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Are empty HTML5 data attributes valid?
...es about empty attributes apply here:
Certain attributes may be specified by providing just the attribute name, with no value.
In the following example, the disabled attribute is given with the empty attribute syntax:
<input disabled>
Note that empty attribute syntax is exactly equivalent to...
Show SOME invisible/whitespace characters in Eclipse
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What does the “@” symbol mean in reference to lists in Haskell?
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Conditional import of modules in Python
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How to copy text to clipboard/pasteboard with Swift
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Get time difference between two dates in seconds
...me() method for the Date objects, and then simply subtract them and divide by 1000 (since it's originally in milliseconds). As an extra, when you're calling the getDate() method, you're in fact getting the day of the month as an integer between 1 and 31 (not zero based) as opposed to the epoch time ...
What is the proper #include for the function 'sleep()'?
...m using the Big Nerd Ranch book Objective-C Programming, and it starts out by having us write in C in the first few chapters. In one of my programs it has me create, I use the sleep function. In the book it told me to put #include <stdlib.h> under the #include <stdio.h> part. This is...
How to synchronize a static variable among threads running different instances of a class in Java?
...e the read operation on count if you want to read the correct value as set by other threads. Declaring it volatile (in addition to synchronized write) will also help with this.
– n0rm1e
Apr 24 '13 at 14:27
...
Android 4.3 Bluetooth Low Energy unstable
...d inside LeScanCallback() {...}.onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) in the same thread on Samsung Galaxy S3 with Android 4.3 (at least for build JSS15J.I9300XXUGMK6)
Most devices filter advertising
Better not use android.bluetooth.BluetoothAdapter#startLeScan(UUID[] servic...
Ruby/Rails: converting a Date to a UNIX timestamp
...
Solution for Ruby 1.8 when you have an arbitrary DateTime object:
1.8.7-p374 :001 > require 'date'
=> true
1.8.7-p374 :002 > DateTime.new(2012, 1, 15).strftime('%s')
=> "1326585600"
...