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Update git commit author date when amending
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FTR, looks like on OS X, date doesn't know -R. Using date without options did the job anyway
– ksol
Feb 2 '12 at 10:29
7
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App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
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显示已配对的SPP经典蓝牙列表：
选择一个蓝牙设备进行连接：
断开当前连接的设备：
错误处理：
常见问题解决
Error 515: Not connected to a Bluetooth device. ...
How to add /usr/local/bin in $PATH on Mac
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While you can do this, it's not the OS X way. Paths on OS X are built using /usr/libexec/path_helper, called from the default /etc/profile. Start at man path_helper then add your paths in files in /etc/paths.d. You will find that pretty much every path setting ...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
...nstall gcc # for Debian, Ubuntu, etc.
yum install gcc # for RedHat, CentOS, etc.
brew install gcc # for Mac OS X
The Hard Way
GCC says the answer here is "the hard way" because it builds everything piece by piece, and does not use shared libraries.
GCC infrastructure
Get the GCC infrastru...
What's the meaning of Base SDK, iOS deployment target, Target, and Project in xcode
...base SDK to 7, what does it mean? It could mean that the app would run on iOS 7. But that's what iOS deployment target is for.
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Greenlet Vs. Threads
...alls that would normally block the current thread, projects like gevent expose this concurrency without requiring change to an asynchronous API, and at significantly less cost to your system.
Concurrency is not parallelism
Threads vs. processes
Multiprocessing vs. threads
GIL vs. CPython
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npm global path prefix
...houldn't have to do it.
Run this:
npm config get prefix
The default on OS X is /usr/local, which means that npm will symlink binaries into /usr/local/bin, which should already be on your PATH (especially if you're using Homebrew).
So:
npm config set prefix /usr/local if it's something else, a...
Java NIO FileChannel versus FileOutputstream performance / usefulness
...leChannel.transferFrom(). The key advantage here is that the JVM uses the OS's access to DMA (Direct Memory Access), if present. (This is implementation dependent, but modern Sun and IBM versions on general purpose CPUs are good to go.) What happens is the data goes straight to/from disc, to the b...
multiprocessing: How do I share a dict among multiple processes?
...ble than pyshmht library that uses tons of memory and doesn't work for Mac OS. Though my dict only works for plain strings and is immutable currently.
I use linear probing implementation and store keys and values pairs in a separate memory block after the table.
from mmap import mmap
import struct
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What is the difference between connection and read timeout for sockets?
...nite loop, but the attempt to connect can be unblocked by another thread closing the socket. (A Thread.interrupt() call may also do the trick ... not sure.)
3) What does read timeout set to "infinity" mean? In what situation can it remain in an infinite loop? What can trigger that the infinite...