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Converting from longitude\latitude to Cartesian coordinates
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@starblue: I'm not sure you are in a position to label the given answer "right" or "wrong". The spherical approximation (to get ECEF-style x,y,z coords) using available lat/lngs (that are referenced to WGS-84) is either "adequate" for the original poster's needs, or "not ad...
SVG get text element width
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Great. Allows me to align SVG chart labels statically rather than having to align them on the fly in local script. That makes life a lot simpler when serving up charts in Ruby from RoR. Thanks!
– Lex Lindsey
Mar 31 at 23:3...
Ruby on Rails: Where to define global constants?
...through out the application except in model code as such:
<%= form.label :states, %>
<%= form.select :states, STATES, {} %>
To use the constant in a model, use attr_accessor to make the constant available.
class Customer < ActiveRecord::Base
attr_accessor :STATES
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Django - How to rename a model field using South?
.... A model's database table name is constructed by joining the model's "app label" -- the name you used in manage.py startapp -- to the model's class name, with an underscore between them.
In the case where you have a multi-worded, camel-cased model name, such as ProjectItem, the table name will be...
How do you modify a CSS style in the code behind file for divs in ASP.NET?
... I had trouble using testSpace.Style.Item("display") = "none"; on a label control in .NET 4.0. I got the error 'System.Web.UI.CssStyleCollection' does not contain a definition for 'Item' . . . . Is that specific to a particular .NET version?
– Adam Miller
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Is Hash Rocket deprecated?
...ry. In particular:
You must use the rocket for symbols that are not valid labels: :$set => x is valid but $set: x is not. In Ruby 2.2+ you can get around this problem with quotes: '$set': x will do The Right Thing.
You must use the rocket if you use keys in your Hashes that aren't symbols, such...
项目管理实践【五】自动编译和发布网站【Using Visual Studio with Source ...
...ace the existing virtual directory前面的CheckBox根据实际情况确定是否选中，如下图：
点击确定按钮，编译部署项目StartKit.csproj_deploy，编译成功后，我们打开IIS，在默认网站下可以看到虚拟目录StartKit。OK，成功了！
方法二：使用Web...
Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint
...asons, directly from the log:
NSLayoutConstraint:0xa338390 V:|-(15)-[UILabel:0xa331260] (Names:
'|':UILabel:0xa330270 )>
This we can read as problem in UILabel constraint, it is leading vertical constraint being 15pt long.
NSLayoutConstraint:0x859ab20 H:-(13)-|[UIView:0x85a8fb0]...
...
串口通信器使用指导 · App Inventor 2 中文网
...，直接交给二进制组件，不经过文本转换。00、80、FF 都是普通数据，不是乱码。
通信模型与接线
通过“串口通信器”组件，App 可以通过手机串口进行通信；如果只需无线传输，使用蓝牙/BLE 通信可能是目前...
What are valid values for the id attribute in HTML?
...eriod)
but one should avoid : and . beacause:
For example, an ID could be labelled "a.b:c" and referenced in the style sheet as #a.b:c but as well as being the id for the element, it could mean id "a", class "b", pseudo-s