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1.4k views

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apache - Starting httpd: /usr/sbin/httpd: symbol lookup error: /usr/sbin/httpd: undefined symbol: apr_procattr_perms_set_register

I have upgraded apache httpd server from 2.4.6 to 2.4.46. When I fire systemctl start httpd ... lookup error: /usr/sbin/httpd: undefined symbol: apr_procattr_perms_set_register...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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134 views

1 answer

sql - PostgreSQL: How to create json using data from table

i have table with column_name and json_path to extract values from json. table: | column_name | json_path | | ----------- | ... ":1,"seller":{"firstName":"John","lastName":"Doe"}}}...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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这个问题是考察什么东西

在文件/home/somebody/workspace/somemodule.js中第一行引用了一个模块：require( othermodule )，请问required 的查找模块的顺序 ... MODULES named othermodule D./home/somebody/node_modules/othermodule/index.js...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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294 views

1 answer

vuex获取不到getters

...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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287 views

1 answer

如何将PMP应用于项目管理的实践当中？

最近在学习PMP的知识，但是概念很晦涩，有没有什么实践的方法可以分享？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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261 views

1 answer

vuex数据共享以及异步问题

有一个大组件里面包含四个子组件，我在第一个组件中请求接口获取了参数a和b，由于后面三个组件请求的有些接口都用到了参数a和b，在第一个组件请求的接口成功后我把a和b保存到看state里面，但是事实上后面三个 ... 所以我又要这样：getCityInfo.then(其他操作）.then() 感觉很重复很冗余备注：组件请求接口都是在mounted时期发生的...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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335 views

1 answer

java - Cannot find symbol for isbn check

I am quite new to java (and programming in general) and have the following code that I am studying and using to make an ISBN ... ; // close Scanner class object //scan.close(); } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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405 views

1 answer

java 3des加密后的结果是怎样组合的

正确的加密结果应该是这样的 public static void main(String[] args) { System.out.println(encrypt("00000000000000000000000000000000","0000010000030200")); } 打印结果: ... 某种方式计算出来希望大神们不吝赐教！！小弟现行谢过了！...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer

go - send an receive http headers in Golang

func main() { http.HandleFunc("/", foo) log.Println("Listening...") http.ListenAndServe(":6001", nil) } ... , I mean templates/VastPlayer/TempVide_.txt: no such file or directory...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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362 views

1 answer

performance - Computing for each datafram column the mean of three subsequent row data for each row (R)

First, simple R example for my problem: > df x y 1 1 3 2 2 7 3 4 9 4 8 0 5 3 1 6 12 24 I'd like to compute for each column ... ] + x[4]) ... xRes[5] = NA # because there is no x[7]...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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298 views

1 answer

ajax实现动态页面的展示

从数据库中已经取到了数据，如何将数据动态的展示到前台页面去？？jsp代码应该怎样写？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.8k views

1 answer

vue -router 跳转不刷新怎么解决（不刷新 window.onload中渲染画布的函数就不执行）

切换标签不显示但如果刷新页面就能显示出来切换的时候元素也都出来了 proSkill.vue <template> <div class="wrapper"> <span class="title">前端技 ... overflow: hidden; } ol{ color: aliceblue; font-size: .9rem; } </style>...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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336 views

1 answer

html - How to change icon color dynamically in Ionic-Angular?

I have a list of chats, and I like to change the color of ion-icon depending on the status of a chat(from attribute chat. ... when chat.status is B. How can I do this? Thanks a lot...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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287 views

1 answer

javascript - Custom page margins using print.js

I am attempting to print payment receipt using thermal POS printer using Print.js library. I can successfully print the page using ... "invoice-print-div", "html"); }); </script>...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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229 views

1 answer

javascript - React Native: cannot use function as default state hook? issue with array computation and slow UI

I have a function that takes a few discounts and groups them by days, so the final result is an array of 7 ... (allDiscounts); return weekDiscountsCopy; } } }; Thanks in advance!...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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513 views

1 answer

c 申请的内存赋值给了其他变量，怎么释放？

初学C指针不明白.... 给 x 申请的内存地址，然后x又赋值给了y，x释放后， y的值还在为什么？y不用还需要在释放*y吗？ int *x, *y; x = (int * ... ", *y); printf("%p ", y); 执行结果 2 0x7ffe4b78aea0 2 0x7ffe4b78aea0 free x 2 0x7ffe4b78aea0...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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229 views

1 answer

DruidWebStatFilter 出错

使用阿里巴巴的WebStatFilter用于采集web-jdbc关联监控的数据，但是在运行项目的时候报错这是我的配置文件 <filter> <filter-name>DruidWebStatFilter</filter-name> ... -pattern>/*</url-pattern> </filter-mapping> 请问大神们这是哪里出错了？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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162 views

1 answer

python - Unable to set Azure autoscale formula using HTTP API

Here goes my first question in SO. It's related with Azure and the way we can set the autoscale formula using the HTTP ... the resource group rg2. I'll keep digging more on this....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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587 views

1 answer

javascript - how to get the item of an array, selected in the select with svelte?

I have the following formData object which has the properties that I read from the input and the select, but I don't really ... >{item.name}</option> {/each} </select> </form>...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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691 views

1 answer

基于node的局域网服务器，怎样才能让在同一局域网下的其他电脑访问

var http = require('http'); http.createServer(function (request, response) { response.writeHead(200, {'Content-Type': 'text/ ... World" response.end('Hello World '); }).listen(80);...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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249 views

1 answer

zepto 表单提交

$("#submit-btn").on('click',function(){ var pwd = $("#password").val(); $("#password").val(DesEnpryct(pwd)); $("#form").submit(); }) ... 代码会改变input框的值，能不能在不改动input框值的情况下，进行加密并且提交？？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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383 views

1 answer

javascript - function is declared but its value is never read : React

I am new to Reactjs so forgive me if this is lame. I am following the Reactjs docs for learning React and during the self ... body> <div id="root"></div> </body> </html>...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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193 views

1 answer

css中overflow-x: scroll不会出现横向拉条？

css样式 .tree{ overflow-x: scroll; white-space:nowrap; text-overflow:ellipsis; top: 19px; left: 66px; width: 124px; border: 1px ... ="node" > {{node.name}} </treecontrol> </div> 结果...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

1 answer

Knockout.js组件怎么在外部获取其属性和方法

现在有一个Knockout的自定义组件，组件的状态(数据)是自己管理的，外部直接引用这个组件。现在如果我希望在外部获取这个Knockout组件的一些属性和方法，请问我该怎么做呢？因为Knockout没有提供方法来获取组件对象，所以不知道怎么处理。...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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176 views

1 answer

python - How to push events into SDL queue?

I want to push the event keypress "a" into the sdl queue with python. The method sdl2. ... 'TypeError'>: expected LP_SDL_Event instance instead of _ctypes.PyCStructType...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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531 views

1 answer

css - Centrally align grids in material-ui react application

I want to horizontally center Grid items inside a Grid container. Need some spacing between the Grid items as well. ... them as well. Could anyone please help me resolve. Thanks...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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170 views

1 answer

python -m参数

平时自己安装都是直接pip install安装但今天看到一个python -m pip install pymongo，请问这个-m有什么作用吗？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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193 views

1 answer

java - How to get the index of the three highest int's of an array?

I'm trying to get an arry with the 3 biggest scores. I tried this but it doesn't work the way it's supposed to. Can somebody help ... ; max = 0; } return out; // returns [1,1,0] }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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