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How would I get a cron job to run every 30 minutes?
... every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0.
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Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
I would like install R on my laptop Mac OS X version 10.7.3
6 Answers
6
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socket.shutdown vs socket.close
...r required,
the calling program can discard the
socket by applying a close subroutine
to the socket descriptor. If a
reliable delivery socket has data
associated with it when a close takes
place, the system continues to attempt
data transfer. However, if the data is
still undelivered...
How can I convert an image into a Base64 string?
...You can use the Base64 Android class:
String encodedImage = Base64.encodeToString(byteArrayImage, Base64.DEFAULT);
You'll have to convert your image into a byte array though. Here's an example:
Bitmap bm = BitmapFactory.decodeFile("/path/to/image.jpg");
ByteArrayOutputStream baos = new ByteArray...
Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...盘开发实战因工作需要，最近与同事合作使用Dokan开发了一个虚拟磁盘的简单程序，初步实现了远程目录映射到本地虚拟磁盘的功能。远程服务端是用Python...因工作需要，最近与同事合作使用Dokan开发了一个虚拟磁盘的简单程序...
How to close Android application?
I want to close my application, so that it no longer runs in the background.
22 Answers
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Output to the same line overwriting previous output?
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Here's code for Python 3.x:
print(os.path.getsize(file_name)/1024+'KB / '+size+' KB downloaded!', end='\r')
The end= keyword is what does the work here -- by default, print() ends in a newline (\n) character, but this can be replaced with a different string...
Static method behavior in multi-threaded environment in java
...d try and explain at a slightly more simple level for anybody who comes across this and is newish to Java. Here goes..
Memory in java is split up into two kinds - the heap and the stacks. The heap is where all the objects live and the stacks are where the threads do their work. Each thread has its ...
What is the difference between a thread and a fiber?
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In the most simple terms, threads are generally considered to be preemptive (although this may not always be true, depending on the operating system) while fibers are considered to be light-weight, cooperative threads. Both are separ...
How to insert a newline in front of a pattern?
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This works in bash and zsh, tested on Linux and OS X:
sed 's/regexp/\'$'\n/g'
In general, for $ followed by a string literal in single quotes bash performs C-style backslash substitution, e.g. $'\t' is translated to a literal tab. Plus, sed wants your newline literal to...