|
Server : Apache/2.4.18 (Ubuntu) System : Linux canvaswebdesign 3.13.0-71-generic #114-Ubuntu SMP Tue Dec 1 02:34:22 UTC 2015 x86_64 User : oppastar ( 1041) PHP Version : 7.0.33-0ubuntu0.16.04.15 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority, Directory : /usr/share/doc/gawk/examples/prog/ |
Upload File : |
# anagram.awk --- An implementation of the anagram-finding algorithm
# from Jon Bentley's "Programming Pearls," 2nd edition.
# Addison Wesley, 2000, ISBN 0-201-65788-0.
# Column 2, Problem C, section 2.8, pp 18-20.
#
# This program requires gawk 4.0 or newer.
# Required gawk-specific features:
# - True multidimensional arrays
# - split() with "" as separator splits out individual characters
# - asort() and asorti() functions
#
# See http://savannah.gnu.org/projects/gawk.
#
# Arnold Robbins
# arnold@skeeve.com
# Public Domain
# January, 2011
/'s$/ { next } # Skip possessives
{
key = word2key($1) # Build signature
data[key][$1] = $1 # Store word with signature
}
# word2key --- split word apart into letters, sort, and join back together
function word2key(word, a, i, n, result)
{
n = split(word, a, "")
asort(a)
for (i = 1; i <= n; i++)
result = result a[i]
return result
}
END {
sort = "sort"
for (key in data) {
# Sort words with same key
nwords = asorti(data[key], words)
if (nwords == 1)
continue
# And print. Minor glitch: trailing space at end of each line
for (j = 1; j <= nwords; j++)
printf("%s ", words[j]) | sort
print "" | sort
}
close(sort)
}