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ruby on rails - Devise sessions expiring too fast (hours, not days)

I'm moving this from an issue on the Devise repo as I don't know that it's actually a bug yet. ... cookie store. Regardless, I'm still unconvinced timeoutable is working properly....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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623 views

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vue vdom源码阅读：updateChildren方法为何要判断oldStartVnode和newEndVnode是否相同?

在阅读vue vdom实现中，patch模块下，有一个updateChildren方法，用于比较当前elm下的旧子元素(数组)和新子元素(数组)，实现最大程度地复用旧dom．算法实现 ... (parentElm, oldCh, oldStartIdx, oldEndIdx) } } https://github.com/vuejs/vue/......

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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html - MP4/H.264 video background not showing in IPad or IPhone (playsinline included)

I've been trying to display a video background for a web page in a Koa framework. Being brief the HTML is the ... solution. Any ideas? Here is an example of the video background...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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598 views

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vue 中使用原生 HTML 标签名命名组件的问题。

想像 iview 一样使用<Input>来命名 vue 中的组件，但是控制台会发出警告 [Vue warn]: Do not use built-in or reserved HTML elements as component id: Input 按文章所说的--聊聊 ... 是支持这种命名方式的但不知道为什么还是警告了，所以请教下该如何解决这个问题 ...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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663 views

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PHP 批量插入的时候判断数据表里面是否重复怎么优化

场景：从第三方接口获取到数据比如获取到了 500 条，然后批量插入到表，但是要保证唯一代码如果是这样的（name 字段有索引的情况下怎么才能最大化的优化），这样的结果是有500次的I/O 这 ... = ['name' => $name]; } } if (empty($datas)){ //批量插入 $Apps->saveAll($datas); }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jquery - How to convert an html form into ajax request for a rest controller if one of the fields multi select?

The problem is that field "roles" is a select list with multiple-choice, so the field has to be converted into an array. I ... , password: jQuery('#password').val(), roles : }, })...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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C#如何获取本机上安装的软件，类似于开始菜单里头的功能？

...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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php 后台如何处理，表单提交过来的同一项目的多条数据？？

页面结构如上图所示，后台使用php.假如在教育经历中有三条记录，点击保存时同时提交到了后台，该如何处理比较好？？前台页面要可以动态生成新的一行，该怎么处理多行间name及其他属性的问题？？可以讲一下，大概的思路？？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bootstrap做的下拉菜单里面元素的高度怎么自定义啦？

如下图所示，我现在修改同事样式，发现很多下拉菜单是用bootstrap做的，在修改下拉菜单的最下的div的时候发现，缩小高度时，通过控制台可以看到盒子高度变小，但是位置怎么都不会变化，请打神 ... : 0; border: 1px solid #ccc; text-align: center; } p { color: red; } } } }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Where is .config file is stored to make target linux image for a device

I am attempting to compile a custom linux kernel with target device drivers defined in .config file. When I open Github ... device drivers. So where exactly is .config is located?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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383 views

1 answer

使用spring mvc时，RequestBody中json转换成对象失败，对象中包含list

使用spring mvc时，RequestBody中json转换成对象失败，因为对象中包含list，如果我去掉list，就能转换成功代码： DTO类代码： ... java:967) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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333 views

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eclipse plugin开发loadClass后getAnnotation()返回null？

通过URLClassLoader加载project中的一个类，类中自定义的注解，然后getAnnotation总是返回空，求解已知eclipse插件中加载类的方法，并使用，如 ... ", true, classLoader); System.out.println(cls.getAnnotation(HeadProtocol.class));...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Build custom target by default in CMake

I'd like to run a custom command with cmake. That sounds like an incredibly simple task/question, but it's frustrating ... the TARGET for my custom command and not bother with bar....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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397 views

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在eclipse上创建了css文件，能不能设置css代码自动提示？

在eclipse中如果创建的是HTML文件或者jsp文件，是可以实现css语法提示的，但是就是css文件不可以。...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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eslinit规则--块语句内行首行空行尾部不空行

