Dart
Dart
HTML Canvas
HTML Canvas
Redis
Redis
Bash
Bash
JavaScript
JavaScript
Awk

Awk program examples

awk 'BEGIN {print "hello world"}'        # Prints "hello world"
awk -F: '{print $1}' /etc/passwd         # -F: Specify field separator
# /pattern/ Execute actions only for matched pattern
awk -F: '/root/ {print $1}' /etc/passwd                     
# BEGIN block is executed once at the start
awk -F: 'BEGIN { print "uid"} { print $1 }' /etc/passwd     
# END block is executed once at the end
awk -F: '{print $1} END { print "-done-"}' /etc/passwd
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