function indexOf(str, val) {
    if (str.indexOf(val) != -1) {
        return true;
    } else {
        return false;
    }
}

function formatCount(count){
    var counter = parseInt(count)
    if(counter > 100000000){
      return (counter / 100000000).toFixed(1) + '亿'
    }else if(counter > 10000){
      return (counter / 10000).toFixed(1) + '万'
    }else{
      return counter
    }
  }
  
  // 12->12   5->05
  function padLeftZero(str){
    str = str + ''
    return ("00" + str).slice(str.length)
  }
  
  function formatDuration(duration, isMilliseconds) {
    isMilliseconds = isMilliseconds === undefined
    if (isMilliseconds) {
      duration = duration / 1000
    }
  
    var minute = Math.floor(duration / 60)
    var second = Math.floor(duration) % 60
  
    return padLeftZero(minute) + ":" + padLeftZero(second)
  }
  
module.exports = {
    indexOf: indexOf,
    formatCount:formatCount,
    formatDuration:formatDuration
}