How do I check if a bytes32 variable in a mapping has been assigned value?

Dancing tonight…If you enjoy my photos, you are welcome to #‎donate #‎bitcoin to me at: 1Q2LV3bsxZjRBQoRXAXikpUGPCrNeGSUWcBy antwerpenR on 2013-09-21 19:42:20[wpr5_ebay kw=”bitcoin” num=”1″ ebcat=”” cid=”5338043562″ lang=”en-US” country=”0″ sort=”bestmatch”]

bitcoin: Swing-Setup! Short down to 3k?'Market is a mess!#Chance Hey tradomaniacs, welcome to another free signal! Important: MARKET is a manipulated mess! No liquidity = hard volatility! Make sure to place a sell-limit after the […]