Regex

  Your regex is correct, but the ^ is an anchor and indicates that will perform the match at the beginning of String. To the String in question the ideal is to give a match on the first occurrence of…

  java string regex

  answered 6 years, 3 months ago carlosn 176

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  A: Convert arrays to hash

  What you need to do is to/from the data you have in the database with the header that you have. Another point is that the way you manipulate the data coming from the database can be them in array or…

  array hash perl map

  answered 6 years, 3 months ago carlosn 176

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  A: Because Chr() is vulnerable to "cache-timing" attack and pack() is not?

  When it comes to cryptography there are several aspects that should be taken into account. The fact of wearing pack() instead of char() refers to a concept called Binary safe making both input and…

  php cryptography

  answered 7 years, 9 months ago carlosn 176