function toFixedFix (n,prec){
    var k=Math.pow(10,prec);
    return''+(Math.round(n*k)/k).toFixed(prec);
  }

export function formatNumber (number,decimals,dec_point,thousands_sep){
  number=(number+'').replace(/[^0-9+\-Ee.]/g,'');
  const n=!isFinite(+number)?0:+number;
  const prec=!isFinite(+decimals)?0:Math.abs(decimals);
  const sep=(typeof thousands_sep==='undefined')?',':thousands_sep;
  const dec=(typeof dec_point==='undefined')?'.':dec_point;
  let s='';

  s=(prec?toFixedFix(n,prec):''+Math.round(n)).split('.');
  if(s[0].length>3){
    s[0]=s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g,sep);
  }
  if((s[1]||'').length<prec){
    s[1]=s[1]||'';
    s[1]+=new Array(prec-s[1].length+1).join('0');
  }
  return s.join(dec);
};