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.../spec/spec_helper.rb:27:in `block (2 levels) in <top (required)>': uninitialized constant ControllerMacros (NameError)

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# test get / 

it 'get index' do
  expect(get: "/").to route_to(controller: "links",
                               action: "index")
end

 it 'get the about page' do
    get :about
    p response

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import java.util.Iterator;
import java.util.NoSuchElementException;

// Introduction:
//
// This is an example class meant to illustrate several differen concepts:
//   * The use of type parameters (i.e. Java generics)
//   * Implementing an iterator over some collection, in this case an array
//   * Implementing the Iterable interface, which enables your collection
//     to work with the Java simple for loops, i.e. (for String s : list)

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apply plugin: 'com.android.application'
apply	plugin:	'kotlin-android'
apply	plugin:	'kotlin-android-extensions'
android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "zl.com.kotlinapp"
        minSdkVersion 15
        targetSdkVersion 25

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# http://stackoverflow.com/questions/8507798/rails-3-1-plugin-gem-dummy-test-app-rspec
# http://namick.tumblr.com/post/17663752365/how-to-create-a-gemified-plugin-with-rails-3-2-rspec

rails plugin new plugin_name --skip-test-unit --dummy-path=spec/dummy
cd plugin_name

# Add rspec-rails to gemspec dev deps
# s.add_development_dependency "rspec-rails"

bundle install

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Elixir installation guide

Version numbers should be the ones you want. Here I do it with the last ones available at the moment of writing.

The simplest way to install elixir is using your package manager. Sadly, at the time of writing only Fedora shows the intention to keep its packages up to date. There you can simply sudo dnf install erlang elixir and you are good to go.

Anyway, if you intend to work with several versions of erlang or elixir at the same time, or you are tied to a specific version, you will need to compile it yourself. Then asdf is your best friend.

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%%计算链表长度尾递归实现
lez(N) -> lez(N, 0).

lez([], Acc) -> Acc;
lez([_ | T], Acc) -> lez(T, Acc + 1).

%% 将某个元素重复n次返回一个链表

dulicate(0,_) ->[];
dulicate(N,DATA) -> [X | dulicate(N-1,X)].

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import com.rabbitmq.client.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

/**
 * rudy
 * 11:43 PM

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package ptos;

import ptop.Sender;

/**
 * rudy
 * 3:15 PM
 * 10/5/17.
 */
public class FanoutExchangeSenderDemo {

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package rr;

import com.rabbitmq.client.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.UnsupportedEncodingException;