full memcache client in under 255 chars (uses dd, sed and nc)

mem(){ { case $1 in st*|[vgid]*) printf "%s " "$@";; *) dd if=$3 2>&1|sed '$!d;/^0/d;s/ .*//;s/^/'"$1"' '"$2"' 1 0 /; r '"$3"'' 2>/dev/null;;esac;printf "\r\nquit\r\n";}|nc -n 127.0.0.1 11211; }
usage: mem memcache-command [arguments] where memcache-command might be: set add get[s] append prepend replace delete incr decr cas stats verbosity version notes: exptime argument is set to 0 (no expire) flags argument is set to 1 (arbitrary)

5
By: argv
2011-06-17 06:39:07

What Others Think

Alas, I don't know much about memcache, but there's a couple of things I can improve. If you give printf one format specifier, e.g. %s, but several arguments, it will reuse the format: printf "%s " a b c displays "a b c" Next, there's a shell abbreviation, in bash at least, for all the parameters: $@ Quote it to keep any whitespace: printf "%s " "$@" Later in the command you use a local variable $a, but you don't alter it, so you may as well use the original $3 (I think). This shortens your command from 235 to 193 bytes. mem(){ { case $1 in st*|[gid]*) printf "%s " "$@";; *) dd if=$3 2>&1|sed '$!d;/^0/d;s/ .*//;s/^/'"$1"' '"$2"' 1 0 /; r '"$3"'' 2>/dev/null;;esac;printf "\r\nquit\r\n";}|nc -n 127.0.0.1 11211; } Now, if you give us some sample data for the dd/sed part of the command, we'll see if we can simplify that.
flatcap · 607 weeks ago
thx flatcap. you're right. i've made your suggested changes, and added another of my own. when i look at this my mind says the original arg3 should be "reset(lost)" when passing through a pipe. habitually, i use local vars to prevent this as i'm typing one-liners that use a pipe. but you're right, it's not necessary here. also the last printf isn't necessary if you're using gnu sed.
argv · 606 weeks and 6 days ago
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Perfecthomepugs · 13 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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