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1.1k views

1 answer

Error while deploying node.js application to heroku (cannot find module dotenv, and npm ERR! errno 1)

I'm trying to upload my first node.js application to heroku. Build is showing successful, but the application cannot be opened ... = require('morgan'); const cors = require('cors')...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.8k views

1 answer

想要在canvas上渲染一张图片，图片可放大缩小，再在canvas指定一个区域，都只截取该区域，如下图代码

问题描述想要实现一个头像截图上传功能，在canvas上渲染一张图片，图片可放大缩小，再在canvas指定一个区域(红色框)，有如下待解决问题: 1.不管图片放大缩小，都只 ... ") document.getElementById('img').setAttribute('src', url) } </script> </body> </html>...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.2k views

1 answer

single sign on - Is there a maximum length for NameIdentifier claim values?

We're adding single sign-on to an existing application that now requires a database table to store the external ... recommendation for this value, particularly it's maximum length?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

1 answer

jq怎么实现滚动到某标签给它一个class，离开去除这个class

<ul> <li></li> <li></li> <li></li> </ul>...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

1 answer

java List 相邻两个数据累加,可以用stream的collectors.reducing实现么

a0= a0, a1= a0 + a1, a2= a1 + a2... 有位兄台提醒我了, 我把业务说一下. 场景是我需要给echart的折线图赋数据. LineDto是一个有两个字段的Dto. ... .getGemBoardCount()); dto = i; } } 我想问下, 可以用stream的collectors.reducing实现么, 谢谢...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

1 answer

请教关于ios app迭代上传更新的问题

使用react-native开发的APP 目前证书签名啥的都弄好了，正在xcode里上传应用在去年的时候之前的同事上传过一个版本，我现在相当是迭代更新了，有一些问题不太明白，没搞过原生开发问题 1 第一次上传的app版本是1.0，我现在 ... icon 截屏手机号和联系人等等这些信息都是原来的是不是要点击左上角的那个+号新建一个1.1.0的版本呀...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.4k views

1 answer

React Native WebView is not getting loaded same url request second times

I am using react-native-webview in my project and i facing issue while loading the request second times. Here is ... above request but second time webview is not getting loaded....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.8k views

1 answer

ios - xcodebuild Unsigned IPA - Missing Push Notification Entitlement (Work when signing directly the App in XCode)

Context : XCODE 12.0.1 I'm using Push Notifications in Ionic. The configuration is OK. I added the Push Notification ... ... I can't understand why this tool made it work...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.4k views

1 answer

c - does fork() have limit to how much it can create new process?

I'm working on the 1 server-multiple client code to transfer file using socket, I'm using fork() to create new ... for fork() function to how much new process it can create?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.3k views

1 answer

How should I free a malloc variable when it has been assigned to another variable as well? (C Language)

Sorry if this has been asked already. I have this program: int main() { int *X = (int *) malloc(sizeof(int)); *X = 10; ... to call malloc() for Y as well, or is Y fine as it is?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.9k views

1 answer

android - having trouble running a flutter them on adroid studio

I'm new to the intricate dev world. Im a novice at best and am use to working with WordPress. is there anyway ... from envato to android studios and then to the emulator, Please?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.6k views

1 answer

父组件如何分辨子组件中通过同一个事件通知的不同变量？

在网上找了一个地址选择的组件，功能是选择国家省份城市，简略代码如下我的问题是，这里在选择了国家省份城市时，都是使用 addressSelect 事件向父进程通信，那父进程怎么知道当前事 ... ', val); }, changeCity(val) { this.$emit('addressSelect', val); }, } } </script>...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.2k views

1 answer

json.net - Issue with serializing 'object' with System.Text.Json

I need to store an unknown JSON structure from an external API, but when I serialize the data using System.Text.Json, ... from Newtonsoft.Json, but I don't fully understand it....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.9k views

1 answer

把包含某些话题的内容重列到一个网页

需要做一种类似移动端今日头条的网页。通过数据库给前台添加新闻列表。每个新闻打上一个标签，通过点击导航栏可以跳转到次标签对应的所有欣慰，需要学习前端哪些技术，目前大概会html以及css。需要哪些简单的技术能达到目的，...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.9k views

1 answer

大文件如何通过 Mapreduce 切分存入 hbase

大文件（几百M 几个G）通过 Mapreduce 切分成多个 5mb 的小文件并存入 hbase 这种操作如何实现啊为啥自定义Mapreduce的driver使用FileInputFormat作为输入 ... boolean result = job.waitForCompletion(true); System.exit(result ? 0 : 1);...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

1 answer

Feign @RequestLine GET Param which contains / slash value

I have the following feign annotation in my feign client and it is all working ok. Things have changed and I ... this problem when trying to use reserved characters in the URL?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.4k views

1 answer

New Apps Script IDE too helpful. Can you turn it off?

