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How to get lines starting with some word from file and if no match get lines starting with another word


How to get lines starting with some word from file and if no match get lines starting with another word

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How to get lines starting with some word from file and if no match get lines starting with another word
Tag : java , By : Jonathan Bernard
Date : December 01 2020, 04:47 PM

Hope that helps You could group your lines by their substring and call the method getOrDefault on the generated map. Assuming that your file contains at least one line beginning with aaa or bbb something like below:
try (Stream<String> stream = Files.lines(Paths.get("test.txt"))) {
    Map<String,List<String>> map =  stream.collect(Collectors.groupingBy(s->s.substring(0, 3)));
    map.getOrDefault("aaa", map.get("bbb")).forEach(System.out::println);            
} 
catch (IOException e) {
}

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how to replace a word starting with certain characters on certain lines?


Tag : unix , By : Cowtung
Date : March 29 2020, 07:55 AM
Hope that helps I am trying to use SED command to replace/remove rs numbers from my file. I have a VCF file: , You can try with this,
Ex:
  sed -i 's/\(^[^#].*\)rs[0-9]\+\( .*\)/\1rs.\2/' test.vcf
   sed -i "/^[^#]/s/rs[0-9]\+/rs./g" test.vcf
  ##reference=file:/hs37d5.fasta

  #rs145599635 C T 153.34 .
  #1 10234  rs145599635 C T 153.34  .
  #CHROM POS ID REF ALT QUAL FILTER INFO FORMAT SC_PCHD5235298

  1 10234  rs145599635 C T 153.34  .

Check for lines in txt file starting with particular word and count the occurences


Tag : vba , By : Arun Thomas
Date : March 29 2020, 07:55 AM
With these it helps I've been trying to check if a given txt file has lines that start with a particular word. I then want to count the number of lines that start with that word. Though I can't quite get it right, I do think I'm somewhat close with the check. Any and all help are much appreciated! Here's my code so far , Robert, use the .ReadLine method on your object variable.
Dim numLines as Long: numLInes = 0
Dim strSearch as string '## the value you're searching for
strSearch = "Steve!"    '## MOdify as needed
Do While Not objfil3.AtEndofStream
    If Left(objfil3.ReadLine, Len(strSearch)) = strSearch Then
        numLines = numLines + 1
    Else:

    End If
Loop
    MsgBox objFil3 & " contains " & numLines & " beginning with " & strSearch

Counting lines starting with a certain word


Tag : linux , By : Diego
Date : March 29 2020, 07:55 AM
like below fixes the issue How to count the number of lines in a text file starting with a certain word? , Try this:-
  awk '/^yourwordtofind/{a++}END{print a}' file

How to KEEP only the last line of consecutive lines starting with the same word?


Tag : bash , By : Ganesh
Date : March 29 2020, 07:55 AM
it helps some times See this thread : How to remove the second line of consecutive lines starting with the same word? , With sed:
sed '/^TITLE/ { :a $! { N; /\nTITLE/ { s/.*\n//; ba; }; }; }' filename
/^TITLE/ {          # if a line begins with TITLE
  :a                # jump label for looping.
   $! {             # unless we hit the end of input (in case the file
                    # ends with title lines)
     N              # fetch the next line
     /\nTITLE/ {    # if it begins with TITLE as well
       s/.*\n//     # remove the first
       ba           # go back to a
     }
   }
 }

sed: how to match lines starting with word but not ending with another word


Tag : sed , By : Longchao Dong
Date : March 29 2020, 07:55 AM
wish help you to fix your issue suppose I want to add the word "end" to each line starting with "start". However if the word "end" is already at the end of the line; no need to add it again. So how do I get from: , Use the following approach:
sed -i '/ end$/! s/^start .*$/& end/' testfile
awk '{print ($1 == "start" && $(NF) != "end") ? $0" end" : $0}' testfile
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