AWK array from split not sorted -

i have (demo) text in variable arttext.

{1}: reporting problems , bugs.  {2}: other freely available awk implementations.  {3}: summary of installation.  {4}: how disable gawk extensions.  {5}: making additions gawk.  {6}: accessing git repository.  {7}: adding code main body of gawk.  {8}: porting gawk new operating system.   {9}: why derived files kept in git repository.  

it 1 variable lines delimited indent.

indent = "\n\t\t\t"; 

i want loop through lines , check in each line.

so split array using indent

split(arttext,lin, indent); 

then loop through array lin

l = 0; (l in lin) {     print "l -- ", l, " lin[l] -- " ,lin[l] ; } 

what lines of arttext beginning in line #4

l --  4  lin[l] --  {3}: summary of installation.  l --  5  lin[l] --  {4}: how disable gawk extensions.  l --  6  lin[l] --  {5}: making additions gawk.  l --  7  lin[l] --  {6}: accessing git repository.  l --  8  lin[l] --  {7}: adding code main body of gawk.  l --  9  lin[l] --  {8}: porting gawk new operating system.   l --  10  lin[l] --  {9}: why derived files kept in git repository.  l --  1  lin[l] --    l --  2  lin[l] --  {1}: reporting problems , bugs.  l --  3  lin[l] --  {2}: other freely available awk implementations.  

(the original text has empty line @ beginning.)

the manual says split function:

the first piece stored in array[1], second piece in array[2], , forth.

how avoid problem?

why happening?

thanks.

in awk, arrays unordered. if happen come out in order, accidental.

in gnu awk, possible control order. example numerical ordering indices, use procinfo["sorted_in"]="@ind_num_asc":

$ awk -v arttext="$(cat file)" 'begin{procinfo["sorted_in"]="@ind_num_asc"; indent="\n\t\t\t"; split(arttext, lin, indent); (l in lin) print "l -- ", l, " lin[l] -- " ,lin[l] ;}' l --  1  lin[l] --  {1}: reporting problems , bugs.  l --  2  lin[l] --  {2}: other freely available awk implementations.  l --  3  lin[l] --  {3}: summary of installation.  l --  4  lin[l] --  {4}: how disable gawk extensions.  l --  5  lin[l] --  {5}: making additions gawk.  l --  6  lin[l] --  {6}: accessing git repository.  l --  7  lin[l] --  {7}: adding code main body of gawk.  l --  8  lin[l] --  {8}: porting gawk new operating system.   l --  9  lin[l] --  {9}: why derived files kept in git repository.  

alternatively, since array indices numerical, can loop numerically, using for (l=1;l<=length(lin);l++) print...:

$ awk -v arttext="$(cat file)" 'begin{indent="\n\t\t\t"; split(arttext, lin, indent); (l=1;l<=length(lin);l++) print "l -- ", l, " lin[l] -- " ,lin[l] ;}' l --  1  lin[l] --  {1}: reporting problems , bugs.  l --  2  lin[l] --  {2}: other freely available awk implementations.  l --  3  lin[l] --  {3}: summary of installation.  l --  4  lin[l] --  {4}: how disable gawk extensions.  l --  5  lin[l] --  {5}: making additions gawk.  l --  6  lin[l] --  {6}: accessing git repository.  l --  7  lin[l] --  {7}: adding code main body of gawk.  l --  8  lin[l] --  {8}: porting gawk new operating system.   l --  9  lin[l] --  {9}: why derived files kept in git repository.  

multi-line versions

the gnu code shown on multiple lines looks like:

awk -v arttext="$(cat file)" ' begin{     procinfo["sorted_in"]="@ind_num_asc"     indent="\n\t\t\t"     split(arttext, lin, indent)     (l in lin)         print "l -- ", l, " lin[l] -- " ,lin[l] }' 

and, alternate code is:

awk -v arttext="$(cat file)" ' begin{     indent="\n\t\t\t"     split(arttext, lin, indent)     (l=1;l<=length(lin);l++)         print "l -- ", l, " lin[l] -- " ,lin[l] }'