<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[caorya的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/caorya</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; caorya]]></copyright><item><title><![CDATA[python中如何比较简单的把一个列表按指定数目分成多个列表？比如[1,2,3,4,5,6,7,8,9,10]分成[1,2,3][4,5,6][7,8,9][10]]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/128424454</link><guid>https://blog.youkuaiyun.com/caorya/article/details/128424454</guid><author>caorya</author><pubDate>Fri, 23 Dec 2022 21:28:50 +0800</pubDate><description><![CDATA[【代码】python中如何比较简单的把一个列表按指定数目分成多个列表？比如[1,2,3,4,5,6,7,8,9,10]分成[1,2,3][4,5,6][7,8,9][10]]]></description><category></category></item><item><title><![CDATA[flask 主线程返回，新线程来进行耗时任务的执行]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/118700537</link><guid>https://blog.youkuaiyun.com/caorya/article/details/118700537</guid><author>caorya</author><pubDate>Tue, 13 Jul 2021 15:24:55 +0800</pubDate><description><![CDATA[项目中遇到需求，前端返回结果，后端进行比较耗时的操作。例如判断某客户ID是否在远程数据库。根据ID查询远程数据库，如果不存在，在前端提示客户不存在；如果存在，则前端提示客户存在，后端将根据客户ID，查询远程数据库的其他表，并将查询到的信息插入到本地数据库。

本来没有想到多线程，只想着如何在return返回给前端信息之后再进行耗时操作，但在后端试了很多方法，都不能实现效果。后面又想到在前端click事件上增加一个新方法，虽然功能实现了，但前端同学表示，并不想增加新方法，而且个人觉得这样实现很别扭。

随后想]]></description><category></category></item><item><title><![CDATA[2021-07-06 解决异常：“The last packet sent successfully to the server was 0 milliseconds ago. ”]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/118522883</link><guid>https://blog.youkuaiyun.com/caorya/article/details/118522883</guid><author>caorya</author><pubDate>Tue, 06 Jul 2021 16:07:00 +0800</pubDate><description><![CDATA[url: jdbc:mysql://192.168.124.123:3306/xxgcxy?useUnicode=true&amp;characterEncoding=utf-8&amp;serverTimezone=UTC&amp;zeroDateTimeBehavior=CONVERT_TO_NULL


改为



url: jdbc:mysql://192.168.124.123:3306/xxgcxy?useSSL=false&amp;useUnicode=true&amp;characterE.]]></description><category></category></item><item><title><![CDATA[SQL语句 显示当前数据库所有表名]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/118369970</link><guid>https://blog.youkuaiyun.com/caorya/article/details/118369970</guid><author>caorya</author><pubDate>Wed, 30 Jun 2021 21:34:36 +0800</pubDate><description><![CDATA[select table_name from information_schema.tables where table_schema=database();

输入此代码即可查到本数据库的所有表名。




]]></description><category></category></item><item><title><![CDATA[Hadoop和Hbase版本对应关系2020.10.21]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/109204170</link><guid>https://blog.youkuaiyun.com/caorya/article/details/109204170</guid><author>caorya</author><pubDate>Wed, 21 Oct 2020 16:28:27 +0800</pubDate><description><![CDATA[来源http://hbase.apache.org/book.html#configuration
]]></description><category></category></item><item><title><![CDATA[rails 创建后台]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/97133054</link><guid>https://blog.youkuaiyun.com/caorya/article/details/97133054</guid><author>caorya</author><pubDate>Wed, 24 Jul 2019 15:02:15 +0800</pubDate><description><![CDATA[以company为例


rails g model company


rails g controller setting/companies

打开companies_controller.rb，加入active_scaffold


class Super::CompaniesController &lt; ApplicationController

  active_scaffold ...]]></description><category></category></item><item><title><![CDATA[Ruby 变量]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/94598904</link><guid>https://blog.youkuaiyun.com/caorya/article/details/94598904</guid><author>caorya</author><pubDate>Thu, 04 Jul 2019 10:48:58 +0800</pubDate><description><![CDATA[irb(main):001:0&gt; person1 = "Tim"
=&gt; "Tim"
irb(main):002:0&gt; person2 = person1
=&gt; "Tim"
irb(main):003:0&gt; person1[0]='J'
=&gt; "J"
irb(main):004:0&gt; person1
=&gt; "Jim"
irb(main):005:0&...]]></description><category></category></item><item><title><![CDATA[Ruby 类变量和实例变量]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/94594811</link><guid>https://blog.youkuaiyun.com/caorya/article/details/94594811</guid><author>caorya</author><pubDate>Thu, 04 Jul 2019 10:39:17 +0800</pubDate><description><![CDATA[类变量和实例变量



