Tutorial by Examples: p

An template can be introduced with template. It can contain functions and classes and other constructs. template StaticArray(Type, size_t Length) { class StaticArray { Type content[Length]; size_t myLength() { return getLength(this); }...
When two nodes are not of the same type, React doesn't try to match them - it just removes the first node from the DOM and inserts the second one. This is why the first tip says If you see yourself alternating between two components classes with very similar output, you may want to make it the sa...
Recommended way to install Slim framework is by using composer. Create an empty directory This directory will contain all required files for our Slim application to run. We call this directory root directory so we can address all other application files and directories relative to root directo...
When you use GROUP BY clause, SQL Server query optimizer (QO) can choose different types of grouping operators: HASH Aggregate that creates hash-map for grouping entries Stream Aggregate that works well with pre-ordered inputs You can explicitly require that QO picks one or another aggregate ...
Specifies the max degree of parallelism for the query specifying this option. SELECT OrderID, AVG(Quantity) FROM Sales.OrderLines GROUP BY OrderID OPTION (MAXDOP 2); This option overrides the MAXDOP configuration option of sp_configure and Resource Governor. If MAXDOP is set to zero then...
By using the method GET_SUBMATCH of class CL_ABAP_MATCHER, we can get the data in the groups/subgroups. Goal: get the token to the right of the keyword 'Type'. DATA: lv_pattern TYPE string VALUE 'type\s+(\w+)', lv_test TYPE string VALUE 'data lwa type mara'. CREATE OBJECT ref_regex EX...
JSON_MODIFY function uses JSON text as input parameter, and modifies a value on the specified path using third argument: declare @json nvarchar(4000) = N'{"Id":1,"Name":"Toy Car","Price":34.99}' set @json = JSON_MODIFY(@json, '$.Price', 39.99) print @json -...
JSON_MODIFY has 'append' mode that appends value into array. declare @json nvarchar(4000) = N'{"Id":1,"Name":"Toy Car","Tags":["toy","game"]}' set @json = JSON_MODIFY(@json, 'append $.Tags', 'sales') print @json -- Output: {"Id&quot...
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Create a new text file named HelloWorld.java and paste this code in it: import org.eclipse.swt.*; import org.eclipse.swt.layout.*; import org.eclipse.swt.widgets.*; public class HelloWorld { public static void main(String[] args) { final Display display = new Display(); ...
rpar :: Strategy a executes the given strategy (recall: type Strategy a = a -> Eval a) in parallel: import Control.Concurrent import Control.DeepSeq import Control.Parallel.Strategies import Data.List.Ordered main = loop where loop = do putStrLn "Enter a number" ...
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:ReleaseBundle.properties</value> </list> </bean>
try: metadata = metadata['properties'] except KeyError: pass
Add Firebase to Your Android Project Add Firebase to your app To add Firebase to your app you'll need a Firebase project and a Firebase configuration file for your app. Create a Firebase project in the Firebase console, if you don't already have one. If you already have an existing Google proje...
Parameters can be specified in path property of route configuration 'use strict'; const Hapi = require('hapi'); // Create a server with a host and port const server = new Hapi.Server(); server.connection({ host: 'localhost', port: 8000 }); // Add a route path with url par...
TextBox txt = (TextBox)FindControl(yourtxt_Id);
In Rust, there are two main methods to indicate something has gone wrong in a program: A function returning a (potentially custom-defined) Err(E), from the Result<T, E> type and a panic!. Panicking is not an alternative for exceptions, which are commonly found in other languages. In Rust, a p...
To view all elements in the index change the print options that “sparsifies” the display of the MultiIndex. pd.set_option('display.multi_sparse', False) df.groupby(['A','B']).mean() # Output: # C # A B # a 1 107 # a 2 102 # a 3 115 # b 5 92 # b 8 98 # c 2 87 # c 4 104 #...

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