Tutorial by Examples: nd

With turbolinks, the traditional approach to using: $(document).ready(function() { // awesome code }); won't work. While using turbolinks, the $(document).ready() event will only fire once: on the initial page load. From that point on, whenever a user clicks a link on your website, turbolink...

Application visits are initiated by clicking a Turbolinks-enabled link, or programmatically by calling Turbolinks.visit(location) By default, the visit function uses the 'advance' action. More understandably, the default behavior for the visit function is to advance to the page indicated by the ...

Go to the DOWNLOAD ANACONDA NOW page. Beneath the “Graphical Installer” buttons for Anaconda for macOS, there are command-line text links for Python versions 2.7 and 3.6. Download the command line installer for Anaconda with Python 2.7 or Anaconda with Python 3.6. Optional: Verify data integrity w...

$pwd Displays the present working directory. $who Displays all the users logged in. $who am i Shows the username of the current user. $date Displays the current system date $which <command> Shows the path of the specified command. For example "$which pwd" will sho...

Optionals type, which handles the absence of a value. Optionals say either "there is a value, and it equals x" or "there isn't a value at all". An Optional is a type on its own, actually one of Swift’s new super-powered enums. It has two possible values, None and Some(T), where ...

on your elements.html file, run the following commands: cd PATH/TO/IMPORTFILE/ vulcanize elements.html -o elements.vulc.html --strip-comments --inline-css --inline-js crisper --source elements.vulc.html --html build.html --js build.js Vulcanize retrieved source code of all the imports, then re...

For this example we will use the Live Test RavenDB instance. We will build a simple console app here which demonstrates the most basic operations: Creation Retrieval by Id Querying Updating Deletion Begin by creating a new Visual Studio solution and add a Console Application project to it...

If you try and create a recursive enum in Rust without using Box, you will get a compile time error saying that the enum can't be sized. // This gives an error! enum List { Nil, Cons(i32, List) } In order for the enum to have a defined size, the recursively contained value must be in...

func loginHandler(w http.ResponseWriter, r *http.Request) { // Steps to login } func main() { http.HandleFunc("/login", loginHandler) http.ListenAndServe(":8080", nil) }

// logger middlerware that logs time taken to process each request func Logger(h http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { startTime := time.Now() h.ServeHttp(w,r) endTime := time.Since(startTime) log...

func Recovery(h http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request){ defer func() { if err := recover(); err != nil { // respondInternalServerError } }() h.ServeHTTP(w , r) }...

If all you need is serializing mongo results into json, it is possible to use the json module, provided you define custom handlers to deal with non-serializable fields types. One advantage is that you have full power on how you encode specific fields, like the datetime representation. Here is a ha...

Import a Mongoose Model (See topic "Mongoose Schemas") var User = require("../models/user-schema.js") The findOne method will return the first entry in the database that matches the first parameter. The parameter should be an object where the key is the field to look for and th...

You can bind the callback function. new Vue({ el:"#star-wars-people", data:{ people: null }, mounted:function(){ $.getJSON("http://swapi.co/api/people/", function(data){ this.people = data.results; }.bind(this)); } })

This example shows how you can install and run WSO2 API Manager in your machine. For this example API Manager 2.1.0 version is used. You can install WSO2 API Manager in two ways. Download the API Manager product from product website. Checkout the source code from GitHub, build the source code ...

If a file may contain Windows or Unix-like line endings (or even a mixture of both) then the intended text replacement may not work as expected. Sample: $ echo -e 'Entry 1\nEntry 2.1\tEntry 2.2\r\nEntry 3\r\n\r\n' \ > | awk -F'\t' '$1 != "" { print $1 }' \ > | hexdump -c 0000000...

Copying files copy copies the source file in the first argument to the destination in the second argument. The resolved destination needs to be in a directory that is already created. if (copy('test.txt', 'dest.txt')) { echo 'File has been copied successfully'; } else { echo 'Failed to ...

List can contain n number of items. The items in list are separated by comma >> a = [1,2,3] To access an element in the list use the index. The index starts from 0 >> a[0] >> 1 Lists can be nested. >> nested_list = [ [1,2,3], ['a','b','c'] ] >> nested_list...

Calling C code from Go package main /* // Everything in comments above the import "C" is C code and will be compiles with the GCC. // Make sure you have a GCC installed. int addInC(int a, int b) { return a + b; } */ import "C" import "fmt" func ma...

(From this answer) The example below adds an enumerated type to a postgres database. First, edit the migration file (created with mix ecto.gen.migration): def up do # creating the enumerated type execute("CREATE TYPE post_status AS ENUM ('published', 'editing')") # creating a...