Re: Pattern to match element in nested list
- To: mathgroup at smc.vnet.net
- Subject: [mg122852] Re: Pattern to match element in nested list
- From: "Dr. Wolfgang Hintze" <weh at snafu.de>
- Date: Sat, 12 Nov 2011 07:35:28 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <j9irl5$8ee$1@smc.vnet.net>
"JasonE" <ebaughjason at gmail.com> schrieb im Newsbeitrag news:j9irl5$8ee$1 at smc.vnet.net... > This is pretty basic and I am surprised at myself that I can't figure > this out, but I guess its where I am at. > > What pattern would pick students with a score of zero out of this > list > (which is {"student", score}): > > {{"Smith, Tim",3},{"Wheres,Waldo",4},{"Muffet, LilMiss",0},{"Brown, > Charlie",1},{"X, Doctor",0}} > > > > Thanks, > Jason > > Contact: jasonebaugh at jasonebaugh.info > Blog: www.jasonebaugh.info/wordpress/ > LinkedIn: www.linkedin.com/in/jasonebaugh > Something like this: t = {{"Smith, Tim", 3}, {"Wheres,Waldo", 4}, {"Muffet, LilMiss", 0}, {"Brown, Charlie", 1}, {"X, Doctor", 0}} {{"Smith, Tim", 3}, {"Wheres,Waldo", 4}, {"Muffet, LilMiss", 0}, {"Brown, Charlie", 1}, {"X, Doctor", 0}} Cases[t, {_, 0}] {{"Muffet, LilMiss", 0}, {"X, Doctor", 0}} Regards, Wolfgang