Tutorial by Examples: t

var sourceFileName = "NonExistingFile"; try { System.IO.File.Copy(sourceFileName, "DestinationFile"); } catch (Exception e) { var stdErr = Console.Error; stdErr.WriteLine($"Failed to copy '{sourceFileName}': {e.Message}"); }

var errors = new System.Text.StringBuilder(); var process = new Process { StartInfo = new ProcessStartInfo { RedirectStandardError = true, FileName = "xcopy.exe", Arguments = "\"NonExistingFile\" \"DestinationFile\"", ...

To get the list of Elixir modules just type h Elixir.[TAB] Pressing [TAB] autocompletes modules and functions names. In this case it lists all modules. To find all functions in a module e.g. List use h List.[TAB]

For rendering multiple props or variables we can use ``. render() { let firstName = 'test'; let lastName = 'name'; return ( <View style={styles.container}> <Text>{`${firstName} ${lastName}` } </Text> </View> ); } Output: te...

php -S localhost:80 PHP 7.1.7 Development Server started at Fri Jul 14 15:11:05 2017 Listening on http://localhost:80 Document root is C:\projetos\repgeral Press Ctrl-C to quit. This is the simplest way to start a PHP server that responds to request made to localhost at the port 80. The -S...

php -S localhost:80 -t project/public router.php PHP 7.1.7 Development Server started at Fri Jul 14 15:22:25 2017 Listening on http://localhost:80 Document root is /home/project/public Press Ctrl-C to quit.

The PXDBDateAndTime attribute and the PXDateAndTime attribute are designed to work with a DAC field of the Nullable<DateTime> (DateTime?) type and store both date and time value parts inside a single field: #region UsrDateAndTime public abstract class usrDateAndTimeAttribute : IBqlField { }...

The PXDBTime attribute is designed to work with a DAC field of the Nullable<DateTime> (DateTime?) type and store only the time part without date inside a DAC field: #region UsrTime public abstract class usrTime : IBqlField { } [PXDBTime(DisplayMask = "t", InputMask = "t&qu...

The PXDBDate attribute and the PXDate attribute are designed to work with a DAC field of the Nullable<DateTime> (DateTime?) type and store date value with an optional time part inside a single field. Wheather PX(DB)DateAttribute should save time in addition to date in a DAC field is defined by...

The PXDBTimeSpan attribute is designed to work with a DAC field of the Nullable<int> (int?) type and store time value inside a DAC field as the number of minutes passed since midnight: #region UsrTimeInt public abstract class usrTimeInt : IBqlField { } [PXDBTimeSpan(DisplayMask = "t...

The PXTimeList attribute is designed to work with a DAC field of the Nullable<int> (int?) type and store time span value inside a DAC field as a number of minutes: #region UsrTimeSpan public abstract class usrTimeSpan : IBqlField { } [PXDBInt] [PXTimeList] [PXUIField(DisplayName = &quo...

This returns a map without the key-value pairs for the keys mentioned in the function argument. It can be used to remove information from existing map. (dissoc {:a 1 :b 2} :a) ;; {:b 2} It can also be used for dissocing multiple keys as: (dissoc {:a 1 :b 2 :c 3} :a :b) ;; {:c 3}

This is a weird approach most of the people don't know this even exist. CREATE TABLE AliasNameDemo(id INT,firstname VARCHAR(20),lastname VARCHAR(20)) INSERT INTO AliasNameDemo VALUES (1,'MyFirstName','MyLastName') SELECT * FROM (SELECT firstname + ' ' + lastname FROM A...

This syntax will be similar to using AS keyword. Just we don't have to use AS keyword CREATE TABLE AliasNameDemo (id INT,firstname VARCHAR(20),lastname VARCHAR(20)) INSERT INTO AliasNameDemo VALUES (1,'MyFirstName','MyLastName') SELECT FirstName +' '+ LastName FullName FROM AliasNa...

├───models │ ├───user.model.js ├───routes │ ├───user.route.js ├───services │ ├───user.service.js ├───controllers │ ├───user.controller.js For modular code structure the logic should be divided into these directories and files. Models - The schema definition of the Model Rou...

user.model.js var mongoose = require('mongoose') const UserSchema = new mongoose.Schema({ name: String }) const User = mongoose.model('User', UserSchema) module.exports = User; user.routes.js var express = require('express'); var router = express.Router(); var UserController...

If the promise doesn't return anything, the async task can be completed using await. try{ await User.findByIdAndUpdate(user._id, { $push: { tokens: token } }).exec() }catch(e){ handleError(e) }

The RelayCommand<T> is similar to the RelayCommand, but allows to directly pass an object to the command. It implements the ICommand interface and can therefore be used to bind to Commands in XAML (e.g. as the Command property of the Button element). You can then use the CommandParameter prope...

The ObservableObject class contains some helpful methods to help with the MVVM pattern. The RaisePropertyChanged provides a compile safe method to raise property changed events. It can be called with RaisePropertyChanged(() => MyProperty); The Set method can be used in the property setter t...

Tables are most easily included with the DT package, which is an R interface to the JavaScript library DataTables. library(shiny) library(DT) ui <- fluidPage( dataTableOutput('myTable') ) server <- function(input, output, session){ output$myTable <- renderDataTable({ dat...