Re: printing words without newlines?

On 12.05.2024 06:57, David Chmelik wrote:

I'm learning more AWK basics and wrote function to read file, sort,
print.  I use GNU AWK (gawk) and its sort but printing is harder to get
working than anything... separate lines work, but when I use printf() or
set ORS then use print (for words one line) all awk outputs (on FreeBSD
UNIX 14 and Slackware GNU/Linux 15) is a space (and not even newline
before shell prompt)... is this normal (and I made mistake?) or am I
approaching it wrong?  I recall BASIC prints new lines, but as I learned
basic C and some derivatives, I'm used to newlines only being specified...

IIUC you meanwhile have your script running, and probably code similar
to

    BEGIN { print_file_words("data.txt"); }

    function print_file_words(file) {
        while (getline <file >0)
            arr[$1] = $0
        PROCINFO["sorted_in"] = "@ind_num_asc"
        for (i in arr) {
            split (arr[i], arr2)
            printf "%s ", arr2[2]
        }
        printf "\n"
    }

I suggest to add the '>0' test to your code, and also print a final
"\n" so that your command line prompt doesn't overwrite your output.
Note also that printf (like print) is a command, no function. Adding
local variable declarations is also sensible to not get problems if
you operate your code in other source code contexts.

Janis

------------------------------------------------------------------------
# print_file_words.awk
# pass filename to function
BEGIN { print_file_words("data.txt"); }
 
# read two-column array from file and sort lines and print
function print_file_words(file) {
# set record separator then use print
# ORS=" "
  while(getline<file) arr[$1]=$0
  PROCINFO["sorted_in"]="@ind_num_asc"
  for(i in arr)
  {
    split(arr[i],arr2)
    # output all words or on one line with ORS
    print arr2[2]
    # output all words on one line without needing ORS
    #printf("%s ",arr2[2])
  }
}
------------------------------------------------------------------------
# sample data.txt
2 your
1 all
3 base
5 belong
4 are
7 us
6 to