If you return an lvalue expression from a function, and this lvalue:
represents an automatic variable local to that function, which will be destroyed after the return
the automatic variable is not a function parameter
and the type of the variable is the same type as the function's return type
...
Python 2.x2.7
In Python 2 filter, map and zip built-in functions return a sequence. map and zip always return a list while with filter the return type depends on the type of given parameter:
>>> s = filter(lambda x: x.isalpha(), 'a1b2c3')
>>> s
'abc'
>>> s = map(lambd...
In Python 3.x, the reduce function already explained here has been removed from the built-ins and must now be imported from functools.
from functools import reduce
def factorial(n):
return reduce(lambda a, b: (a*b), range(1, n+1))
/// <summary>
/// Registers a background task in the system waiting to trigger
/// </summary>
/// <param name="taskName">Name of the task. Has to be unique</param>
/// <param name="taskEntryPoint">Entry point (Namespace) of the class (has to impl...
/// <summary>
/// Gets a BackgroundTask by its name
/// </summary>
/// <param name="taskName">Name of the task to find</param>
/// <returns>The found Task or null if none found</returns>
public BackgroundTaskRegistration TaskByName(string taskName) ...
/// <summary>
/// Unregister a single background task with given name
/// </summary>
/// <param name="taskName">task name</param>
/// <param name="cancelTask">true if task should be cancelled, false if allowed to finish</param>
public void...
Unlike durations, periods can be used to accurately model clock times without knowing when events such as leap seconds, leap days, and DST changes occur.
start_2012 <- ymd_hms("2012-01-01 12:00:00")
## [1] "2012-01-01 12:00:00 UTC"
# period() considers leap year calculati...
GROUP BY is used in combination with aggregation functions. Consider the following table:
orderIduserIdstoreNameorderValueorderDate143Store A2520-03-2016257Store B5022-03-2016343Store A3025-03-2016482Store C1026-03-2016521Store A4529-03-2016
The query below uses GROUP BY to perform aggregated calc...
-XXaggressive is a collection of configurations that make the JVM perform at a high speed and reach a stable state as soon as possible. To achieve this goal, the JVM uses more internal resources at startup; however, it requires less adaptive optimization once the goal is reached. We recommend that y...
Creating a hub
A quick configuration for a hub and node setup in selenium grid. For more information see: Grid 2 docs
Requirements
To set up a grid hub you need the flowing:
Selenium-server-standalone-.jar
Creating the hub
To Create a Hub you need to run the selenium server.
Download Se...
After you've created and registered your platform-specific classes you can start hooking them up to your shared code. The following page contains a button that triggers the text-to-speech functionality using a pre-defined sentence. It uses DependencyService to retrieve a platform-specific implementa...
' The OrElse operator is the homologous of AndAlso. It lets us perform a boolean
' comparison evaluating the second condition only if the first one is False
If testFunction(5) = True OrElse otherFunction(4) = True Then
' If testFunction(5) is True, otherFunction(4) is not called.
' In...
Given this data
User_IDCompletion_Date12016-07-2012016-07-2122016-07-2022016-07-2122016-07-22
;with CTE as
(SELECT *,
ROW_NUMBER() OVER (PARTITION BY User_ID
ORDER BY Completion_Date DESC) Row_Num
FROM Data)
SELECT * FORM CTE WHERE Row_Num <= n
Us...
First of all you need to create a class which extends RecyclerView.ItemDecoration :
public class SimpleBlueDivider extends RecyclerView.ItemDecoration {
private Drawable mDivider;
public SimpleBlueDivider(Context context) {
mDivider = context.getResources().getDrawable(R.drawable.divider_b...
In normal mode, we can increment the nearest number on the line at or after the cursor with <C-a> and decrement it with <C-x>. In the following examples, the cursor position is indicated by ^.
Incrementing and decrementing numbers
for i in range(11):
^
<C-x> decrements ...
The core idea behind the Feature Branch Workflow is that all feature development should take place in a dedicated branch instead of the master branch. This encapsulation makes it easy for multiple developers to work on a particular feature without disturbing the main codebase. It also means the mast...
