When is BEGIN required in awk?
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The following commands yield the same answer:
tail -n 1 ~/watchip.sh.csv | awk 'BEGIN { FS = "," } ; { print $1 }'
tail -n 1 ~/watchip.sh.csv | awk '{ FS = "," } ; { print $1 }'
I'm not an experienced awk user, but trying to get a better handle on it through usage & reading the documentation. But everything I've read on BEGIN and END is fuzzy (makes little sense to me). Perhaps this is because I have only used awk in very limited situations.
Can someone explain briefly when a BEGIN statement would be required in awk? A pointer to a good primer wouod also be appreciated.
awk
asked 5 mins ago
SeamusSeamus
245112
add a comment |
The following commands yield the same answer:
tail -n 1 ~/watchip.sh.csv | awk 'BEGIN { FS = "," } ; { print $1 }'
tail -n 1 ~/watchip.sh.csv | awk '{ FS = "," } ; { print $1 }'
I'm not an experienced awk user, but trying to get a better handle on it through usage & reading the documentation. But everything I've read on BEGIN and END is fuzzy (makes little sense to me). Perhaps this is because I have only used awk in very limited situations.
Can someone explain briefly when a BEGIN statement would be required in awk? A pointer to a good primer wouod also be appreciated.
awk
asked 5 mins ago
SeamusSeamus
245112
add a comment |
The following commands yield the same answer:
tail -n 1 ~/watchip.sh.csv | awk 'BEGIN { FS = "," } ; { print $1 }'
tail -n 1 ~/watchip.sh.csv | awk '{ FS = "," } ; { print $1 }'
I'm not an experienced awk user, but trying to get a better handle on it through usage & reading the documentation. But everything I've read on BEGIN and END is fuzzy (makes little sense to me). Perhaps this is because I have only used awk in very limited situations.
Can someone explain briefly when a BEGIN statement would be required in awk? A pointer to a good primer wouod also be appreciated.
awk
asked 5 mins ago
SeamusSeamus
245112
The following commands yield the same answer:
tail -n 1 ~/watchip.sh.csv | awk 'BEGIN { FS = "," } ; { print $1 }'
tail -n 1 ~/watchip.sh.csv | awk '{ FS = "," } ; { print $1 }'
I'm not an experienced awk user, but trying to get a better handle on it through usage & reading the documentation. But everything I've read on BEGIN and END is fuzzy (makes little sense to me). Perhaps this is because I have only used awk in very limited situations.
Can someone explain briefly when a BEGIN statement would be required in awk? A pointer to a good primer wouod also be appreciated.
awk
awk
asked 5 mins ago
SeamusSeamus
245112
asked 5 mins ago
SeamusSeamus
245112
asked 5 mins ago
SeamusSeamus
245112
asked 5 mins ago
SeamusSeamus
245112
asked 5 mins ago
SeamusSeamus
245112
245112
add a comment |
add a comment |
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