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    在一个抢购功能中,为了让商品不出现超卖现象,引入了锁,假如使用的是redis锁 这里有个问题就是在没有获得锁的线程,后续的处理逻辑是怎样的呢? 伪代码: if(getRedisLock()){ // 获取锁成功扣减库存 } 如上面的伪代码,如 ... 逻辑感觉是有问题的 在高并发下,第一个请求拿到锁,后续的很多请求可能会都获取锁失败,这样就会导致商品卖不完...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    eclipse springmvc 修改一行代码快速生效 使用eclipse开发spring mvc项目,使用tomcat 1.使用tomcat中context为autoreload 2.设置完成后修改1行代码tomcat就会重启,并且重启速度非常慢 其实.我仅仅 ... 我修改的代码应用即可,有没有其他办法可以不让tomcat重启,然后直接应用我修改的代码...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    有2个文件txt.txt,txt2.txt 内容如下: txt.txt-> OG0000000: AT1G01250 AT1G04370 AT1G06160 AT1G12630 txt2.txt-> OG0000001: AT1G01251 AT1G04371 AT1G06161 ... 么改 想有一个工具函数来批处理这些文件返回一个对象 ...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a question w.r.t to finding max or min of an aggregate function in tableau. Tableau report is a biller details ... apply max to it. Any ideas on how to resolve this ?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have two tabs, one with all of my column headers (data tab), the other tab with less headers, but all from the data tab. ... :AK,COUNTIFS($I$1:$1,data!I1:AK1)))) Here's my sheet....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I found a Deep linking solution for Win/macOS. Please help me with Linux....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace study_test4 { class Program { static void Main( ... ReadLine(); //让控制台停在显示界面 } } }...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I install homebrew native on my m1 MacBook Pro, and I installed yarn and node using home-brew without any problem ... it raises error say error Command failed with signal "SIGILL"...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    配置如下 module: { rules: [{ test: /.(gif|png|jpe?g|svg)$/i, exclude: path.resolve(__dirname, './src/assets/icons'), use: [ { loader: 'file- ... 也有相关的文件,但不知道为啥显示不了,而且是系统所有的图片都不能正常显示...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    我已经申请了key值了,按道理来说直接在浏览器打开接口应该是可以访问才对啊,跟腾讯位置服务一样,可惜为什么这个必应的就死活访问不了,请问有大佬前辈知道吗,感激不尽!! = =|| 明明已经换了key值了。...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    接手了一个项目 里面依赖版本有点乱 同一个jar包有很多依赖版本 一个工程里,依赖的某个jar的版本已经写死, 是1.22 用maven helper查看也是1.22 但是在java文件中,某个类显示不可以 ... 本 IDEA中这个类依然显示红线,Cannot resolve symbol 但是package打包没问题 同事的IDEA中也没问题 怎么回事?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    oninput 事件里 //先把非数字的都替换掉,除了数字和. scope.showBuyPrice = scope.showBuyPrice.replace(/[^d.]/g,""); //必须保证第一个为数字而不是. scope. ... ).replace(/./g,"").replace("$#$","."); 之后怎么写能满足需求呢...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    public void testingExecute() { try { using (WordprocessingDocument wordDoc1 = WordprocessingDocument.Open(fromDocument1,false)) // opening ... } catch (Exception Ex) { throw; } }...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Is there any way to pass a boolean parameter to the class mediator? I tried with the following ... parameterargument type mismatch {org.apache.synapse.config.xml.PropertyHelper}...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    我开发安卓数据库的时候不想存储的数据被系统清理软件当作“缓存”、“垃圾软件”而清理掉。 清理软件针对的是否只是cache目录,而对data目录下的数据库没有删除权限(需要root才行)?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Hi I just want to be sure that adding firebase script and initializing it in the head tag in the ... in scrpit tag firebase.initializeApp(somefirebaseConfig); firebase.analytics();...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Every time I try to resize the PyGame window, there's no resizing of the game, it keeps like before, and there's just more ... is there a method or do I just need to hand code it?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    问题描述 我个人尝试用Vue写的后台管理,用的花裤衩开源的后台模版 https://github.com/panjiachen/vue-element-admin, 其中我按照这个模版集正常集成了Tinymce编辑器 查看issue没有看到,没有看到粘贴上 ... /g, '') 我想要的效果 每次粘贴都只显示一张自己粘贴上传的图片 不显示base64的图片...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    { path: "/conversation/IntentTraining/:id", component: CreateEntities, exact: true, }, I am passing this to breadcrumbs ... I click on the IntentTraining it should not be crashed....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    iview+typescript +vue 使用Message组件定义的方法 报错? Message.info({ content:'hellow world' }) 提示does not exist on type 'typeof Message' 求解~...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    假定int a=2,b=3;,表达式(b/a*2.0>2.0*a/b)+(++a-b--)的值是? 为什么答案是0而不是1呢?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    vue/cli3构建的项目如何查看当前项目webpack的版本?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I ... ...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    有以下数据结构: var treeData = { 'name': '舰艇操作训练效能', 'weight': '100', 'type': 2, 'id': 1, 'childers': [{ 'name': '进港过程效能', ' ... 想要拿到里面最底层的那个childers,我应该怎么处理这串数据,各位万能的大佬帮帮忙!!!在线等,急!!!!!...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I want to display the form value in the console but when I use getelementsbyclass is change the form content in bootstrap AND ... (msg) console.log(JSON.stringify(output,' ',2)) }...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    自己想自制组件 成功上传后在另一个项目中导入试下。 首先我npm install textmt --save 然后dev,就报错了。。 看错误信息是叫我安装依赖,但是我已经安装了啊 。。 求大佬解答,谢谢!...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    移动端项目中获取手机验证码的操作,其中引用到jquery-2.2.4.min.js和jquery.mobile.custom.min.js,代码如下: html: <input class="code_btn" type="button" value="获取验证码" / ... 就一切正常(按钮禁用,不会触发点击事件),但并不明白其中原理,希望能帮忙解答下~...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    参考教程 https://ostack.cn/a/1190000005972877 我的环境环境 PHP 7.2+ nginx 1.18,gizp已经关闭 但是还是在执行完后才一起输出。 有朋友知道问题点在哪里吗? 谢谢...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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