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需求是这样的，有很多类似的流程如下：有一个函数，我传入一个开始节点Node，能够获取所有的流程走向，包装List返回，比如上面这张图就有两种走向：通过和不通过我开始用递归来做，类似这样：测试了几个流程，确实能达到效果，但是一遇到复杂 ... 这种情况除了递归还有什么解法吗？如果没有，这种递归有哪里可以优化的地方？小弟能力有限，想了几天没啥好办法.......

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

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427 views

1 answer

好像只有面试的时候考算法，但是在实际工作中算法几乎用不到？

算法在实际工作中的用处，我工作快3年了，对数据的查询是从数据库查询。但是对数据的排序等操作基本用不到像什么插入或者快速排序算法，难道算法只有在面试的时候有用吗？最近一直在学算法，但是学了之后发现在实际工作中用不到。。。。。。，很矛盾！...

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

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555 views

1 answer

如何在vue中实现路由跳转判断用户权限功能？

目前自己在用vue搭建一套前后端的博客系统，在后台登录中遇到了获取用户权限的问题想请教一下需求：当用户跳转到管理员界面localhost/#/admin时，需要判断该用户是否登录过，如果没有登录则跳转到/login登录路由思路1：通过 ... 指点一下我这位菜鸟另外在下想拜师学习，希望有兴趣收徒的大牛能收下我，我保证努力学习，争取早日提升技术 ...

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

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389 views

1 answer

实际项目中Activity传递数据最佳实践是？

有个代码优化的问题，假设现在项目有4个Activity依次跳转：A》B》C》D 有一些公共数据 B，C，D都需要，是用Intent依次传递，还是直接写成public static，或者更好的方法？现在D界面进行了一些操作，希望返回到A时（注意：不是D直接跳到A，而是D，C，B回退到A）刷新界面。除了用标志位，更优的方法是？来，畅所欲言吧...

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

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170 views

1 answer

JS隐藏DIV的方法？（隐藏后不占位）

刚用JQ的hide()隐藏了DIV，发现虽然隐藏了可DIV还是占位。有什么办法隐藏DIV并且不占位？哦，原来是其它CSS的问题。不是HIDE()的问题。谢谢，结贴了。...

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

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465 views

1 answer

Hybrid应用web端绑定点击事件相关的问题

之前没开发过hybrid的应用，第一次开发用的是zepto绑定事件，共用方法里对全局的data-event绑定相关事件，回调函数里判断是不是客户端然后跳转到相应的链接但在iOS端出了问题 iOS捕获到的事件不是 ... de]) { fn(el, event); } } catch (e) { throw new Error(e) } }); };...

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

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224 views

1 answer

umeng分享中遇到找不到方法

代码这样： umImage = new UMImage(mContext, R.mipmap.app_activity_icon); mUMWeb = new UMWeb(shareurl); mUMWeb.setThumb(umImage);//缩略图运行： ... 的类型: UMImage无法转换为String 什么原因呢 umeng的demo没问题的...

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

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1.4k views

1 answer

element UI添加事件触发两次问题

1.起因是我想给elementUI的多选框组件绑定一个点击事件，但是不知道为什么绑定的点击事件会重复执行两次，然后我就没有在elementUi的多选框组件直接添加事件，而是改用一个div来包 ... template> <script> export default { methods: { popup(){ alert(1) } } } </script>...

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

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323 views

1 answer

webcam - OpenCV different Cameras, with same settings has different FPS

Can someone explain, why on the same program, (program doesn't really matter I think, as it's the same on pure continues ... (30.000 fps) Interval: Discrete 0.040s (25.000 fps)...

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

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521 views

1 answer

启动webpack-dev-server后。。。。

这里有[not cacheable],不知道为啥会出现这种情况？在晚上搜也没收到相关内容，只能在这里请教了...

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

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555 views

1 answer

rust - Lifetime bound of the form T: 'a

I am trying to understand what T: 'a means, where, I guess, T is a type and 'a is a lifetime. I understand what 'a ... example? I can't even imagine where we could use it and why....

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

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447 views

1 answer

node.js - how to delete row from database immediately in react js?

I am able to do axios.delete to remove an item from my database. But won't be updated immediately unless I refresh the page ... </div> </div> </div> ) } export default GestImages...

