function seqSearch(data,arr) {
  for(var i = 0; i < arr.length; ++i) {
    if(arr[i] == data) {
      return true;
    }
  }
  return false;
}

function seqSearch(data,arr) {
  for(var i = 0; i < arr.length; ++i) {
    if(arr[i] == data) {
      return i;
    }
  }
  return -1;
}

function findMin(arr) {
  var min = arr[0];
  for(var i = 1; i < arr.length; ++i) {
    if(arr[i] < min) {
      min = arr[i];
    }
  }
  return min;
}

function findMax(arr) {
  var max = arr[0];
  for(var i = 1; i < arr.length; ++i) {
    if(arr[i] > max) {
      max = arr[i];
    }
  }
  return max;
 }

// 二分查找算法
function binSearch(data,arr) {
var lowerBound = 0;
  var upperBound = arr.length - 1;
  while(lowerBound <= upperBound) {
    var mid = Math.floor((upperBound + lowerBound)/2);
    if(arr[mid] < data) {
      lowerBound = mid + 1;
    }else if(arr[mid] > data) {
      upperBound = mid - 1;
    }else {
      return mid;
    }
  }
  return -1;
}
 // 快速排序
function qSort(list) {
  if(list.length == 0) {
    return [];
  }
  // 存储小于基准值的值
  var left = [];
  // 存储大于基准值的值
  var right = [];
  var pivot = list[0];
  for(var i = 1; i < list.length; i++) {
    if(list[i] < pivot) {
      left.push(list[i]);
    }else {
      right.push(list[i])
    }
  }
  return qSort(left).concat(pivot,qSort(right));
}
 // 测试代码
var numbers = [0,9,1,8,7,6,2,3,5,4];
var list = qSort(numbers);
console.log(binSearch(6,list));

// 计算重复次数
function count(data,arr) {
  var count = 0;
  var arrs = [];
  var position = binSearch(data,arr);
  if(position > -1) {
    ++count;
    arrs.push({"index":count});
    for(var i = position -1; i > 0; --i) {
      if(arr[i] == data) {
        ++count;
        arrs.push({"index":count});
      }else {
        break;
      }
    }
    for(var i = position + 1; i < arr.length; ++i) {
      if(arr[i] == data) {
        ++count;
        arrs.push({"index":count});
      }else {
        break;
      }
    }
  }
  return arrs;
}
 // 测试重复次数的代码
var arr = [0,1,1,1,2,3,4,5,6,7,8,9];
var arrs = count(1,arr);
console.log(arrs);
console.log(arrs.length);