<div dir="ltr"><div> From my experience with lua its treating %s as any whitespace, starts with any number of spaces, then it says anything after the spaces non greedy, then followed by a string, ending with that string<br>
<br></div>More info here: <a href="http://lua-users.org/wiki/PatternsTutorial">http://lua-users.org/wiki/PatternsTutorial</a><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jul 18, 2014 at 10:10 AM, Sean Devoy <span dir="ltr"><<a href="mailto:sdevoy@bizfocused.com" target="_blank">sdevoy@bizfocused.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hi All,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I have modified this excellent example LUA script (<a href="https://confluence.freeswitch.org/display/FREESWITCH/Lua+Intercom+example" target="_blank">https://confluence.freeswitch.org/display/FREESWITCH/Lua+Intercom+example</a>) to return “true” if an
extension is in use and “false” otherwise”. Just FYI: this is great for Cisco phones because an auto-answer (intercom) connection will interrupt the current call unless you block ALL intercom use. With this I can sent intercom if not in use, or send as a
standard call otherwise. My complements to the original chef!<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">My request is for someone to explain the pattern matching pattern used in this function:<u></u><u></u></p>
<p class="MsoNormal" style="line-height:15.0pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333"> function trim (s)</span><span style="font-size:10.5pt;font-family:Consolas;color:#333333"><u></u><u></u></span></p>
<p class="MsoNormal" style="line-height:15.0pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333"> return (string.gsub(s, "^%s*(.-)%s*$", "%1"))</span><span style="font-size:10.5pt;font-family:Consolas;color:#333333"><u></u><u></u></span></p>
<p class="MsoNormal" style="line-height:15.0pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333"> end</span><span style="font-size:10.5pt;font-family:Consolas;color:#333333"><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">It takes a string like this:<u></u><u></u></p>
<p class="MsoNormal">“uuid,direction,created,created_epoch,name,state,cid_name,cid_num,ip_addr,dest,application,application_data,dialplan,context,read_codec,read_rate,read_bit_rate,write_codec,write_rate,write_bit_rate,secure,hostname,presence_id,presence_data,callstate,callee_name,callee_num,callee_direction,call_uuid,sent_callee_name,sent_callee_num<u></u><u></u></p>
<p class="MsoNormal">d7bd917c-efca-4333-81f6-692c727069a2,inbound,2014-07-18 11:59:41,1405699181,sofia/external_noauth/<a href="mailto:4107673000@66.241.96.237" target="_blank">4107673000@66.241.96.237</a>,CS_EXECUTE,+14107673000,4107673000,66.241.96.237,BOOKKEEPING,voicemail,default voicemail_ESTA 40,XML,from-internal-ESTA,L16,8000,128000,PCMU,8000,64000,,<a href="http://fs_bfis.bizfocused.com" target="_blank">fs_bfis.bizfocused.com</a>,<a href="mailto:4107673000@66.241.96.237" target="_blank">4107673000@66.241.96.237</a>,,ACTIVE,,,,,,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">1 total.”<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">or just this:<u></u><u></u></p>
<p class="MsoNormal">“<u></u><u></u></p>
<p class="MsoNormal">0 total.”<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">And returns just the number and the “Total.” at the end, like “1 total.” Or “0 total.”<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I am fairly regex pattern savvy so I understand pattern matching, but I cannot decipher this LUA pattern. I see it works, but I would like to understand how/why.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks as always,<u></u><u></u></p>
<p class="MsoNormal">Sean <u></u><u></u></p>
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