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ios - What is meant By Optional Value? -

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June 15, 2013

how use optional value in swift language?

optional value unwrapped value of variable,which means value of variable can nil.

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java - Intellij IDEA shortcut How to add new element (ex. class or package)? -

September 15, 2015

in eclipse or spring tools suite, add new class or package, example, shortcut ctrl+n. there corresponding shortcut in intellij idea? if in project view, press alt+insert (new) | class. project view can activated via alt+1 .

tcpdump - How to check if server received packet (acknowledged) -

March 15, 2013

i running tcpdump on server capture traffic between server (servera) , remote server (serverb). not know how read output tcpdump. point out if serverb acknowledging packets being sent servera being received serverb? here tcpdump log: 2015-03-31 11:32:18.038284 ip (tos 0x0, ttl 64, id 30781, offset 0, flags [df], proto tcp (6), length 60) servera.14033 > serverb.8004: flags [s], cksum 0x02bd (correct), seq 337482636, win 14600, options [mss 1460,nop,nop,ts val 506588081 ecr 0,nop,wscale 7], length 0 0x0000: 4500 003c 783d 4000 4006 bae4 0a04 7a0e e.. servera.14033: flags [s.], cksum 0x3b2a (correct), seq 1742982091, ack 337482637, win 4140, options [mss 1380,nop,wscale 0], length 0 0x0000: 4500 0030 5ff2 0000 f606 5d3b cefd b48a e..0_.....];.... 0x0010: 0a04 7a0e 1f44 36d1 67e3 cbcb 141d 938d ..z..d6.g....... 0x0020: 7012 102c 3b2a 0000 0204 0564 0103 0300 p..,;*.....d.... 2015-03-31 11:32:18.078622 ip (tos 0x0, ttl 64, id 30782, offset 0, flags [

android - How to share phone contacts in xmpp smack? -

May 15, 2011

i developing chat application using xmpp smack problem how send phone contact information users.i struct here can body me. you can send message stanza containing contact info. afaik there not particular xep present contact sharing.