类变量也叫静态变量，被类的所有对象所共享，与类方法相关联，类变量由两个@符开头，例如@@count，类变量在使用前必须被初始化；实例变量也叫对象变量。

区别：类变量是全部对象所共有的，其中一个对象将它的值改变，其他对象得到的就是改变后的结果。实例变量则属于对象私有，其中一个对象将其改变，不会影响到其他对象。

类方法

有时，类需要提供不束缚与任何特定对象的方法，就用到...]]></description><category></category></item><item><title><![CDATA[Rails Ransack搜索条件字段定义]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/94594295</link><guid>https://blog.youkuaiyun.com/caorya/article/details/94594295</guid><author>caorya</author><pubDate>Thu, 04 Jul 2019 09:15:11 +0800</pubDate><description><![CDATA[输入框定义时：


&lt;%= text_field_tag "search[title_cont]", "", placeholder: "", class: "form-control form-min-control jq_search" %&gt;

1、search[搜索的字段名]
2、class属性中必须增加'jq_search'
3、按某个字段搜索表中数据时，如字段为：title,...]]></description><category></category></item><item><title><![CDATA[rails 数据库删除重建]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/94553824</link><guid>https://blog.youkuaiyun.com/caorya/article/details/94553824</guid><author>caorya</author><pubDate>Wed, 03 Jul 2019 10:59:57 +0800</pubDate><description><![CDATA[rake db:drop
rake db:create
rake db:migrate

数据库删除重建和迁移
]]></description><category></category></item><item><title><![CDATA[flutter scaffold弹出键盘报异常]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/93850703</link><guid>https://blog.youkuaiyun.com/caorya/article/details/93850703</guid><author>caorya</author><pubDate>Thu, 27 Jun 2019 10:39:11 +0800</pubDate><description><![CDATA[return Scaffold(
          appBar: new AppBar(centerTitle: true, title: new Text('登录')),
          body: Container(...)
          resizeToAvoidBottomPadding: false,
);





resizeToAvoidBottomPaddin...]]></description><category></category></item><item><title><![CDATA[flutter 传图]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/93842498</link><guid>https://blog.youkuaiyun.com/caorya/article/details/93842498</guid><author>caorya</author><pubDate>Thu, 27 Jun 2019 08:41:42 +0800</pubDate><description><![CDATA[FormBuilderCustomField(
                    attribute: "file",
                    validators: [
                      FormBuilderValidators.required(),
                    ],
                    for...]]></description><category></category></item><item><title><![CDATA[Flutter 页面跳转及传值]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/92837926</link><guid>https://blog.youkuaiyun.com/caorya/article/details/92837926</guid><author>caorya</author><pubDate>Wed, 19 Jun 2019 17:18:33 +0800</pubDate><description><![CDATA[本文实现了页面跳转，在跳转过程中传值给下一个页面并返回到之前页面。

文中使用了三个文件，包括两个页面和一个数据文件。

数据文件listData.dart


List listData=[
  {
    "patrol_plan_name": 'TSD-8351',
    "address": '郑州大学与文化路交叉口向南100米',
    "remainder_days": '5天'
...]]></description><category></category></item><item><title><![CDATA[flutter 将图片裁剪为圆形]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/92796670</link><guid>https://blog.youkuaiyun.com/caorya/article/details/92796670</guid><author>caorya</author><pubDate>Tue, 18 Jun 2019 17:34:42 +0800</pubDate><description><![CDATA[1. 第一种方式，将头像变为圆形格式


