在Angular 2中尝试一个代码,它的HTML正在运行但角度代码没有执行它说我从html传递的值不是函数.请帮忙!
HTML:app.html - 我正在尝试显示学生的详细信息.我在角度app.component.ts文件中有一个项目列表,我在HTML页面上调用它工作正常.但是当我将点击事件的值传递给app.component.ts时,它给出了错误并在控制台上显示这不是一个函数.
<div class ="card search">
<h1 class = "search-headline"> Student Directory</h1>
<label class = "search-label"> Search
<span *ngIf = "name">for: {{ name }}</span></label>
<input class = "search-input" #newStudent>
<button class ="btn"
(click)="addstudent(newstudent.value)"
>Add</button>
</div>
<ul class="studentlist cf">
<li class="studlist-item cf" *ngFor="let stud of students" (click)="onClk($event)">
<h2 class="student-name">{{ stud.name }}</h2>
<h3 class="student-emp">{{ stud.Empname }}</h3>
</li>
</ul>Angular component.app.ts:在这里我定义变量并添加click事件以显示名称我从html点击以在UI上显示.与此同时,我已经能够为UI上已添加的列表添加更多名称.
import { Component } from '@angular/core';
@Component({
selector: 'app',
templateUrl: './partials/app.html'
})
export class AppComponent {
name: string;
students: …我在CentOS 6上安装了Rstudio服务器,但我无法从浏览器中的http:// localhost:8787登录到Rstudio .将出现一个标题为"RStudio Initialization Error"的弹出窗口,其中显示消息"无法连接到服务".
我尝试了以下方法来解决错误,但我一直没有成功:
$ sudo rstudio-server verify-installation
rstudio-server stop/waiting
rserver[19273]: ERROR system error 13 (Permission denied) [username=rstudio-server]; OCCURRED AT: core::Error server::launchSession(const std::string&, const core::system::Options&, PidType*) /root/rstudio/src/cpp/server/ServerSessionManager.cpp:223; LOGGED FROM: int main(int, char* const*) /root/rstudio/src/cpp/server/ServerMain.cpp:428
rstudio-server start/running, process 19287
$ id -u supstat1
502 (user name is more than 500)
$ sudo usermod -g rstudio_users supstat1
$ sudo vi /etc/sysconfig/iptables as root
and added the following line(s)
Add -A INPUT -m state --state NEW -m tcp …我无法在centos R中安装rJava,它是安装rhdfs的基础.请帮忙看一下安装rJava时得到的输出.
> install.packages( c("rJava"))
Installing package into ‘/home/training/R/x86_64-redhat-linux-gnu-library/3.1’
(as ‘lib’ is unspecified)
--- Please select a CRAN mirror for use in this session ---
trying URL 'http://ftp.iitm.ac.in/cran/src/contrib/rJava_0.9-6.tar.gz'
Content type 'application/x-gzip' length 567515 bytes (554 Kb)
opened URL
==================================================
downloaded 554 Kb
* installing *source* package ‘rJava’ ...
** package ‘rJava’ successfully unpacked and MD5 sums checked
checking for gcc... gcc -m64 -std=gnu99
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking …