angularjs

笔记,记录了一名PHPer整了 ROS 两个月左右的一些文档

拟墨画扇 提交于 2020-08-06 21:31:32
文章记录了近期整了两个月左右过程中用到的一些资料,整理下来,有些乱... 建议要是能用 Docker 安装 ROS 的话,就尽量少去折腾环境,留出时间研究 ROS 入门文档 ROS_Robot_Programming_CN.PDF 提取码: kzeg 官方中文 Wiki 文档 Python 示例代码 使用 Python 读取 scan topic 的方法! 导入 LDS 的 msg 数据类型包名 import rospy from sensor_msgs.msg import LaserScan 查看 Topic 消息内容 rostopic echo /kobuki/lase/scan -n1 输出 header: seq: 5 stamp: secs: 2829 nsecs: 69000000 frame_id: "laser_sensor_link" angle_min: -1.57079994678 angle_max: 1.57079994678 angle_increment: 0.00436940183863 time_increment: 0.0 scan_time: 0.0 range_min: 0.10000000149 range_max: 30.0 ranges: [inf, inf, inf, inf, inf, ....] 查看消息类型 rosmsg

checkbox横向选择

我们两清 提交于 2020-08-06 21:31:20
在ASP.NET MVC中,有使用angularjs,下面这个小功能,就是对表格里的checkbox进行横向选择。 先看下面演示: html: 以上的checkbox ng-click事件: 来源: oschina 链接: https://my.oschina.net/u/4297014/blog/4286384

Firebase is not defined?

只谈情不闲聊 提交于 2020-08-06 12:58:05
问题 I'm working on an Angular project and use Firebase, and it's erroring with ReferenceError: Firebase is not defined , but I can not figure out why. this is my index.html <!DOCTYPE html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>My Contacts App</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="bower_components/foundation/css/foundation.css"> <link rel="stylesheet" href="app.css"> </head>

Firebase is not defined?

可紊 提交于 2020-08-06 12:57:06
问题 I'm working on an Angular project and use Firebase, and it's erroring with ReferenceError: Firebase is not defined , but I can not figure out why. this is my index.html <!DOCTYPE html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>My Contacts App</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="bower_components/foundation/css/foundation.css"> <link rel="stylesheet" href="app.css"> </head>

在angular2使用ngrx

自作多情 提交于 2020-08-06 10:10:49
在项目数据全局状态管理上,在react框架使用的是Redux; Redux是为了解决应用程序状态(State)管理而提出的一种解决方案。从单项数据流方面说,redux中将整个状态都集中在一个JavaScript对象树中。然后通过数据变更也就是通知,而将组件变更动作储存在store 仓库中。等到使用 时候 使用this.store.dispacth分发 通过下面在项目使用ngrx: 首先创建 store文件夹中,再创建actions reducers selectors 三个文件 1, 在reducer 初始化state 状态,和值 export enum ModalType { Register = "register", LoginByPhone = "loginByPhone", Share = 'share', Like = 'like', Default = 'default' } //初始化State类型 export interface MemberState { modalVisible: boolean; modalType: ModalType } //初始化State的值 export const initialState: MemberState = { modalVisible: false, modalType: ModalType.Default } /

开发一个大型后台管理系统,应该用前后端分离的技术方案吗?

♀尐吖头ヾ 提交于 2020-08-06 09:45:07
话说这天,我们团队开会讨论了一个问题,不,与其说“讨论”,不如说“争吵”更合适。 背景是这样的: 我们要开发一个 xxx 后台管理系统,这个系统业务复杂、功能又多,大家的争吵集中在“这个系统是否应该用前后端分离的方案”。 这次争吵的问题比较典型,于是我就写了这篇文章。为了大家好理解,把“xxx 后台管理系统”泛化一下,变成: 开发一个大型后台管理系统,应该用前后端分离的技术方案吗? 先说一下,本文中的观点肯定有人不认同,再加上我对前端技术掌握有限,所以大家批判的看吧。 1. 先审题,冷静的分析一下 前后端分离的优点多多,这不需要多说,大家人人都清楚。 来,讨论之前,我们先一起好好审审题。 结合“ 开发一个大型后台管理系统 ”这个约束条件,冷静的分析一下: • 什么是后台管理系统:首先后台管理系统这个称呼,意味着这是一个 B 端系统 。可以小到部门级应用(客户投诉登记系统、办公设备台账系统),大一点可以是大集团级核心系统(500 强保险公司客服、呼叫中心),可以是 ERP、CRM、OA(SAP、用友、泛微协同),可以是一个 B2C 电商的商城后台、支付网关管理控制台,可以是 Saas 的管理后台(Salesforce、Teambition、Jira),可以大到阿里云控制台…… • 什么是大型:我理解大型系统是指功能模块多、交互复杂,而不是访问量、TPS、数据量大。所以 CMS、OA

Looking for a Dual Listbox with AngularJS and Bootstrap

馋奶兔 提交于 2020-08-06 07:40:11
问题 I am looking for a component like this to be included in my project: http://geodan.github.io/duallistbox/sample-100.html I want to install it with npm. The problem is that I tested some of the examples which are over there, but without success (I get exceptions, or there is no npm, only bower) These are the examples I tested. https://github.com/alexklibisz/angular-dual-multiselect-directive https://github.com/frapontillo/angular-bootstrap-duallistbox http://www.bootply.com/mRcBel7RWm Any

Looking for a Dual Listbox with AngularJS and Bootstrap

ε祈祈猫儿з 提交于 2020-08-06 07:40:10
问题 I am looking for a component like this to be included in my project: http://geodan.github.io/duallistbox/sample-100.html I want to install it with npm. The problem is that I tested some of the examples which are over there, but without success (I get exceptions, or there is no npm, only bower) These are the examples I tested. https://github.com/alexklibisz/angular-dual-multiselect-directive https://github.com/frapontillo/angular-bootstrap-duallistbox http://www.bootply.com/mRcBel7RWm Any

What does double colon before expression variable do in angular js?

杀马特。学长 韩版系。学妹 提交于 2020-08-06 07:39:09
问题 In angularjs, what is a double colon :: before an expression variable, and what is the difference between {{ firstName }} and {{ ::firstName }} ? 回答1: Taken from: https://www.binpress.com/tutorial/speeding-up-angular-js-with-simple-optimizations/135 It reads: One-time binding syntax {{ ::value }} AngularJS dropped a really interesting feature recently in the beta version of 1.3.0: the ability to render data once and let it persist without being affected by future Model updates. This is

cookie is not shown in chrome developer tools

旧街凉风 提交于 2020-08-06 07:28:57
问题 i am using node/express server and angularjs as frontend. server sets the cookie and is shown correctly in the network response. but the cookie is not shown in the resource tab in the chrome developer tools. What are the possible reasons for the same. 回答1: Below are 2 potential reasons for not actually setting a valid cookie: Invalid expiration time - the cookie expires at a time in the past from the browser's perspective Invalid domain for the cookie. Let's say you serve the page from