Extracting the Column with condition



  • @Alan-Kilborn said in Extracting the Column with condition:

    @nicol-arm

    Column with condition

    Umm, I think you left off what the condition is…and it appears you are extracting rows, not columns…??

    sorry it’s row



  • @nicol-arm

    I repeat:

    I think you left off what the condition is

    In other words, what are the criterion for keeping version discarding a row?



  • @Alan-Kilborn said in Extracting the Column with condition:

    In other words, what are the criterion for keeping version discarding a row?

    Excuse me but I don’t understand, I only require the rows that start with the mail



  • @nicol-arm said in Extracting the Column with condition:

    I only require the rows that start with the mail

    “start with the mail” is a very unhelpful condition. Do you mean “start with certain email addresses that @nicol-arm has in mind but is asking the Community to infer from the post”? Or do you mean “start with only a valid email address, which @nicol-arm happens to assume has no colon :, so the Community should infer anything with a colon : before the @ is not a line matched”? Or something else that I cannot guess?

    If you want help, you have to provide details. The below will help you understand better; please read it!

    -----

    Please Read And Understand This

    FYI: I often add this to my response in regex threads, unless I am sure the original poster has seen it before. Here is some helpful information for finding out more about regular expressions, and for formatting posts in this forum (especially quoting data) so that we can fully understand what you’re trying to ask:

    This forum is formatted using Markdown. Fortunately, it has a formatting toolbar above the edit window, and a preview window to the right; make use of those. The </> button formats text as “code”, so that the text you format with that button will come through literally ; use that formatting for example text that you want to make sure comes through literally, no matter what characters you use in the text (otherwise, the forum might interpret your example text as Markdown, with unexpected-for-you results, giving us a bad indication of what your data really is).

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    Please note that for all regex and related queries, it is best if you are explicit about what needs to match, and what shouldn’t match, and have multiple examples of both in your example dataset. Often, what shouldn’t match helps define the regular expression as much or more than what should match.

    Here is the way I usually break down trying to figure out a regex (whether it’s for myself or for helping someone in the forum):

    1. Compare what portions of each line I want to match is identical to every other one (“constants”), and what parts do I want to allow to be different in each line (“variables”) but still be part of the match.
    1. Look at both the variables and constants, and see what portions of each I’ll want to keep or move around, vs which parts get thrown away completely. Each sub-component that I want to keep will be put in a regex group. Anything that gets completely thrown away doesn’t need to be in a group, though sometimes I put it in a numbered (___) or unnumbered (?:___) group anyway, if I have a good reason for it. Anything that needs to be split apart, I break into multiple groups, instead of having it as one group.
    1. For each group, I do a mental “how would I describe to my son how to correctly match these characters?” – which should hopefully give me a simple, foolproof algorithm of characters that must match or must not match; then I ask, “how would I translate those instructions into regex sequences?” If I don’t know the answer to the second, I read documentation, or ask a specific question.
    1. try it, debug, iterate.


  • This post is deleted!


  • @PeterJones

    Excuse me sir, I didn’t want to bother you



  • @nicol-arm said in Extracting the Column with condition:

    I didn’t want to bother you

    You’re not bothering anyone, you just need to frame your problem statement so it makes sense. Otherwise, no one will be able to help you with your problem. Do you understand?



  • @nicol-arm said in Extracting the Column with condition:

    @PeterJones

    Excuse me sir, I didn’t want to bother you

    As I said before, “If you want help, you have to provide details.” I wasn’t trying to say “<wc_fields_impression>go away kid, you bother me</wc_fields_impression>”. I was trying to help you: we cannot answer you unless you give us enough information to go on. So far, no matter who asks for clarification, or how, you aren’t providing the additional details. If you want help, you will have to help us help you by answering the questions we ask.



  • @PeterJones

    I guess we scare people off.
    Pesky us, asking for some level of detail.



  • @Alan-Kilborn

    friend these are my lines

    rotector:lyndennelson_@hotmail.com:1402889569brotector:brotector:brotector:brotector
    chris.vancura@me.com:1402889576:DI)d/:134A2FF5-A236-471C-944A-EA3C20018048
    mikeyjulian@me.com:1402889601:1403494404f:E219F3E1-2669-43B7-B172-31F9AD53199D
    azerat:fallstar@me.com:1402889686:1403509967:mazerat:mazerat:mazerat:mazerat:f0bffa36c4ad18a3893e8777fd34c936:_C5ke:6830D32C-A73A-4FD0-883B-B6962A7BC049
    alym:djrenner@me.com:1402889716:Kalym:kalym:kalym:kalym:"""-3GR":6B5D3486-E305-E311-B9FB-E4115BBB7082
    heExpectorator:jaaronhaskett@me.com:1402889752:“VulgartheStalker”:vulgar-the-stalker:“vulgarthestalker”:theexpectorato
    galya15@me.com:1402889798:(b~p:642273FB-A46D-4DE2-B179-91CFB2D6E0EE
    abeldom@hotmail.com:1402889835:1403494636
    latch:queda@me.com:1402889853:flatch:flatch:flatch
    uddlyCobra:christor@shaw.ca:1402889875:cuddlycobra:cuddlycobra:D31789B7-5A2C-4BAA-9F38-364493693131

    I only need those rows that start with the email

    chris.vancura@me.com:1402889576:DI)d/:134A2FF5-A236-471C-944A-EA3C20018048
    mikeyjulian@me.com:1402889601:1403494404f:E219F3E1-2669-43B7-B172-31F9AD53199D
    galya15@me.com:1402889798:(b~p:642273FB-A46D-4DE2-B179-91CFB2D6E0EE
    abeldom@hotmail.com:1402889835:1403494636
    


  • @nicol-arm said in Extracting the Column with condition:

    I only need those rows that start with the email

    You still haven’t said how you can tell that rotector:lyndennelson_@hotmail.com isn’t a valid email. Per Wiki:Email_address,

    space and special characters "(),:;<>@[] are allowed with restrictions (they are only allowed inside a quoted string, as described in the paragraph below, and in addition, a backslash or double-quote must be preceded by a backslash)

    So they can be part of a valid email address; the SMTP mail system requires that they be quoted if used in the To/From… but there is no such universal/absolute requirement for all systems that store emails; if your CSV (character-separated-value: in this case, apparently colon-separated) database assumes that colons are invalid in email, there is a bug in your database design.

    Assuming you want to perpetuate the falsehood that colons aren’t part of valid email addresses, your solution would be

    • FIND = ^.*?:.*?\@.*(\R|\Z)
    • REPLACE = (empty)
    rotector:lyndennelson_@hotmail.com:1402889569brotector:brotector:brotector:brotector
    chris.vancura@me.com:1402889576:DI)d/:134A2FF5-A236-471C-944A-EA3C20018048
    mikeyjulian@me.com:1402889601:1403494404f:E219F3E1-2669-43B7-B172-31F9AD53199D
    azerat:fallstar@me.com:1402889686:1403509967:mazerat:mazerat:mazerat:mazerat:f0bffa36c4ad18a3893e8777fd34c936:_C5ke:6830D32C-A73A-4FD0-883B-B6962A7BC049
    alym:djrenner@me.com:1402889716:Kalym:kalym:kalym:kalym:"""-3GR":6B5D3486-E305-E311-B9FB-E4115BBB7082
    heExpectorator:jaaronhaskett@me.com:1402889752:“VulgartheStalker”:vulgar-the-stalker:“vulgarthestalker”:theexpectorato
    galya15@me.com:1402889798:(b~p:642273FB-A46D-4DE2-B179-91CFB2D6E0EE
    abeldom@hotmail.com:1402889835:1403494636
    latch:queda@me.com:1402889853:flatch:flatch:flatch
    uddlyCobra:christor@shaw.ca:1402889875:cuddlycobra:cuddlycobra:D31789B7-5A2C-4BAA-9F38-364493693131
    

    becomes

    chris.vancura@me.com:1402889576:DI)d/:134A2FF5-A236-471C-944A-EA3C20018048
    mikeyjulian@me.com:1402889601:1403494404f:E219F3E1-2669-43B7-B172-31F9AD53199D
    galya15@me.com:1402889798:(b~p:642273FB-A46D-4DE2-B179-91CFB2D6E0EE
    abeldom@hotmail.com:1402889835:1403494636
    

    … which appears to be what you want, despite the error in your assumptions.

    That regex matches any that does have a colon before the first @, and deletes the whole row. The (\R|\Z) matches either newline or the end of the file (so it will work even if the uddlyCobra line doesn’t have a newline sequence).



  • @PeterJones
    Peter Jones, thanks a lot
    Solved


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