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

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494 views

1 answer

ios - Delete or remove dashed frame around my UIView

i have this UIVIew with label text that says welcome who ever login the system: i have mentioned that in new iphones (lets ... , like this: can anyone know what can be the issue?...

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

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348 views

1 answer

angular中使用ui-router和oclazyload按需加载模块时，如以下代码，是什么作用什么原理？

需要对app做以下配置，原理是什么，为什么需要这样做 var app=angular.module('app',[]); // lazy controller, directive and service app ... ; app.constant = $provide.constant; app.value = $provide.value; }]);...

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

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488 views

1 answer

关于小程序音乐组件问题

微信官网文档给的一个音乐地址，之前是可以用的（许巍的此时此刻）；但是为什么最近使用的时候会报错。在线等，比较头疼，整不明白了。...

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

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623 views

1 answer

reactjs - TypeError: Cannot read property 'map' of undefined in passing jsonfile to a cponent

I'm trying to read a JSON file and trying to pass it on to the component however I am getting this error, TypeError: Cannot ... { "answerText": "Dublin", "isCorrect": false } ] } ]...

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

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479 views

1 answer

分页查询中如何使用多线程加快处理速度？

一个历史表中有大量的数据，现在要通过分页式查询处理转换数据现在将处理数据的逻辑放在线程池中处理，以加快处理流程可是总是出现事务方面的异常比如 ... { processTradeInfos(); } private void processTradeInfos(){ //do something with tradeInfos ..... } }...

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

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349 views

1 answer

pyspider爬pdf爬了一小段时间后就不动了

下载了一小部分之后就不动了，stop之后重新跑也没有任何反应，有人知道是怎么回事吗？谢谢大家。...

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

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391 views

1 answer

python - "yield" expression and value return right inside generator function

I understand what the yield keyword does. But here I found an example for yield usage which makes me frustrated: ... above) gets proper value and insert it at next expressions?...

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

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241 views

1 answer

Scala aggregate function vs. Spark RDD aggregate function

Here are the definitions of the function: Scala: aggregate[B](z: => B)(seqop: (B, A) => B, combop: (B, B) => ... in Scala is in lazy format, while in Spark RDD is in eager format?...

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

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265 views

1 answer

怎么用lambda表达式表达一下代码?

class A { private int key; private Object object; public int getKey() { return key; } public Object getObject() { return object; } ... map.put(sum, list.get(i)); } } return map; }...

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

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174 views

1 answer

javascript - Sorting array of objects in EJS

I am finding trouble in sorting an array of objects in EJS (sent from the server in Node.js). The array of objects ... parseFloat(b.school); }); loadTableData(data); } </script>...

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

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263 views

1 answer

R语音能否和LaTeX或者markdown结合生成带参数的文本？

R语言和LaTeX markdown结合为我们编写生成报告提供了极大的便利，可是在日常使用中，R语言和排版语言两者的结合还是比较僵化，代码都是分开放分开生成到输出才拼接到一起有没有一种方法，能让R语言的运行结果插入文字段 ... 中可以复用这个参数a，就像Excel中的引用单元格或者Python的 '运行结果为%s' % a 希望大神不吝分享探讨~...

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

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685 views

1 answer

npm 配置代理安装依赖仍然很慢

代理配置是没有问题的 proxy=http://127.0.0.1:1087/ https-proxy=http://127.0.0.1:1087/ 就是npm下载非常慢, 用代理上网看视频都没问题, 尝试淘宝的cnpm就非常快. mac系统, 是我个人的问题?...

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

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255 views

1 answer

使用vue-router时报错：Vue.use is not a function

我自己按照官方文档步骤走的， webpack编译也能过。是版本问题吗？...

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

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723 views

1 answer

discord - Get roles from reaction

I am trying to create a message with reactions for my bot, if a user clicks on a specific reaction he is automatically given a ... } else { console.log("Errore"); //Error }```...

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

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406 views

1 answer

vue下拉选择框获取不到当前选项

console.log(this.runner_Leader)只能获取到option里面的value，获取不到label，求解...

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

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557 views

1 answer

ios - Handling tap for Siri intent extension

I have added an Intent Extension for my app, now after Siri shows the result I need to pass only a string to the iOS app ... the Siri UI. How can handle the tap and pass the data?...

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

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