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不知道算什么分类笔记

Q.XmlHttpRequest的Promise应用封装:

  简单的应用封装示例:

  

function Req(url, method, data)
{
  let inner = function (resolve, reject)
  {
    let req = new XMLHttpRequest();

    req.onload = ()=>
    {
      resolve( req.response);
    };

    req.onerror = ()=>
    {
      reject(req.error);
    };

    req.open(method, url, true);
    req.send(data);
  };

  let promise = new Promise(inner);
  return promise;
}

Req(`https://www.baidu.com/`, `get`)
.then((data)=>
{
  console.log('success : ', data);
})
.catch((error)=>
{
  console.error('error : ', error);
});

 

 

Q.毛发算法 fur algorithm:

http://www.xbdev.net/directx3dx/specialX/Fur/

 

Q.Chrome调试安卓机Web页面

chrome://inspect/#devices 

 

Q:VS下C#和C++ Region的使用

  Region(代码段折叠)属于VS的预处理指令,留个地址方便以后定位

  C++ 预处理 Doc:https://docs.microsoft.com/en-us/cpp/preprocessor/pragma-directives-and-the-pragma-keyword?view=vs-2019

  C# 预处理 Doc:https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives/

 

 

   C#:

    #region 缩放代码段

    #endregion

   c++:

#pragma region 缩放代码段
#pragma endregion

 

Q:/C++ VS 忽略错误或警告:

#if defined(_MSC_VER)
#pragma warning(disable : 4054)
#pragma warning(disable : 4055)
#pragma warning(disable : 4100)
#pragma warning(disable : 4127)
#pragma warning(disable : 4130)
#pragma warning(disable : 4152)
#pragma warning(disable : 4189)
#pragma warning(disable : 4206)
#pragma warning(disable : 4210)
#pragma warning(disable : 4232)
#pragma warning(disable : 4244)
#pragma warning(disable : 4305)
#pragma warning(disable : 4306)
#pragma warning(disable : 4668)
#pragma warning(disable : 4702)
#pragma warning(disable : 4706)
#endif /* defined(_MSC_VER) */

 

 

Q:VS Code Json文件报错:Comments are notpermitted in JSON.(521):

解决:

 

 

Q:JS抓包练习:Web京东 分类导航菜单目录Tree转CSV 

 属性结构,字符串存成.csv就OK

var csv = '';
$('.cate_menu_item').each((i,v)=> 
{
    var row ='';
    $(v).find('a').each((ii,vv)=>
    {
        if (row == '')
        {
            row += vv.text;
        }
        else 
        {
            row += ',' + vv.text;
        }
    });

    var details = $('#cate_item' + (i  + 1) ).find('.cate_detail_item');
    var temp1 ='';
    $(details).each((iii,vvv)=>
    {
        var title = $(vvv).find('.cate_detail_tit_lk');
        $(title).find('i').remove();

        
        if (temp1 == '')
        {
            temp1 +=  ',' + title.html() + '\n';
        }
        else 
        {
            temp1 += '\n,' + title.html()+ '\n';
        }
        
        temp1+= ',';
        $(vvv).find('.cate_detail_con_lk').each((iiii,vvvv)=>
        {
            temp1 += "," + $(vvvv).html();
        });
        
    });     

    //console.log(temp1);
    csv += '\n' + row;
    csv += '\n' + temp1;

});
    
console.log(csv);

 

posted @ 2019-04-08 17:00  林清  阅读(246)  评论(0编辑  收藏  举报