//将角度变为圆形
child:Container(
        width: 300,
        height: 300,
        decoration: BoxDecoration(
          color:Colors.yellow,
          borderRadius: BorderRadius.all(
   ...]]></description><category></category></item><item><title><![CDATA[flutter学习]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/92760388</link><guid>https://blog.youkuaiyun.com/caorya/article/details/92760388</guid><author>caorya</author><pubDate>Tue, 18 Jun 2019 09:10:21 +0800</pubDate><description><![CDATA[main.dart是flutter的入口文件

main.dart里面的内容


import 'package:flutter/material.dart';

void main(){
  runApp(MyApp());
}

也可简写为


void main() =&gt; runApp(MyApp());

在dart中实例化类的new可以省略


void main(){
  run...]]></description><category></category></item><item><title><![CDATA[Xpath判断某个属性是否包含或不包含指定的属性或值]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/81839928</link><guid>https://blog.youkuaiyun.com/caorya/article/details/81839928</guid><author>caorya</author><pubDate>Sun, 19 Aug 2018 17:49:35 +0800</pubDate><description><![CDATA[结合Xpath路径来提取循环列表中的一个HTML标签的InnerText，提取的时候需要判断是这个标签的class属性是否包含某个指定的属性值，利用Xpath的contains可以解决，代码如下：


//选择不包含class属性的节点
var result = node.SelectNodes(&quot;.//span[not(@class)]&quot;);
//选择不包含class和id属性的节点
var r...]]></description><category></category></item><item><title><![CDATA[python爬虫爬取百度贴吧帖子]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/80318262</link><guid>https://blog.youkuaiyun.com/caorya/article/details/80318262</guid><author>caorya</author><pubDate>Tue, 15 May 2018 11:15:33 +0800</pubDate><description><![CDATA[最近学习python，就利用python做一个简单的爬虫项目巩固自己学习的知识。本人实现的思路：1. 取得包含帖子主题的全部页面；2. 从页面中提取帖子URL保存到队列中，每个URL就是一个帖子；3. 从队列中依次提取URL，获取帖子中的内容。具体实现：首先，获取页面的全部内容。本来我使用的是urllib，后面换成了requests，个人感觉这个模块方便了很多。def getPageAllCont...]]></description><category></category></item><item><title><![CDATA[Python3 urllib.request读取带中文的链接]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/80292221</link><guid>https://blog.youkuaiyun.com/caorya/article/details/80292221</guid><author>caorya</author><pubDate>Sat, 12 May 2018 16:15:24 +0800</pubDate><description><![CDATA[两种方法，一种是将中文单独拿出进行处理，然后进行字符串拼接；另一种是直接对链接进行修改。第一种方法，将中文单独拿出# -*- coding:utf-8 -*-

from urllib.parse import quote

url = 'http://www.example.com/api.php?text=中文在这里'

x = '中文在这里'
x = quote(x)
print(x)
y ...]]></description><category></category></item><item><title><![CDATA[python_使用matplotlib画饼状图（pie）]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/79946614</link><guid>https://blog.youkuaiyun.com/caorya/article/details/79946614</guid><author>caorya</author><pubDate>Sun, 15 Apr 2018 09:21:24 +0800</pubDate><description><![CDATA[代码与详细注释from matplotlib import pyplot as plt 

#调节图形大小，宽，高
plt.figure(figsize=(6,9))
#定义饼状图的标签，标签是列表
labels = [u'第一部分',u'第二部分',u'第三部分']
#每个标签占多大，会自动去算百分比
sizes = [60,30,10]
colors = ['red','yellowgreen...]]></description><category></category></item><item><title><![CDATA[matplotlib图例中文乱码 MAC解决方法]]></title><link>https://blog.youkuaiyun.com/caorya/article/details/79946572</link><guid>https://blog.youkuaiyun.com/caorya/article/details/79946572</guid><author>caorya</author><pubDate>Sun, 15 Apr 2018 09:18:33 +0800</pubDate><description><![CDATA[本人小白，第一次用matplotlib画图，结果做出图片的中文部分显示方框，看了下文档，发现标题部分可以通过设置字体属性解决，但是图例不支持设置字体，然后开始在网上寻找解决方法，终于找到了对本人有用的。原文链接Pyhton版本 3.6 ， 系统MacOS1、下载中文字体（黑体，看准系统版本）SimHei - Free Font Download​www.fontpalace.com2、解压之后在系...]]></description><category></category></item></channel></rss>