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Convert Unix timestamp to a date string
...ecognizes neither -d nor -r and provides no standard way in any command at all (that I know of) to format a Unix time from the command line (since POSIX Awk also lacks strftime()). (You can't use touch -t and ls because the former does not accept a time given as seconds since the Unix Epoch.)
Note...
No module named MySQLdb
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You need to use one of the following commands. Which one depends on what OS and software you have and use.
easy_install mysql-python (mix os)
pip install mysql-python (mix os/ python 2)
pip install mysqlclient (mix os/ python 3)
apt-get install python-mysqldb (Linux Ubuntu, ...)
cd /usr/ports/da...
Android 4.3 Bluetooth Low Energy unstable
...ect and create a fresh instance of gatt on each connect.
Don't forget to call android.bluetooth.BluetoothGatt#close()
Start a new thread inside onLeScan(..) and then connect. Reason: BluetoothDevice#connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback) always fails, if ...
How to best position Swing GUIs?
...bles a native window shown without programmatically setting its location. Most windowing systems cascade windows if their locations are not explicitly set. The actual location is determined once the window is shown on the screen.
Have a look at the effect of this example that puts 3 GUIs into the...
When should we use mutex and when should we use semaphore
... to sleep till you release the mutex.
Spinlock:
Use a spinlock when you really want to use a mutex but your thread is not allowed to sleep.
e.g.: An interrupt handler within OS kernel must never sleep. If it does the system will freeze / crash. If you need to insert a node to globally shared linke...
Catch all JavaScript errors and send them to server
I wondered if anyone had experience in handling JavaScript errors globally and send them from the client browser to a server.
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FixedThreadPool vs CachedThreadPool: the lesser of two evils
...program that spawns threads (~5-150) which perform a bunch of tasks. Originally, I used a FixedThreadPool because this similar question suggested they were better suited for longer lived tasks and with my very limited knowledge of multithreading, I considered the average life of the threads (sev...
GCC compile error with >2 GB of code
...inv2 -
32*s.x12pow2*s.x15*s.x35*s.x45*s.mWpowinv2 -...
right?
If all your functions have a similar "format" (multiply n numbers m times and add the results - or something similar) then I think you can do this:
change the generator program to output offsets instead of strings (i.e. instea...
Java system properties and environment variables
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Finally, it's how the variables are added and the scope of the variables.
– Praveen Sripati
Aug 14 '11 at 12:33
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How can I convert a stack trace to a string?
... If you don't like including an external library for something as small and simple as this, use this answer.
– Stijn de Witt
Jan 31 '12 at 8:31
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