This is odd, and annoying. CentOS 6, current. Here's my awk script:
{ room = substr($0, 48, 10); arr[$2,room,$1] = $0; } END { for ( i in arr ) { for ( j in arr[i] ) { for ( k in arr[i][j] ) { print arr[i][j][k]; } } } }
And when I run it, it complains awk -f awksort proplist7 awk: awksort:7: for ( j in arr[i] ) { awk: awksort:7: ^ syntax error awk: awksort:8: for ( k in arr[i,j] ) { awk: awksort:8: ^ syntax error awk: awksort:9: print arr[i][j][k]; awk: awksort:9: ^ syntax error
which makes no sense - I've done this a million times. Am I missing something, or is this a bug?
mark
On Fri, Apr 29, 2016 at 10:31:51AM -0400, m.roth@5-cent.us wrote:
This is odd, and annoying. CentOS 6, current. Here's my awk script:
{ room = substr($0, 48, 10); arr[$2,room,$1] = $0; } END { for ( i in arr ) { for ( j in arr[i] ) { for ( k in arr[i][j] ) { print arr[i][j][k]; } } } }
Note the last sentence in this paragraph from the gawk manpage:
The in construct may also be used in a for loop to iterate over all the elements of an array. However, the (i, j) in array construct only works in tests, not in for loops.
jl
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On 29/04/16 18:14, Jon LaBadie wrote:
On Fri, Apr 29, 2016 at 10:31:51AM -0400, m.roth@5-cent.us wrote:
This is odd, and annoying. CentOS 6, current. Here's my awk script:
{ room = substr($0, 48, 10); arr[$2,room,$1] = $0; } END { for ( i in arr ) { for ( j in arr[i] ) { for ( k in arr[i][j] ) { print arr[i][j][k]; } } } }
Note the last sentence in this paragraph from the gawk manpage:
The in construct may also be used in a for loop to iterate over all the elements of an array. However, the (i, j) in array construct only works in tests, not in for loops.
jl
I modelled your problem, just changing line 2 to "room = $3". The data file was: 1 2 3 4 5 6 7 8 9
The problem is in the line ( i in arr ). i will be "1SUBSEP2SUBSEP3", which makes a nonsense of the rest of the code.
Using
END { for ( a in arr ) { split( a, a2, SUBSEP ) print a2[1], a2[2], a2[3] } }
I get a sensible output. You'll have to take it from here.
-
J Martin Rushton -
Jon LaBadie -
m.roth＠5-cent.us