Tutorial by Examples: d

Introduction

Template Literals act like strings with special features. They are enclosed by by the back-tick `` and can be spanned across multiple lines. Template Literals can contain embedded expressions too. These expressions are indicated by a $ sign and curly braces {} //A single line Template Literal v...

Reading CSV files

Three main functions available (description from man pages): fromfile - A highly efficient way of reading binary data with a known data-type, as well as parsing simply formatted text files. Data written using the tofile method can be read using this function. genfromtxt - Load data from a t...

Custom Styled Map

<!DOCTYPE html> <html> <head> <title>Styled Maps</title> <meta charset="utf-8"> <style> #map { height: 100%; } </style> </head> <body> <div id="map"></div> <script type="t...

Producers

A Producer is some monadic action that can yield values for downstream consumption: type Producer b = Proxy X () () b yield :: Monad m => a -> Producer a m () For example: naturals :: Monad m => Producer Int m () naturals = each [1..] -- each is a utility function exported by Pipes ...

Run script in debug mode

To run script in debug mode you should add -d option in the command line: $perl -d script.pl If t is specified, it indicates to the debugger that threads will be used in the code being debugged: $perl -dt script.pl Additional info at perldocperlrun

AND / OR IF condition

Sometimes a complex IF condition is needed. Let's take and example, Assuming we have the following raw data: ItemIDItem NameItem Status1Item 1Tentative1Item 1Pending1Item 1Approved The Goal is: Let's assume our business user ask to see which items are not approved and which are approved. Tentati...

The Proxy monad transformer

pipes's core data type is the Proxy monad transformer. Pipe, Producer, Consumer and so on are defined in terms of Proxy. Since Proxy is a monad transformer, definitions of Pipes take the form of monadic scripts which await and yield values, additionally performing effects from the base monad m.

Use a nonstandard debugger

$perl -d:MOD script.pl runs the program under the control of a debugging, profiling, or tracing module installed as Devel::MOD. For example, -d:NYTProf executes the program using the Devel::NYTProf profiler. See all available Devel modules here Recommended modules: Devel::NYTProf -- Powerful ...

Moqs are test doubles

Mocks are meant as test doubles, that allow interactions with the mocks to be validated, they are not meant to replace the system you are testing. Examples will often demonstrate features of Moq as follows: // Create the mock var mock = new Mock<IMockTarget>(); // Configure the mock to d...

Introduction of User Controls

User controls are made for reusability across ASP.NET pages, similar to master pages. Instead of sharing base page layout, user controls share group of HTML/ASP.NET built-in server controls or a specific form layout, e.g. comment submission or guest notes. A user control can contain both HTML contr...

Adding Custom Properties for User Control

Like standard ASP.NET built-in server controls, user controls can have properties (attributes) on its definition tag. Suppose you want to add color effect on UserControl.ascx file like this: <uc:UserControl ID="UserControl1" runat="server" Color="blue" /> At t...

Validating call order implicitly

Where a method to be tested uses information from one call to pass on to subsequent calls, one approach that can be used to ensure the methods are called in the expected order is to setup the expectations to reflect this flow of data. Given the method to test: public void MethodToTest() { va...

Validating call order with callbacks

When you can't / don't want to use Strict Mocks, you can't use MockSequence to validate call order. An alternate approach is to use callbacks to validate that the Setup expectations are being invoked in the expected order. Given the following method to test: public void MethodToTest() { _ut...

Validating call order with MockSequence

Moq provides support for validating call order using MockSequence, however it only works when using Strict mocks. So, Given the following method to test: public void MethodToTest() { _utility.Operation1("1111"); _utility.Operation2("2222"); _utility.Operation3(&...

Using redux-thunk with Promises

import 'whatwg-fetch'; function checkStatus(response) { if (response.status >= 200 && response.status < 300) { return response; } const error = new Error(response.statusText); error.response = response; throw error; } function parseJSON(response) { return ...

NumericUpDown

NumericUpDown is control that looks like TextBox. This control allow user to display/select number from a range. Up and Down arrows are updating the textbox value. Control look like; In Form_Load range can be set. private void Form3_Load(object sender, EventArgs e) { numericUpDown...

Handling socket errors

socket_last_error can be used to get the error ID of the last error from the sockets extension. socket_strerror can be used to convert the ID to human-readable strings. function onSocketFailure(string $message, $socket = null) { if(is_resource($socket)) { $message .= ": " ....
PHP • Sockets

UDP server socket

A UDP (user datagram protocol) server, unlike TCP, is not stream-based. It is packet-based, i.e. a client sends data in units called "packets" to the server, and the client identifies clients by their address. There is no builtin function that relates different packets sent from the same c...
PHP • Sockets

Building the C Extension

The C extension is an optional feature of Twig that offers some performance improvements of template rendering. The source code for the extension is located in the Twig source code directory at ext/twig. It compiles like any other PHP extentension: cd ext/twig phpize ./configure make make insta...

Loop Through all Sheets in all Files in a Folder

Sub Theloopofloops() Dim wbk As Workbook Dim Filename As String Dim path As String Dim rCell As Range Dim rRng As Range Dim wsO As Worksheet Dim sheet As Worksheet path = "pathtofile(s)" & "\" Filename = Dir(path & "*.xl??") Set wsO =...

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