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Recent questions in Technique[技术]

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jekyll - Github page blog: html works ok but css and images are 404

I have my blog kray.me hosted on github pages for many years now. There are others questions related to 404 errors ... me/public/img/back.jpg Any help would be greatly appreciated....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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怎么把 [{key:"a",value:"1"}]转换成{"a":"1"}

怎么把 [{key:"a",value:"1"},{key:"b",value:"2"}]转换成{"a":"1","b":"2"}...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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529 views

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关于GET 请求会被浏览器主动缓存下来，留下历史记录问题

关于get和post的区别中有一条为：从缓存的角度，GET 请求会被浏览器主动缓存下来，留下历史记录，而 POST 默认不会。我在我的项目中调用了多次同一个get接口但是历史记录中只有一次在页面中这些get接口都是同一页的不同tab栏为什么我调用get请求没有生成多条历史记录呢？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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235 views

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为什么bank对象的状态没有被改变？

public class ThreadBySync { public static void main(String[] args) { Bank bank = new Bank("n1",100); Person p = new Person(bank); new ... =" + name + ", money=" + money + "]"; } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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447 views

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子组件传参给父组件，父组件中一直没有响应怎么办？

这是子组件的传参事件 methods: { imgs_click () { var that=this; this.$axios.get('http://localhost/class/imgl?ID='+that.imgsrc.ID) .then(function(res){ ... 来且完整的想了一个下午还是没弄出来请问各位大神这是什么原因？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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206 views

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excel - To make sub-group and find its local maximum value

I'm trying to calculate values in "AQ" Column which are taken from column "AN" as per arrow direction in column " ... End If Next I End With Application.EnableEvents = True End Sub...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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176 views

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python - For col in cols then conditional

This part of the code reads some files, and then its columns on cols, then, if the word "SOURCE" is in cols, i need ... '] = f df_xlsx = pd.concat([df, df_xlsx], ignore_index=True)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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redis 的发布订阅模式，底层是用 list 实现的么？

底层的数据结构...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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307 views

1 answer

浏览器端如何区分普通对象和文件对象

业务需要封装一个请求函数, 根据传入该函数的内容是否含有文件,来设置相应的contentType,为对象时需要设置为multipart/form-data, 伪代码: request(payload){ for( ... === 'wenjian'){ headers['Content-Type'] = 'multipart/form-data' } } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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451 views

1 answer

javascript - Three js canvas blurry

How do I produce a better resolution? At the moment it is very blurry. I'm animating a cube that disassembles ... the link: https://jsfiddle.net/Saladmaster/697e5trx/ Thank you...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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ts 类型提取问题

如何修改第三行返回的类型，使 result 拥有 age: number 同时现有的返回的类型也还要在...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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524 views

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请问秒杀页面中如何隐藏下单URL？

看了写URL动态化的博客，思路是步骤1：将真实URL隐藏，未开启秒杀前请求的是获取URL接口步骤2：开启秒杀后获取到MD5加密后的真实URL，之后再次访问真实秒杀URL 但是获取到真实秒杀URL后还是可以用机器模拟，且步骤1到步骤2的自动化转换也可以机器模拟，那么隐藏URL的意义是？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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210 views

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javascript - How to get data from store?

How to get data from vuex store with vuejs? Here is my code: index.js Vue.use(Vuex); export default new Vuex ... from vuex store on different vue file/template? Thanks for any help...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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134 views

1 answer

node.js - Constant Array in JavaScript

How can I keep an array of constants in JavaScript? And likewise, when comparing, it gives me the correct result. Example, const ... `are equals? ${vector == mirror}`); // false !...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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400 views

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json，本地存储后再取出来拿不到键值

因为是混合开发，ios那边给的数据，我只能把数据放到（手机安装的app）页面来看，打印不出来给的值大概是这样子，此时由键取值是失败的我做了如下处理，存储和当前页面保存： this.paramsInfo = params localStorage. ... 仅在方式2时在页面呈现如下如数据（和前面一样）无论如何，我都取不到它的键值，我该如何做？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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434 views

1 answer

shell - Why is the output of my bash script not as expected?

I wanted to write a shell script (bash) in order to do the following: The script is supposed to print all arguments passed when ... 0 && value <= 88) )) then echo "$value" fi done...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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190 views

1 answer

问一个的nodejs的问题！

var fs = require('fs') fs.writeFile('./test.txt','hello world',function (err) { if (err) { return 0 } console.log('hello') /* 输出 ... )执行完再执行还是和他同步执行的？ hellow world有没有可能输出在hello之前呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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573 views

1 answer

ie11 的 axios 设置头不起作用

react 16.8.6 ie11 浏览器设置如下： headers: { 'Content-Type': 'application/json;charset=utf-8', 'Cache-Control': 'no-cache' } 但是不起作用：...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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572 views

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vue添加高德地图不显示，有告警

告警图片跟这里面的一样 https://ostack.cn/q/10... 求教...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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402 views

1 answer

ng-easyui中tooltip打包成功以后效果失效。

ng-easyui中tooltip打包成功以后效果失效 package.json package-lock.json 本地是有效果的，但是打包到线上就没有效果了...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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534 views

1 answer

for loop - Right aligning looped text in python

I am trying to right align my printed text with a tab space between the two generated columns. di = {"name" ... PyCharm or sublime text output when the print command is instructed....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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268 views

1 answer

Kotlin for android - first button works, second doesn't?

im trying to code a really simple app, it's my first one for android. In the console i don't get any error messages but when ... ) } } } } What am i missing? Thank you in adavance!...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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442 views

1 answer

缓存未命中时，内存的数据先加载到哪级缓存中

是从主存先加载到L3然后L2、L1，还是直接到L1，然后给寄存器...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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529 views

1 answer

请教：怎么用反射把两个Java子类的成员变量合并？

我想实现这样一个功能：两个Java子类A和B，继承自同一父类，但是它们的成员变量的值各不相同现在想把A和B合并成C，要求： 1 当A的某成员变量不是null B的某成员变量是null时，取A的成员变量； ... if (f1.get(object) == null) f2.setName(f2.get(object)) ??? **???** 谢谢了先！...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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114 views

1 answer

mysql插件连接不上mysql

我用DolphinDB database的mysql插件连接mysql，代码如下： loadPlugin("plugins/mysql/PluginMySQL.txt") conn =mysql::connect("localhost",3306,"root","12345", ... 0), with errno: 2002 请问这个可能是什么原因？谢谢！...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

1 answer

omnet++ - How to display queue size

I am trying to display the current queue status (i.e. the number of packets in the queue) of a node in OmNet++ ... all time. Can anyone suggest me how to display it? Thank you....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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369 views

1 answer

windows - Error occurs when deploying the UWP application (installedLocation != null)

Introduction The project was newly created and there was no change in the project. The build of the application when ... ... Deploying file TEST.exe... installedLocation != null...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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267 views

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Converting Javascript array to PHP array or passing it to a PHP file

I am working on a movie ticket booking database using Mysql and PHP.I've done the frontend part using HTML,CSS. The below code ... .png"; seats.push(id); alert(seats); } </script>...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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