Tutorial by Examples: am

A program unit which is not an internal subprogram may contain other program units, called internal subprograms. program prog implicit none contains function f() end function f subroutine g() end subroutine g end program Such an internal subprogram has a number of features: t...

import pandas as pd # Save dataframe to pickled pandas object df.to_pickle(file_name) # where to save it usually as a .plk # Load dataframe from pickled pandas object df= pd.read_pickle(file_name)

public class Customer { public void SendEmail() { // Sending email code here } } List<Customer> customers = new List<Customer>(); customers.Add(new Customer()); customers.Add(new Customer()); customers.ForEach(c => c.SendEmail());

Table Item The following class contains 2 properties a name (String) and the size (double). Both properties are wrapped in JavaFX properties to allow the TableView to observe changes. import javafx.beans.property.DoubleProperty; import javafx.beans.property.SimpleDoubleProperty; import javafx.be...

The following example encrypts data by using a hybrid cryptosystem consisting of AES GCM and OAEP, using their default parameter sizes and an AES key size of 128 bits. OAEP is less vulnerable to padding oracle attacks than PKCS#1 v1.5 padding. GCM is also protected against padding oracle attacks. ...

You can use the following extension method for comparing the contents of two IList< T > instances of the same type. By default the items are compared based on their order within the list and the items themselves, passing false to the isOrdered parameter will compare only the items themselves ...

You can bind to a property on a named element, but the named element must be in scope. <StackPanel> <CheckBox x:Name="MyCheckBox" IsChecked="True" /> <TextBlock Text="{Binding IsChecked, ElementName=MyCheckBox}" /> </StackPanel>

If you need to add an attribute through razor that has a - (hyphen) in the name you cannot simply do @Html.DropDownListFor(m => m.Id, Model.Values, new { @data-placeholder = "whatever" }) it will not compile. data-* attributes are valid and common in html5 for adding extra values t...

With TypeScript 1.8 it becomes possible for a type parameter constraint to reference type parameters from the same type parameter list. Previously this was an error. function assign<T extends U, U>(target: T, source: U): T { for (let id in source) { target[id] = source[id]; ...

Class implementation: CLASS lcl_abap_class DEFINITION. PRIVATE SECTION. METHODS method1 IMPORTING iv_string TYPE string CHANGING cv_string TYPE string EXPORTING ev_string TYPE string. ENDCLASS. CLASS lcl_abap_class IMPLEMENTATION. METHOD m...

Class implementation: CLASS lcl_abap_class DEFINITION. PRIVATE SECTION. METHODS method1 RETURNING VALUE(rv_string) TYPE string. ENDCLASS. CLASS lcl_abap_class IMPLEMENTATION. METHOD method1. rv_string = 'returned value'. ENDMETHOD. ENDCLASS. Method call example: ...

To document a function, it is often helpful to have an example script which uses your function. The publish function in Matlab can then be used to generate a help file with embedded pictures, code, links, etc. The syntax for documenting your code can be found here. The Function This function uses ...

Folds are (higher-order) functions used with sequences of elements. They collapse seq<'a> into 'b where 'b is any type (possibly still 'a). This is a bit abstract so lets get into concrete practical examples. Calculating the sum of all numbers In this example, 'a is an int. We have a list of...

Returns a string that represents the unqualified name of a variable, type, or member. int counter = 10; nameof(counter); // Returns "counter" Client client = new Client(); nameof(client.Address.PostalCode)); // Returns "PostalCode" The nameof operator was introduced in C# ...

Differences in subsetting syntax A data.table is one of several two-dimensional data structures available in R, besides data.frame, matrix and (2D) array. All of these classes use a very similar but not identical syntax for subsetting, the A[rows, cols] schema. Consider the following data stored i...

If a covariant type appears as an output, the containing type is covariant. Producing a producer of Ts is like producing Ts. interface IReturnCovariant<out T> { IEnumerable<T> GetTs(); } If a contravariant type appears as an output, the containing type is contravariant. Produc...

Sometimes you want to destructure key under a map which might not be present in the map, but you want a default value for the destructured value. You can do that this way: (def my-map {:a 3 :b 4}) (let [{a :a b :b :keys [c d] :or {a 1 c 2}} my-map] (println ...

Destructurling works in many places, as well as in the param list of an fn: (defn my-func [[_ a b]] (+ a b)) (my-func [1 2 3]) ;= 5 (my-func (range 5)) ;= 3 Destructuring also works for the & rest construct in the param list: (defn my-func2 [& [_ a b]] (+ a b)) (my-func2 1 ...

Destructuring also gives you the ability to interpret a sequence as a map: (def my-vec [:a 1 :b 2]) (def my-lst '("smthg else" :c 3 :d 4)) (let [[& {:keys [a b]}] my-vec [s & {:keys [c d]} my-lst] (+ a b c d)) ;= 10 It is useful for defining functions with named p...

The routing configuration is included in your app/config/config.yml file, by default the app/config/routing.yml file. From there you can link to your own routing configuration in a bundle # app/config/routing.yml app: resource: "@AppBundle/Resources/config/routing.yml" It migh...