请问eslint规则中如何设置"块语句内行首行空行尾部不空行"？ padded-blocks padded-blocks似乎只能设置都空行，或是都不空行...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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235 views

1 answer

python - How to be able to concatenate the values of a column with the name of the other columns in a DataFrame

How to be able to concatenate the values of a column called "ITEM" with the name of the other columns, ... image description here on that dataframe: enter image description here...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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272 views

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分析这段代码会alert什么？

window.val = 1; var json = { val:10, dbl:function(){ this.val = 2; } }; json.dbl();//this.val = 2 ⒈ var dbl = json.dbl; ⒉ dbl();// ... val为2,最后⒋步就变为了 2+2=4 不知道这样的想法对不对,还请指教,谢谢！...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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188 views

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console.log()方法输出问题

var oDiv=document.querySelector('div'); var oP=document.createElement('p'); console.log(oP); oP.innerHTML='hello'; oDiv.append(oP); 这里为什么输出不是<p></p>,而是<p>hello</p>呢？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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323 views

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ionic2如何在android平台上使用ios的样式

默认android的各组件样式太丑了，如何在android平台上也使用ios的默认样式哦...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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307 views

1 answer

thinkphp数据（集）筛选问题

场景大概是这样的，数据库有字段A,B，然后C = A - B ，而D是根据C的值来判断显示，C和D都不是数据库字段，问题在于我的模板使用了Ajax，本来可以直接在模板判断C的值，但是这样暴露了C这个重要条件，有没有办法在php内实现呢？tp能对数据集进行二次筛选吗？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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394 views

1 answer

分库分表后关于查询的问题

假设用户表规划是 2亿 = 500W(每表) 20表(每库) 2库与一个用户的总表需求是这样的当需要用户互相关注的情况， following 表与 followers 表（先假设不用分表），表结构分别为 following表 = ... 一下，谢谢，有类似的相关经验也可以只放redis 不入库这样的方案接受不了目前想要放redis 且入库...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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223 views

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django源码探究，as_view()的具体分发过程？

最近在学习django的类视图，就打开源码学习下，但是对基类View的as_view方法不太理解，先把源码贴上来： @classonlymethod def as_view(cls, **initkwargs): """ Main entry point for ... （它并不是request的方法是吧？）？代码哪里提到了这个过程呢？望大神指教~抱拳...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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258 views

1 answer

python多线程爬取文件，怎么设置超时重连。

在用python爬取数据时，单进程里开启多线程抓取，毕竟IO密集我就没搞多进程了代码如下 def get_downloads_url_list(self,pageNum): FilePath='C:/RMDZY/h'+str(pageNum) os.chdir( ... 我这么记录啊，能不能捕获这个异常然后重连啊主要还是写法，不太会生疏啊...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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273 views

1 answer

gitbook serve命令提示找不到wensite.css和website.js

错误指示的目录下的文件是空的：求大神解释一下...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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227 views

1 answer

wxMaxima: understanding ratcoef

Ran into the following behaviour from ratcoef that I don't understand, and was hoping someone could help clarify ... these results. Any suggestions would be very much appreciated!...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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148 views

1 answer

c# - JSON Schema conditional result

I am trying to create a JSON schema validator. My Json schema validates a certain property value and based on that it ... "]; bool valid = properties.IsValid(schema, out messages);...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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233 views

1 answer

phpstorm有eclipse的自动清理import的功能吗？

我每次移动文件，整个命名空间和import就变得糟透了。...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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264 views

1 answer

应用ant desigh和bootstrap的区别？

举两个代表性的框架来对比，bs不需要什么技术栈，相反ant需要es6 react node等但是bs的兼容处理比ant做的好，或者说我用bs需要做的兼容性工作会比ant少，框架不是为了说，我接下来的应用和处理更加方便，所以用bs完全没有问题对吧！所以ant这些框架的诞生为了技术而技术？以上纯粹个人理解，主要是新旧技术的一个疑惑...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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