javascript - Efficiently convert string based time into milliseconds -

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i given challenge, create function that'd convert string based time milliseconds.

that's string format given:

"hours:minutes:seconds.milliseconds"

so value example need return 3010220.

"0:50:10.220"

the function needs short , 1 lined. i'd love know improve function below didn't pass criteria. how can turned 1 liner?

function tomilliseconds(time){   return time.match(/[0-9]+/g).map(function(val,s,a){     return s != 3 ? +val * ((math.pow(60,a.length - s -2) * 1000)) : +val;   }).reduce(function(a,b){     return a+b;   },0); }

there many different ways.

this shortest way can think of (using es6):

var str = "0:50:10.220";    var ms = (s=>1e3*s[2]+6e4*s[1]+36e5*s[0])(str.split(':'));    console.log(ms);


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