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python - I drew a Ball from class and It's stuck in the same place (python3/pygame)
I have a Ball class and I drew a ball from that class. No matter what coordinates I put the ball is either ... 8,red) while loop: ball.Draw(window) pygame.display.flip screenshot...
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比较年份,用substr截取前4位快,还是date('Y')快?
1问题描述:根据始末日期查询数据,由于数据库数据量大,用between and很慢,就添加了year,month,day字段,在比较年月日的时候有substr和date两种方法,两种都尝试过每次加 ... "; } }else{ $str = " where log_date between '$startTime' and '$endTime' "; }...
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toast在iOS模拟器上兼容性不好,无法显示出来
在真机上跑modal.toast(),能够正常显示。在iOS模拟器中却蹩脚了。...
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npm安装全局包时Error: EPERM: operation not permitted
安装命令: cnpm install vue -g 错误如下: Error: EPERM: operation not permitted, mkdir 'C:ProgramFiles odejs ode_modulesvue_tmp' at Error (native) ... org vue -g 是全局安装包的问题? 还是cnpm本身的问题?...
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npm安装全局包时Error:
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algorithm - How, do I select the best match for a string in multiple documents, where the score is equal for both?
I have implemented an algorithm in Elm, where I compare a sentence (user input) to other multiple sentences (data ... similar? which methods are used to retrieve this similarity?...
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mysql无法保存emoji表情
mysql版本为5.7,已经将数据库字符集设置为utf8mb4了,如图: 字段的字符集也已经改了: `content` text COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '评论内容' 但是页面提交过来 ... content' 页面上的编码用的UTF-8,框架用的是laravel,请大神指点哪里的配置还有问题?...
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请问这个model类是自动生成的,还是手写的?
这是SSH框架的项目下,一个用户的实体model...
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同一账号,如何实现另一用户登陆后,之前用户自动下线
如题,如何实现?...
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node.js - Heroku Discord.js ffmpeg
I wrote a discord music bot, and i used ffmpeg so that i put the executable in the botfolder, now i ... .1]: at processTicksAndRejections (internal/process/task_queues.js:97:5)...
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need advice with passing a javascript value into html format so i can show a grade screen of correct answers instead of 'document.write'
below is the code for the check function that will store the value of the 'c' variable and the document.write ... Torvalds Kohsuke Kawaguchi previous Back to Question 1 {{/each}}...
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255
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r - How to write to csv files using specific column data from txt files using loop in python?
I have 167 (genes) X 26 (population) files with data as follows in each file. (Number of columns in each file is ... my first time using R. Is it possible to attach some files?...
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r
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314
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所谓的量化交易程序,其目的是帮助股民或者基金公司的投资者选股票对吗?
所谓的量化交易,到底是给基金公司的投资顾问或者基金经理使用的呢?还是给广大股民看股市数据,便于炒股的? 本人没买过股票,只在支付宝买过一些基金和定投,赚了几毛几块钱 对基金的了解只限于,其实就是多买几只股票,所谓的不要把鸡蛋放到一个篮 ... 估计,基金投资经理可能会有一般人看不到指标,而不仅仅我上面说的这些普通人容易理解的数据 我说的对吗? 请大神指教 ...
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Jan 29, 2021
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372
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web端与服务端交互,签名算法一直被破解怎么办?
签名算法已经被破解了好几次了,至少尝试过以下几种: 增加sign附加参数,使用字典排序+时间+随机数+密钥签名 类似网易签名算法,只传两个参数 类似抖音签名算法,需要浏览器环境(使用dom,canvas对象) 但是都被破解了。...
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Jan 29, 2021
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416
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绝对定位absolute元素默认的z-index值是多少?
绝对定位absolute元素默认的z-index值是多少?...
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Jan 29, 2021
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vue和bootstrapVue使用table和modal时,有多少条数据就会弹出多少个弹出框
` <b-table striped hover small :fields="fields" :items="lessons" responsive="sm"> <template v-slot:cell(Id)="data"> {{ data.item.Id}} </ ... 样写的话,表格中有多少条数据,就会弹出多少个modal,请问问题出在哪里?...
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Jan 29, 2021
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252
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Route multiple components with the same base url in Angular
I am pretty new to Angular and I am creating an app that has nested information in pages (like in a file explorer) the ... it if you could explain it to me. Thank you in advance!...
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Jan 29, 2021
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Route
0
votes
283
views
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chorme sources断点调试取消断点后一直加载中?
RT,取消断点后就一直加载...
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Jan 29, 2021
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71.8m
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chorme
0
votes
314
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mycat启动后CPU一直上升,CPU占用率达90+%
mycat版本:1.6.7.5-release wrapper.conf #************************************************** ... "0" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100">...
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0
votes
412
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1
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vue海康摄像头web 页面开发
我想的是固定在那个地方,而不是随着浏览器滚动而滚动。请问如何修改?...
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Jan 29, 2021
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vue海康摄像头web
0
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444
views
1
answer
微信企业付款到零钱 证书错误 请到商户下载证书
证书已经下了,路径也是磁盘的绝对路径,但是还是提示证书错误 请到商户下载证书...
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Jan 29, 2021
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微信企业付款到零钱
0
votes
472
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1
answer
js有变量提升,怎样才能使用当前定义的变量?
在普通的H5里面写以下js代码是可以获取到commonStatus状态的,但是我在Vue里面,单独写了一个公共方法js文件,在这个公共文件也是写的以下代码,获取到的commonStatus ... 值比如commonObj.curobj2 = true; 在commonObj的某个方法里面调用commonObj.curobj2获取到的也是undefined ...
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Jan 29, 2021
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0
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241
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redux中间件的return是做什么的?
next是传递给后面的中间件,那中间件的return是做什么用的呢?...
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Jan 29, 2021
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238
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Why list index in Django Template it's not in the output?
I use this in the template {% for num in '0123456789'|make_list %} <li>{{ respuesta.num }}: {{ puntaje.num }} < ... yes, there are elements in the list "respuesta" and "puntaje")....
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Why
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448
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把“男:XXX女:XXXX男:XXX男:XXX女:XXXX”这种形式的字符串转变成数组
我想把“男:XXX女:XXXX男:XXX男:XXX女:XXXX”这种形式的字符串转变成 array(['sex'=>'男','content'=>''XXX],['sex'=>'女','content'=>''XXX],…)这种形式的数组,有什么好的思路么?...
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请问固码支付是什么原理?
关于固码收款,想请问下大家: 1.如何获得支付成功回调? 2.一个收款码如何区分不同金额订单(或者说能不能)?...
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Jan 29, 2021
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372
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开机启动脚本中有一行exit,怎么删除该脚本?
远程连不上电脑了。除了重装有办法删除那个脚本文件吗?比如grub之类的?...
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Jan 29, 2021
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能否监听并重写methods 中的所有函数调用
想在函数调用时统一添加埋点事件tranck(),但是不想每个都手动添加,希望通过监听重写的方式自动写入,请问各位大佬前辈们,这可以实现吗 methods: { //页面跳转 gotoPage(path, data = {} ... .catch(error => { console.log('--------------' + error); }); },...
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能否监听并重写methods
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273
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html - How can i show the Div/ul/List in a resposive layout below the navigation but overlaying my content?
I am trying to build a responsive navigation. The idea is to build something similar to Apple's Sub Navigation (e.g. on ... dolore te feugait nulla facilisi.</p> </div> </div>...
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html
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