function inArray(arr, key, val) {
  if (!arr || !arr.length || typeof arr != 'object' || !Array.isArray(arr)) {
    return -1
  }
  for (let i = 0; i < arr.length; i++) {
    if (!key) {
      if (arr[i] == val) {
        return i
      }
    } else if (arr[i][key] === val) {
        return i
    }
  }
  return -1;
}

// ArrayBuffer转16进度字符串示例
function ab2hex(buffer, split) {
  var hexArr = Array.prototype.map.call(
    new Uint8Array(buffer),
    function (bit) {
      return ('00' + bit.toString(16)).slice(-2)
    }
  )
  return hexArr.join(split);
}

const {TextDecoder, TextEncoder} = require('./encoding')

function hex2str(arr) {
  let decoder = new TextDecoder('utf8')
  let uint8 = new Uint8Array(arr)
  let res = decoder.decode(uint8)
  return res
}

function str2hex(str) {
  let encoder = new TextEncoder('utf8')
  return encoder.encode(str)
}

module.exports = {
  inArray,
  ab2hex,
  hex2str,
  str2hex,
}