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Make the current commit the only (initial) commit in a Git repository?
...h is misleading - the history will still exist it just won't be accessible from that branch. If you have tags, for example, which point to older commits, these commits will be accessible. In fact, for anyone with a bit of git foo, I'm sure that after this git push, they will still be able to recover...
How do I get both STDOUT and STDERR to go to the terminal and a log file?
...ome reason, 2>&1 | tee -a filename wasn't saving stderr to the file from my script, but it worked fine when I copied the command and pasted it into the terminal! The bracket trick works fine, though.
– Ed Brannin
Jul 29 '09 at 2:11
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NSOperation vs Grand Central Dispatch
...tions and NSOperationQueues with blocks and dispatch queues. This has come from how I've used both technologies in practice, and from the profiling I've performed on them.
First, there is a nontrivial amount of overhead when using NSOperations and NSOperationQueues. These are Cocoa objects, and the...
How can I determine the URL that a local Git repository was originally cloned from?
I pulled a project from GitHub a few days ago. I've since discovered that there are several forks on GitHub, and I neglected to note which one I took originally. How can I determine which of those forks I pulled?
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support FragmentPagerAdapter holds reference to old fragments
... with a tag that is unknown to you. This is by design; you are discouraged from messing with the fragments that the view pager is managing. You should be performing all your actions within a fragment, communicating with the activity, and requesting to switch to a particular page, if necessary.
Now,...
Why does sizeof(x++) not increment x?
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From the C99 Standard (the emphasis is mine)
6.5.3.4/2
The sizeof operator yields the size (in bytes) of its operand, which may be an expression or the parenthesized name of a type. The size is determined from the ty...
How do you Force Garbage Collection from the Shell?
...rm program.
Fire it up like so:
java -jar jmxterm-1.0-alpha-4-uber.jar
From there, you can connect to a host and trigger GC:
$>open host:jmxport
#Connection to host:jmxport is opened
$>bean java.lang:type=Memory
#bean is set to java.lang:type=Memory
$>run gc
#calling operation gc of mb...
Is there some way to PUSH data from web server to browser?
...erver message-based communication.
You can easily initiate the connection from javascript:
var ws = new WebSocket("ws://your.domain.com/somePathIfYouNeed?args=any");
ws.onmessage = function (evt)
{
var message = evt.data;
//decode message (with JSON or something) and do the needed
};
The se...
Java SecurityException: signer information does not match
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This happens when classes belonging to the same package are loaded from different JAR files, and those JAR files have signatures signed with different certificates - or, perhaps more often, at least one is signed and one or more others are not (which includes classes loaded from directories ...
Collect successive pairs from a stream
...of(stream). There are other convenient static methods to create the stream from Collection, array, Reader, etc. Edited the answer.
– Tagir Valeev
May 30 '15 at 16:06
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