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What is the behavior difference between return-path, reply-to and from?
...er already exists in the message, then that header is removed and replaced by the recipient's mail server.
All bounces that occur during the SMTP session should go back to the Return-Path address. Some servers may accept all email, and then queue it locally, until it has a free thread to deliver i...
How do I select a merge strategy for a git rebase?
...t rebase --strategy recursive --strategy-option theirs ${branch} as stated by the documentation)
From Git v1.7.3 Release Notes:
git rebase --strategy <s> learned the --strategy-option/-X option to pass extra options that are understood by the chosen merge strategy.
NB: "Ours" and "theirs" ...
Is it possible to disable floating headers in UITableView with UITableViewStylePlain?
...
You should be able to fake this by using a custom cell to do your header rows. These will then scroll like any other cell in the table view.
You just need to add some logic in your cellForRowAtIndexPath to return the right cell type when it is a header row...
What are Runtime.getRuntime().totalMemory() and freeMemory()?
...the total amount of memory in the Java virtual machine. The value returned by this method may vary over time, depending on the host environment.
Note that the amount of memory required to hold an object of any given type may be implementation-dependent.
maxMemory()
Returns the maximum amount of m...
What is the >>>= operator in C?
Given by a colleague as a puzzle, I cannot figure out how this C program actually compiles and runs. What is this >>>= operator and the strange 1P1 literal? I have tested in Clang and GCC. There are no warnings and the output is "???"
...
Need some clarification about beta/alpha testing on the developer console
...ing, closed testing, pausing tracks and stage rollouts, don't get confused by these terms.
1. Open testing - It means that you don't need to invite them, like no need to take their Gmail and add it to the user list. (Beta testing)
2. Closed testing - It means that you need to specifically add the us...
Difference between sh and bash
...sh
sh (or the Shell Command Language) is a programming language described by the POSIX
standard.
It has many implementations (ksh88, dash, ...). bash can also be
considered an implementation of sh (see below).
Because sh is a specification, not an implementation, /bin/sh is a symlink
(or a hard li...
Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java
...UNIX) and according to range:
1-127 are user defined codes (so generated by calling exit(n))
128-255 are codes generated by termination due to different unix signals like SIGSEGV or SIGTERM
But I don't think you should care while coding on Java, it's just a bit of information. It's useful if you...
How can I determine whether a Java class is abstract by reflection
...a Jar file and wish to find those which are not abstract. I can solve this by instantiating the classes and trapping InstantiationException but that has a performance hit as some classes have heavy startup. I can't find anything obviously like isAbstract() in the Class.java docs.
...
What is the difference between print and puts?
...a newline after each argument. That's a key point and not clear from the Ruby docs (since the example has only 1 argument).
– cdunn2001
Jul 29 '12 at 23:49
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