小编Loa*_*...的帖子

The example Dockerfile given on the Elixir Phoenix Guides appears to be outdated and broken. The example is found here: https://hexdocs.pm/phoenix/releases.html#containers

I created a vanilla application like like so: mix phx.new hello_world

The broken Dockerfile:

# FROM elixir:1.9.0-alpine as build

# install build dependencies
RUN apk add --update git build-base nodejs yarn python

# prepare build dir
RUN mkdir /app
WORKDIR /app

# install hex + rebar
RUN mix local.hex --force && \
    mix local.rebar --force

# set build ENV …

I'm not sure when to use mix and when to use phoenix for creating umbrella applications.

I have read a lot of articles online but they are not clear of the reasoning for using mix over phoenix and vis versa.

mix gives:

- apps/
- config/

phoenix gives:

- build/dev/(consolidated/lib)
- apps/(app_name/app_name_web)
- config/(configs for different envs)
- deps/(stuffffff)

mix new [UMBRELLA NAME] --umbrella VS mix phx.new [UMBRELLA NAME] --umbrella

If I want to generate an umbrella that has an …

要获取 IEx 中模块上所有函数的列表，我可以运行：

Map.__info__(:functions)
# or
Enum.__info__(:functions)

使用{Module}.__info__(:functions)格式。

如何获取所有标准库模块的列表？

我有一个包含多个 Dragula 容器的页面。容器中ul有一堆li。我希望用户能够li在他们的容器中重新排序's，但我不希望lifrom 一个容器可以拖动到另一个容器。现在我可以将 each 拖到liany ul。如何将li's限制为仅使用其原始容器？

html：

<ul id="first">
  <li>for first group only</li>
  <li>for first group only</li>
  <li>for first group only</li>
</ul>

<ul id="second">
  <li>for second group only</li>
  <li>for second group only</li>
  <li>for second group only</li>
</ul>

<ul id="third">
  <li>for third group only</li>
  <li>for third group only</li>
  <li>for third group only</li>
</ul>

js：

var first = '#first';
var second = '#second';
var third = '#third';

var …

我正在尝试使用asdf安装Erlang（及更高版本的Elixir），但是jinterface由于安装过程似乎冻结而出现错误：

?  ~ asdf install erlang 22.1.1
Downloading OTP-22.1.1.tar.gz to /Users/me/.asdf/plugins/erlang/kerl-home/archives
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   122    0   122    0     0    320      0 --:--:-- --:--:-- --:--:--   321
100 52.4M    0 52.4M    0     0  7604k      0 --:--:--  0:00:07 --:--:-- 9203k
Extracting source code
Building Erlang/OTP 22.1.1 (asdf_22.1.1), please wait...
APPLICATIONS DISABLED (See: /Users/me/.asdf/plugins/erlang/kerl-home/builds/asdf_22.1.1/otp_build_22.1.1.log)
 * jinterface     : Java compiler disabled by user

DOCUMENTATION INFORMATION (See: /Users/me/.asdf/plugins/erlang/kerl-home/builds/asdf_22.1.1/otp_build_22.1.1.log) …