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Recent questions
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ruby on rails - React frontend deployment to heroku issues. 404 error
I am new to react and heroku. My backend is Ruby on Rails. I followed this guide: https://dev.to/caicindy87/ ... Solved I didn't include the static.json and it somehow works....
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Jan 27, 2021
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ruby
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请教 Java 的 Quasar 库的 Fiber 性能问题及使用姿势
今天试了下 java 的 fiber 库 quasar,有些疑问 测试方法是 扫描本地端口 8000~9000 查看端口是否 socket 监听,本地启动了一个 8080 的服务 比较不同方式扫描一遍1000个端口耗时 quasar 的耗时 ... 改造的 有过 quasar fiber 的使用经验么 可以解释下我这个结论是正确的 还是我操作方法有啥问题...
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请问vue 从别人的网站加载图标 这样写,会造成页面卡顿,影响性能吗?
需要加载大量图标,分别从不同的网站加载网站图标,这样写会导致用户操作卡顿吗? 下面是图标所在的原子组件, 会重复N次。...
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Spigot/Bukkit Plugin: How to Me Check Item in Player Right Hand? - Minecraft
Exaple of answer: if(player has clicked && item in player right hand is stick) { // Do some action } Thanks in advance...
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如何让背景色,铺满整个屏幕,并且高度随内容自适应
如何让背景色,铺满整个屏幕,并且高度随内容自适应...
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Jan 27, 2021
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react新建项目,启动报错
新建项目后,直接启动的 package.json...
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Jan 27, 2021
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Nuxt.js TTFB (首字节时间) 长达1 分钟 每次都这样,请问是什么原因造成的
或者有没有什么工具可以查看这段时间 服务器再做什么,是什么原因导致的...
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npm install 报错 no discription 和 no repository field怎么解决
C:UsersAERO>npm install npm WARN
[email protected]
No description npm WARN
[email protected]
No repository field. audited ... for funding run npm fund for details found 0 vulnerabilities...
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npm
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elasticsearch可以实现推荐用户的数据一直是最新的吗,且数据不是重复的吗
elasticsearch可以实现推荐用户的数据一直是最新的吗,且数据不是重复的吗...
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Jan 27, 2021
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长页面制作时,编辑器每次更改保存,页面就刷新回顶部,不得不再次滚动到下面浏览器效果。很不方便。
往常做的都是短页面,没想到一做长页面这么不方便,有大哥会解决这个问题吗?不然实在太不方便了,最好能让页面既刷新又停留在原位。...
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Jan 25, 2021
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vue请问这个报错是为什么,数据都已经渲染出来了
<div class="p-s-i l" v-for="item in product.productItems"> <img class="icon" src="../images/home_icon_zt.png"> <img src="../ ... 和上图一样 this_.product = res.data } }); } }) 一直报错...
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Jan 25, 2021
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609
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vue中数据格式问题
后台返回的是字符串1,2,3,4,5 我想保留钱四个并且转化为数组格式,这样写数据为空的时候偶尔会报split错,前面加了判断也不行,还有别的方法吗请问 <view v-if="item. ... aItem,index) in item.tags.split(',').slice(0,4)" :key="index">{{aItem}}</view>...
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Jan 25, 2021
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oracle数据库,如下需求如何计算两个时间之间差的平均数?
需求:计算客服的平均响应时间 客户说一句话,坐席说一句话,计算一个时间差(如果一方连续说了多句话,取第一句) 然后一通回话中,会得到好几个时间差 计算在这一通回话中,几个时间差的平均值 请问用sql如何实现上面的需求呀? 说明 fromjid:说话方 tojid:听话方 loginid:一通回话的唯一标识 time:时间 body:说的话...
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Jan 25, 2021
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JS通过canvas识别图形
https://ostack.cn/a/11... 请问大家canvas识别图片中指定的某一种图形有什么思路吗?比如识别图片中的长方形(长方形可能经过旋转,不一定是横平竖直)...
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Jan 25, 2021
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scala - Kafka producer: send avro as array[byte] without schema
I am trying to setup a simple kafka stack in local and I am at the point where I need to create a toy ... schema, right? encoder.flush out.close out.toByteArray thanks so much...
