insta

一.简介　　 　　LocalDate表示当前(或指定)日期，格式为：yyyy-MM-dd 　　LocalTime表示当前(或指定)时间，格式为：HH:mm:ss SSS 　　LocalDateTime表示当前(或指定)日期时间，格式为：yyyy-MM-ddTHH:mm:ss SSS ,是前2者的结合 　　Instant表示当前(或指定)时间瞬时点，或者瞬间点 二.使用介绍　　 　　jdk1.8之后对表示时间的类型进行了重新编写，表示当前日期时间的有LocalDate、LocalTime、LocalDateTime这三个类，表示瞬间时间点的是Instant 　　api提供了时间类型构造方法、getter方法、时间加减操作、时间判断操作、指定未来时间操作、时间支持的类型操作，其使用方法基本上一致。 　　 LocalDate 　　 LocalTime 　　　 　　 LocalDateTime 　　 Instant LocalDate public class LocalDateTimeTest { public static void main(String[] args) {//============ LoacalDate 的构造 ============ LocalDate localDate = LocalDate.now(); 　　//获取当前时间：2019-12-07

Ceph is one of the most interesting distributed storage systems available, with a very active development and a complete set of features that make it a valuable candidate for cloud storage services. This tutorial goes through the required steps (and some related troubleshooting), required to setup a Ceph cluster and access it with a simple client using librados. Please refer to the Ceph documentation for detailed insights on Ceph components. ( Part 2/3 – Troubleshooting - Part 3/3 – librados client ) Assumptions Ceph version: 0.79 Installation with ceph-deploy Operating system for the Ceph

来源： https://www.jb51.net/article/74409.htm PHP5的另一个新成员是instdnceof关键字。使用这个关键字可以确定一个对象是类的实例、类的子类，还是实现了某个特定接口，并进行相应的操作。在某些情况下，我们希望确定某个类是否特定的类型，或者是否实现了特定的接口。instanceof操作符非常适合完成这个任务。instanceof操作符检查三件事情：实例是否某个特定的类型，实例是否从某个特定的类型继承，实例或者他的任何祖先类是否实现了特定的接口。例如，假设希望了解名为manager的对象是否为类Employee的实例： $manager = new Employee(); … if ($manager instanceof Employee) echo "Yes"; 有两点值得注意。首先，类名没有任何定界符（引号）。使用定界符将导致语法错误。其次，如果比较失败，脚本将退出执行。instanceof关键字在同时处理多个对象时特别有用。例如，你可能要重复地调用某个函数，但希望根据对象类型调整函数的行为。可以使用case语句和instanceof关键字来实现这个目标。 来源： https://www.cnblogs.com/laijinquan/p/11925440.html

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm following a MEAN stack tutorial that requires me to have express installed: I run this: npm install -g express-generator and this is my results: username@username-Inspiron-3521:~$ npm install -g express-generator /home/username/npm/bin/express -> /home/username/npm/lib/node_modules/express-generator/bin/express express-generator@4.13.1 /home/username/npm/lib/node_modules/express-generator ├―― sorted-object@1.0.0 ├―― mkdirp@0.5.1 (minimist@0.0.8) └―― commander@2.7.1 (graceful-readlink@1.0.1) but when I do express --ejs flapper-news The

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm kind of a noob in the android world, and doing a pet project for exercising. It's a very simple reminder-like app with just two activities. One is a customized ListView display the existing alarms. There are some buttons in it to start the other one, which is for add/edit alarms. There is a button in it lead to the previous ListView activity. There is a weird situation I ran into recently. My app works fine. But the problem is, whenever I trigger the add/edit activity then go back to the ListView, and re-run(or I should say re-install?)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: My OS is win10 and the version of QT is Qt5.7 mingw53_32 and the target os is win10. when I use qmlscene to excute a qml file, it occurred some error: qrc:/[...].qml:3 module "QtWebView" is not installed My qml file is following. import QtQuick 2.0 import QtQuick.Controls 1.0 import QtWebView 1.1 ScrollView { width: 1280 height: 720 WebView { id: webview url: "http://www.baidu.com" anchors.fill: parent onNavigationRequested: { // detect URL scheme prefix, most likely an external link var schemaRE = /^\w+:/; if (schemaRE.test(request.url)) {

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to work on media extractor for audio streaming of OGG file format on android. I have written some code with help of google documents. but it doesn't work at all. May be i have Written a wrong code or syntax As i am student. it show me failed to instantiate extractor public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); MediaExtractor extractor = new MediaExtractor(); extractor.setDataSource("http://examplelink.com/ogg");// I cant put real link so sorry for

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I need to check whether email client is installed on a device or not. I have used the following code but it does not work for me. public boolean isIntentAvailable () { final PackageManager packageManager = getApplicationContext (). getPackageManager (); final Intent intent = new Intent ( Intent . ACTION_SEND ); intent . putExtra ( Intent . EXTRA_EMAIL , "vin@gmail.com" ); List < ResolveInfo > list = packageManager . queryIntentActivities ( intent , PackageManager . GET_META_DATA ); return list . size () > 0 ; } 回答1: Use this, works

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: From within a virtual environment, trying to load a script which uses matplotlib 's GTKAgg backend, I fail with the following traceback: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/user/.virtualenvs/venv/local/lib/python2.7/site-packages/matplotlib/pyplot.py", line 97, in <module> _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup() File "/home/user/.virtualenvs/venv/local/lib/python2.7/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup globals(),locals(),

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I was going through the documentation for single instance and was trying out few samples. In one of my sample I have three activities: A->B->C , where B has android:launchMode="singleInstance" in manifest. Activity A and C has default launch mode. Scenario: After navigating to C via A and B (i.e A->B->C), back button press from Activity C takes to Activity A (C->A), but back button press from Activity A does not quit the app, rather brings the Activity B to front, then back button press from Activity B quits the app. Question Why does