Any idea how to switch off the contextual help that covers your code above the line you are working on? It also covers the auto-complete which is super annoying....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.4k views

1 answer

有同学遇到过PHP POST data自动添加到reponse buffer里面吗？

我在入口处ob_get_contents接口就取到了post data，导致reponse数据有两部分{post data}{reponse data}，重启php-fpm就正常，过一阵又有这种情况，例如post data:page=2&rows=0,返回数据：page=2&rows=0{response data}...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

1 answer

apache access_log 里很多其他网址是什么意思？

‘GET’ 后面为啥是其他的网址呢？当时服务器的性能被这些不断的请求拉垮了。 GET 后面不是应该是域名后面的参数吗 , 比如 GET /static/css/index.css HTTP/1.1 。...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.3k views

1 answer

PHPer学习GO的一些烦恼

大家哈，我是PHP一枚，最近在学习GO,基础的看看也会用了。但是看底层源码就很懵懵的。看完之后呢，行吧。自己找一个框架来快速的 CRUD，一看框架，就堵的不行，这里看不懂，那里看不懂，还有 struct 之间的嵌套。方法有时候要传指针。反正就是学习起来很费劲，请问下大家有学习都是怎么计划，和怎么学习的。我看下我得改进自己的学习方法和计划呢！...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

4.2k views

1 answer

sqlite 的字段长度有什么用？

创建一个表，一个字段长度为 1 CREATE TABLE "main"."aa" ( "t" TEXT(1) ) ; 插入一个长度大于 1 的数据，为什么会插入成功呢？那么这个字段长度有什么用呢？ INSERT INTO "main"."aa" ("t") VALUES ('adadasdasdasdasdasdasdasdasdasdasdasda')...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.2k views

1 answer

python - Identify same values for particular key in list of dictionaries

I have a list of dictionaries that look like this: [ {'ServiceID': 20, 'primary': '20', ... ['secondaryCount'] = temp_secondary_counts +=1 temp_count_list.append(temp_dict)...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

4.2k views

1 answer

ubuntu - Cassandra initial connect with gocql

The code is written with Go and Cassandra and when I build it works good in my local computer. But when I upload it to the ... err != nil { panic(err) } Anybody has any solution???...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.8k views

1 answer

el-tree 不设置复选框怎么设置禁用其中某项？？

需求原因，需要用tree组件做下拉选框，怎么禁用掉其中某项呢？比如不能用本部门作为上级部门。先行感谢！！！...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

4.8k views

1 answer

javascript - String representation of an ipv6 address in Classic ASP

For geolocation purposes, I am trying to get a string representation of the numeric value of an ip v6 address. Because ... any pointer on how I can get that conversion to work?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

4.7k views

1 answer

mapping - How to drag a polygon in mapbox-gl-js?

I have a map with multiple polygons. The polygons need to move/update on user click/drag. The functionality I want is the ... , but I'm unsure how to make it work with polygons....

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

4.0k views

1 answer

android - How to integrate instabug SDK into flutter app

I'm trying to implement Instabug (crash analytics) into my android flutter app, and I'm confused as to where I should input ... And if I need to create one, where would I make it?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.2k views

1 answer

docker 镜像启动后立即访问地址失败需要重新刷新几次或等待几秒才能访问

正学习使用 docker-py 开发容器管理应用，用户在前端页面点击启动容器，后端 api 收到请求后让某个镜像按照指定 ip 和端口启动然后返回前端用户指定的 ip 和端口的 json 响应 ... docker inspect congtainerid 判断 running 状态？哪位大佬可以写个 vue + django 关键说明代码啊？非常感谢！...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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