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What does FETCH_HEAD in Git mean?
... Alexey: FETCH_HEAD corresponds to the tip of the remote branch specified by branch.<BRANCH>.merge in the local repository configuration. So while fetch does indeed fetch all object data from the remote storage, FETCH_HEAD is used to indicate to where the remote branch tracked by the local b...
What is Vim recording and how can it be disabled?
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You start recording by q<letter>
and you can end it by typing q again.
Recording is a really useful feature of Vim.
It records everything you type. You can then replay it simply by typing @<letter>.
Record search, movement, replace...
Is there a reason that we cannot iterate on “reverse Range” in ruby?
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A range is just that: something defined by its start and end, not by its contents. "Iterating" over a range doesn't really make sense in a general case. Consider, for example, how you would "iterate" over the range produced by two dates. Would you iterate by day? b...
How to Loop through items returned by a function with ng-repeat?
I want to create divs repeatedly, the items is objects returned by a function. However the following code report errors:
10 $digest() iterations reached. Aborting! jsfiddle is here: http://jsfiddle.net/BraveOstrich/awnqm/
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Why is spawning threads in Java EE container discouraged?
...within the environment are meant to be managed, and potentially monitored, by the server. Also, much of the context in which a thread is being used is typically attached to the thread of execution itself. If you simply start your own thread (which I believe some servers will not even allow), it ca...
Side-by-side plots with ggplot2
I would like to place two plots side by side using the ggplot2 package , i.e. do the equivalent of par(mfrow=c(1,2)) .
13...
GROUP BY to combine/concat a column [duplicate]
...XML PATH (''))
, 1, 1, '') AS URLList
FROM TableName AS a
GROUP BY [User], Activity
SQLFiddle Demo
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【解决】VNC:No configured security type is supported by 3.3 viewer - ...
【解决】VNC:No configured security type is supported by 3.3 viewerno-configured-security-type-is-supported-by-3.3-vnc-viewer远端机器安装了RealVNC的服务端后，客户端机器连接报错：No configured security type is supported by 3 3 viewer。解决方法：1、远端机器RealVNC...
Transaction isolation levels relation with locks on table
...s only committed. This means A writes data and B can't read the data saved by A until A executes a commit. The problem here is that C can update data that was read and used on B and B client won't have the updated data.
REPEATABLE READ - lock on a block of SQL(which is selected by using select query...
How is CountDownLatch used in Java Multithreading?
...ntDownLatch.await() will wait until count reaches zero or it's interrupted by another thread. All other threads are required to count down by calling CountDownLatch.countDown() once they are completed or ready.
As soon as count reaches zero, the waiting thread continues. One of the disadvantages/a...