俺流 sprintf 関数を作る

const 
  sprintf = (...args)=>{
    let j=1;return args[0].replace (/\%(?:(\d+)\$)?(?:\'(.))?(0)?([1-9]|[1-9][0-9]*)?([ds])/g,(_,i=j++,c=" ",z=c,l=0,t,u,v,s=''+args[i])=>s.padStart(Math.max(l,s.length),z))
  };