mkaz

10 Scala One Liners to Impress Your Friends

Here are 10 one-liners which show the power of scala programming, impress your friends and woo women; ok, maybe not. However, these one liners are a good set of examples using functional programming and scala syntax you may not be familiar with. I feel there is no better way to learn than to see real examples.

Updated: June 17, 2011 - I'm amazed at the popularity of this post, glad everyone enjoyed it and to see it duplicated across so many languages. I've included some of the suggestions to shorten up some of my scala examples. Some I intentionally left longer as a way for explaining / understanding what the functions were doing, not necessarily to produce the shortest possible code; so I'll include both.

1. Multiple Each Item in a List by 2

The map function takes each element in the list and applies it to the corresponding function. In this example, we take each element and multiply it by 2. This will return a list of equivalent size, compare to o

nolanlawson

Promises puzzle answer sheet

Solution to https://twitter.com/nolanlawson/status/578948854411878400.

Puzzle #1

doSomething().then(function () {

diogovk

 defmodule Stuff do
   def inlist([search_item|_tail], search_item), do:  true
 
   def inlist([_head|tail], search_item) , do: inlist(tail, search_item)
 
   def inlist([], _), do: false
 
 end
 
 IO.inspect(Stuff.inlist([1,2,3],1))

pbojinov

Two way iframe communication

The main difference between the two pages is the method of sending messages. Recieving messages is the same in both.

Parent

Send messages to iframe using iframeEl.contentWindow.postMessage Recieve messages using window.addEventListener('message')

iframe

kevin-smets

Default

Powerlevel10k

gyllstromk

  Ember.Handlebars.registerBoundHelper('markdown', function (content) {
        return new Handlebars.SafeString(markdown.toHTML(content));
  });