如何从Assoc数组中选择一个随机值，然后显示键和值

Question

Hello I am trying to display a random value key pair separately in a string. I want the value and key to remain together.

charAT = {
         'Flamethrower' : Math.floor(Math.random()*(15-5+1)+5),
         'Headbut' : Math.floor(Math.random()*(5-3+1)+3),
         'Fireblast' : Math.floor(Math.random()*(25-10+1)+10),
         'Tailwhip': 0
     };

Want this but for assoc array

rand = charAT[Math.floor(Math.random() * charAT.length)];

Example Code Wanted

alert('charizard used '+ rand:key + 'and did ' + rand:value + ' damage!')

Wanted Output

charizard used flamethrower and did 12 damage!

Thanks in advance!

Answer 1

You can use Object.keys() to get a array filled with the object property names. So, applying a random index on that array, you can get a random property name, then you can use it to get the random property value desired.

  var charAT = { 'Flamethrower' : Math.floor(Math.random()*(15-5+1)+5), 'Headbut' : Math.floor(Math.random()*(5-3+1)+3), 'Fireblast' : Math.floor(Math.random()*(25-10+1)+10), 'Tailwhip': 0 }; var ix = Math.floor(Math.random() * Object.keys(charAT).length); var rand = Object.keys(charAT)[ix]; alert(rand + ":" + charAT[rand]);