Tutorial by Examples: b

Some times you need to debug python code which is executed by another process and and in this cases rpdb comes in handy. rpdb is a wrapper around pdb that re-routes stdin and stdout to a socket handler. By default it opens the debugger on port 4444 Usage: # In the Python file you want to debu...

--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...

--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...

--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...

bookmarks, bookmark: create a new bookmark or list existing bookmarks branch: set or show the current branch name tag: add one or more tags for the current or given revision update, up, checkout, co: update working directory (or switch revisions)

FNR contains the number of the input file row being processed. In this example you will see awk starting on 1 again when starting to process the second file. Example with one file $ cat file1 AAAA BBBB CCCC $ awk '{ print FNR }' file1 1 2 3 Example with two files $ cat file1 AAAA BBBB...

In Scala (in contrast to Java and most other languages), if is an expression instead of a statement. Regardless, the syntax is identical: if(x < 1984) { println("Good times") } else if(x == 1984) { println("The Orwellian Future begins") } else { println("Po...

You can use browser.debugger() to stop the execution. You can insert it any place in your code and it will stop the execution after that line until you don't command to continue. Note: To run the tests in debugger mode you have to issue command like this: `protractor debug <configuration.fi...

C++14 Parameter pack unpacking traditionally requires writing a helper function for each time you want to do it. In this toy example: template<std::size_t...Is> void print_indexes( std::index_sequence<Is...> ) { using discard=int[]; (void)discard{0,((void)( std::cout <&...

Given the following file: hello how are you i am fine let's go, you! let's go, baby! grep with look-behind allows to print only some parts: $ grep -Po "(?<=let's go, ).*" file you! baby! In this case, it matches what occurs after "let's go, ".

runOutsideAngular can be used to run code outside Angular 2 so that it does not trigger change detection unnecessarily. This can be used to for example run multiple HTTP request to get all the data before rendering it. To execute code again inside Angular 2, run method of NgZone can be used. my.com...

// Global.asax.cs calls this method at application start public static void Register(HttpConfiguration config) { // New code config.EnableCors(); } //Enabling CORS for controller after the above registration [EnableCors(origins: "http://example.com", headers: "*"...

public static void Register(HttpConfiguration config) { var corsAttr = new EnableCorsAttribute("http://example.com", "*", "*"); config.EnableCors(corsAttr); }

public void ConfigureServices(IServiceCollection services) { services.AddCors(o => o.AddPolicy("MyPolicy", builder => { builder.AllowAnyOrigin() .AllowAnyMethod() .AllowAnyHeader(); })); // ... } public void Configur...

public void ConfigureServices(IServiceCollection services) { services.AddMvc(); services.AddCors(); services.ConfigureCors(options => options.AddPolicy("AllowSpecific", p => p.WithOrigins("http://localhost:1233") ...

This example is not tied to any concrete GUI toolkit, like reactive-banana-wx does, for instance. Instead it shows how to inject arbitary IO actions into FRP machinery. The Control.Event.Handler module provides an addHandler function which creates a pair of AddHandler a and a -> IO () values. Th...

To represent continious signals, reactive-banana features Behavior a type. Unlike Event, a Behavior is an Applicative, which lets you combine n Behaviors using an n-ary pure function (using <$> and <*>). To obtain a Behavior a from the Event a there is accumE function: main = do (...

When applied to a property of a domain class, the database will create a NOT NULL column. using System.ComponentModel.DataAnnotations; public class Person { public int PersonID { get; set; } [Required] public string PersonName { get; set; } } The resulting column wi...

[MaxLength(int)] attribute can be applied to a string or array type property of a domain class. Entity Framework will set the size of a column to the specified value. using System.ComponentModel.DataAnnotations; public class Person { public int PersonID { get; set; } [MinLength(...

Title This band is showed once at the beginning of the report. It can be used as first page by setting the attribute isTitleNewPage="true" Page Header This appears at the beginning of each page excluding first page if Title band is used and last page if Summary band is used with setting...