小编Tri*_*eil的帖子

我有一个看起来像这样的数组.

[{"EntryId"=>"2", "Field1"=>"National Life Group","DateCreated"=>"2010-07-30 11:00:14", "CreatedBy"=>"tristanoneil"},
 {"EntryId"=>"3", "Field1"=>"Barton Golf Club", "DateCreated"=>"2010-07-30 11:11:20", "CreatedBy"=>"public"},
 {"EntryId"=>"4", "Field1"=>"PP&D Brochure Distribution", "DateCreated"=>"2010-07-30 11:11:20", "CreatedBy"=>"public"}, 
 {"EntryId"=>"5", "Field1"=>"Prime Renovation Group, DreamMaker Bath & Kitchen",  "DateCreated"=>"2010-07-30 11:11:21", "CreatedBy"=>"public"}
]

我将如何迭代遍历此数组,以便我可以指定要打印的字段并获取值,因此我可以执行类似的操作.

puts EntryId.value

我正在尝试使用Elixir中的Google Maps地理编码API,虽然我对该语言有点新,因此使用嵌套数据结构正在逃避我.

我正在使用HTTPotion从地理编码端点获取JSON,并使用JSEX将其解析为Elixir数据结构(一系列嵌套列表和元组).

defmodule Geocode do
  def fetch do
    HTTPotion.start
    result = HTTPotion.get "http://maps.googleapis.com/maps/api/geocode/json?address=Fairfax,%20Vermont&sensor=false"
    json   = JSEX.decode result.body
  end
end

以下内容现已分配给json.

{:ok, [{"results", [[{"address_components", [[{"long_name", "Fairfax"}, {"short_name", "Fairfax"}, {"types", ["locality", "political"]}], [{"long_name", "Franklin"}, {"short_name", "Franklin"}, {"types", ["administrative_area_level_2", "political"]}], [{"long_name", "Vermont"}, {"short_name", "VT"}, {"types", ["administrative_area_level_1", "political"]}], [{"long_name", "United States"}, {"short_name", "US"}, {"types", ["country", "political"]}]]}, {"formatted_address", "Fairfax, VT, USA"}, {"geometry", [{"bounds", [{"northeast", [{"lat", 44.772892}, {"lng", -72.92268890000001}]}, {"southwest", [{"lat", 44.6330508}, {"lng", -73.08477409999999}]}]}, {"location", [{"lat", 44.6654963}, {"lng", -73.01032}]}, {"location_type", "APPROXIMATE"}, {"viewport", [{"northeast", [{"lat", 44.772892}, …

我正在尝试使用has_many:through方法建立多对多关系,然后使用多选字段来设置关系.我正在学习本教程:

http://asciicasts.com/episodes/185-formtastic-part-2

但是由于某种原因,表单会显示一个奇怪的十六进制数字并且它会更改每个页面刷新,我不确定我做错了什么.下面是我的模型/视图代码.

company.rb

has_many :classifications
has_many :sics, :through => :classifications

sic.rb

has_many :classifications
has_many :companies, :through => :classifications

classification.rb

belongs_to :company
belongs_to :sic

_form.html.erb

<% semantic_form_for @company do |f| %>
  <% f.inputs do %>
    <%= f.input :company %>
    <%= f.input :sics %>
  <% end %>
  <%= f.buttons %>
<% end %>

此外,表格看起来像是显示该字段的正确条目数,但显然没有显示该关系的正确名称.

SIC Multi-Select http://web9.twitpic.com/img/103694166-98ad71116216d3d1b12dd77690b36248.4bf6ca20-full.jpg

我试图以编程方式添加几个从TextViews一个延伸到一个的Tiles RelativeLayout.

我的代码如下.

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

for (int i = 0; i < characters.length; i++) {
    Tile tile = new Tile(this);
    tile.setText(Character.toString(characters[i]));
    tile.setId(i);
    if (i != 0) {
        params.addRule(RelativeLayout.RIGHT_OF, i - 1);
    }
    _display.addView(tile, params);
}

所以我正在创建一个新的LayoutParams被调用实例类,params并添加一个规则来将每个tile对齐到前一个tile的右侧.当我运行应用程序时,看起来瓷砖彼此重叠.有什么建议？