Tutorial by Examples: pt

In the official reference document, it says: The main function of an inbound Channel Adapter is to execute a SQL SELECT query and turn the result set as a message. The message payload is the whole result set, expressed as a List, and the types of the items in the list depend on the row-mapping st...

In the Spring Integration Reference Docuement, it says: The outbound Channel Adapter is the inverse of the inbound: its role is to handle a message and use it to execute a SQL query. The message payload and headers are available by default as input parameters to the query... Java code p...

<# .DESCRIPTION Writes the metric out in bosun external collector format which is compatible with scollector external scripts .PARAMETER metric Name of the metric (eg : my.metric) .PARAMETER type Type of metric (counter, gauge, etc) .PARAMETER unit ...

React components that are pure functions of their props and do not require any internal state can be written as JavaScript functions instead of using the standard class syntax, as: import React from 'react' const HelloWorld = (props) => ( <h1>Hello, {props.name}!</h1> ); ...

SELECT 1 a, '' b from DUAL; AB1(null)

SELECT 3 * NULL + 5, 'Hello ' || NULL || 'world' from DUAL; 3*NULL+5'HELLO'||NULL||'WORLD'(null)Hello world

import cv2 def canny_webcam(): "Live capture frames from webcam and show the canny edge image of the captured frames." cap = cv2.VideoCapture(0) while True: ret, frame = cap.read() # ret gets a boolean value. True if reading is successful (I think). frame ...

An IP address to an interface could be obtained via DHCP or Static assignment DHCP If you are connected to a network with a DHCP server running, dhclient command can get an IP address for your interface $ dhclient <interface> or alternatively, you could make a change to the /etc/network/...

Main layout : activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_main" android:layout_width="match_parent" android:layo...

UseExceptionHandler can be used to handle exceptions globally. You can get all the details of exception object like Stack Trace, Inner exception and others. And then you can show them on screen. You can easily implement like this. app.UseExceptionHandler( options => { options.Run( as...

Given data Empty a we have data Free Empty a = Pure a -- the Free constructor is impossible! which is isomorphic to data Identity a = Identity a

Given data Empty a we have data Cofree Empty a -- = a :< ... not possible!

Given data Maybe a = Just a | Nothing we have data Cofree Maybe a = a :< Just (Cofree Maybe a) | a :< Nothing which is isomorphic to data NonEmpty a = NECons a (NonEmpty a) | NESingle a

Given data Either e a = Left e | Right a we have data Cofree (Either e) a = a :< Left e | a :< Right (Cofree (Either e) a) which is isomorphic to data Hospitable e a = Sorry_AllIHaveIsThis_Here'sWhy a e | EatThis a (Hospitable e a) or, if yo...

import React, { Component } from 'react'; type Props = { posts: Array<Article>, dispatch: Function, children: ReactElement } class Posts extends Component { props: Props; render () { // rest of the code goes here } }

You can make your plugin customizable by accepting options. $.fn.colourize = function(options) { // This is one method to support default options var style = $.extend({ color: "green", backgroundColor: "white" }, options); // Set the col...

In a string formula field, consider that some values might contain substrings which look to the browser like HTML. Unless this is intentional, it is important to protect the values from corruption. This is useful to avoid injection attacks: it prevents someone from entering HTML into a comment field...

utl_url.escape( expression )

app\Exceptions\Handler.php public function render($request, Exception $exception) { if ($exception instanceof ModelNotFoundException) { abort(404); } return parent::render($request, $exception); } You can catch / handle any exception that is thrown in Laravel.

Implementing the Behavior This behavior will cause mouse wheel events from an inner ScrollViewer to bubble up to the parent ScrollViewer when the inner one is at either its upper or lower limit. Without this behavior, the events will never make it out of the inner ScrollViewer. public class Bubbl...