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apply_unix_commands_to_all_but_the_first_line [2022/08/12 13:39] – [Practical solution] rajuapply_unix_commands_to_all_but_the_first_line [2022/08/12 15:16] – [How I came across it] raju
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 ==== How I came across it ==== ==== How I came across it ====
 I came across it while reading the book "Data Science at the Command Line" (2nd Edition) by Jeroen Janssens (https://smile.amazon.com/Data-Science-Command-Line-Explore/dp/1492087912). The book is available for free at https://datascienceatthecommandline.com/2e/ . The 'body' and 'header' commands are discussed in https://datascienceatthecommandline.com/2e/chapter-5-scrubbing-data.html#bodies-and-headers-and-columns-oh-my . I came across it while reading the book "Data Science at the Command Line" (2nd Edition) by Jeroen Janssens (https://smile.amazon.com/Data-Science-Command-Line-Explore/dp/1492087912). The book is available for free at https://datascienceatthecommandline.com/2e/ . The 'body' and 'header' commands are discussed in https://datascienceatthecommandline.com/2e/chapter-5-scrubbing-data.html#bodies-and-headers-and-columns-oh-my .
 +
 +==== Close but no cigar ====
 +Here I will try to list some alternative approaches that are close but not perfect.
 +
 +Solution 1:
 +<code>
 +$ cat input.txt
 +value
 +8
 +2
 +6
 +3
 +
 +$ (head -n 1 input.txt; tail -n +2 input.txt | sort)
 +value
 +2
 +3
 +6
 +8
 +</code>
 +
 +Disadvantages:
 +  * Requires two passes on the input (once to extract the header and another to process the body)
 +  * Does not work if the input is coming from stdin
  
apply_unix_commands_to_all_but_the_first_line.txt · Last modified: 2022/08/12 17:29 by raju