M4rk questions

• Reuse mysql Subquery in InnerJoin
• mongoDB, sum the product of two fields
• What is the equivalent of PHP's list() function in Java?
• XMPP strophe, get presence roster
• Longest positive sum substring
• regex to find url in a text
• Android SearchView on ActionBar, detect click on Search
• ConcurrentHashMap for c++
• How does WebRTC handle many-to-many connections?
• Netty performance

M4rk answers