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Jan 24, 2021
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scala
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ubuntu - Ho do I solve chrome error for karma tests for Angular with gitlab CI?
I try to run karma tests for Angular with gitlab CI. The .gitlab-ci.yml: image: node:14.0.0 cache: ... .cc Running as root without --no-sandbox is not supported?...
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Jan 24, 2021
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ubuntu
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775
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How to iterate this SQL query to go through specific date range?
I am needing to extract three months at a time of one year for years 2016-2020. For example I need Jan- ... time. DECLARE @StartDateKey int = 20160101, @EndDateKey int = 20160331;...
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Jan 24, 2021
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Posting list to Json without square brackets in Python
I'm trying to pass 10 country names at once to my payload by converting it to list. But i'm facing problems while executing the program ... ","USA","UK"]} ], "planet": "earth" } }...
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Jan 24, 2021
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Posting
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658
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python - what's the difference between filter and comprehention with if?
def anagramwordchecker(z,w): if sorted([x for x in w])==sorted([x for x in z]):return True return ... 's the difference? any advantage using filter? cause comprehension is easier....
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Jan 24, 2021
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python
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r - How to use mathematical notation or engineering notation in certain columns of a kableExtra table?
One can apply docxtools::format_engr() to a table to switch from computer notation to engineering notation. (Source: ... markdown report compiled with knitr both to PDF and HTML....
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Jan 24, 2021
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r
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927
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Solve all json.decoder.JSONDecodeError in python
When I try to load data from excel using models = json.loads(my_column_with_JSon_data)["template"]["module"] ... 'translated_output': tg_text}) output = dfFinalData.append(content)...
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Jan 24, 2021
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Solve
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772
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小程序scroll-view 高度不起作用怎么解决?
小程序写一个音乐播放的界面,歌词滚动单独包装成了组件,但是scroll-view的高度是想给70%但是没反应,目前高度就很长很长,甚至划到下一页 我想知道怎么把歌词的限制在这个黄 ... ; top: 50%; } .lyric { min-height: 64rpx; } .hightlight-lyric { color: #d43c33; }...
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Jan 24, 2021
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小程序scroll-view
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dist/*.dev.js 文件问题
多人开发,git版本控制,我发现有一个人经常会提交这样的目录上来,因为对方修改了a/index.js,提交上来后,在a文件夹下多出来一个dist/index.dev.js,内容如下: "use strict"; Object. ... obj.__esModule ? obj : { "default": obj }; } .... 怎么能阻止这种情况发生 ...
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Jan 24, 2021
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dist/*.dev.js
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657
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1
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python - Efficient conditional selection with masks in very large dataframe
I have a dataframe with some 2 million rows like this: dt num 0 2019-05-12 10:17:00 135 1 2018-01-16 21:32 ... provided (groupby) solves it in seconds against close to one hour......
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Jan 24, 2021
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python
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887
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Cannot redefine property: a at Function.defineProperty?
这段代码会提示错误VM151:2 Uncaught TypeError: Cannot redefine property: a at Function.defineProperty,为什么不是输出a,b,c? let value = "a"; ... c"; } return result; }, }); console.log(a,a,a);...
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Jan 24, 2021
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Cannot
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714
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Gnuplot: can I make x axis stretch at some data points?
I have vector of time points which will be represented at x axis. some of these time points occur at certain sign and ... for double space time points. can I plot this in gnuplot?...
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Jan 24, 2021
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71.8m
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Gnuplot:
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votes
557
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前端有办法生成cmyk格式的图片吗
目前碰到的问题是canvas生成的彩色图片打印出来有色差,需要cmyk格式的打印出来才没有色差。各位有碰到过这种问题吗,是怎么解决的。...
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Jan 24, 2021
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votes
597
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微前端框架qiankun,按照官方的配置,也不报错,但是切换子服务界面就是不显示,求助!
为此专门在github上搞了个demo项目,地址为: 微前端框架演示demo,路过的大神帮忙看看!谢谢!!!...
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Jan 24, 2021
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