大约有 30,000 项符合查询结果（耗时：0.0461秒） [XML]
What's an elegant way to conditionally add a class to an HTML element in a view?
...usually you should represent success with boolean true or a numeric record ID, and failure with boolean false or nil. This way you can just test your variable:
<div class="<%= 'ok' if @success %>">
A second form using the ternary ?: operator is useful if you want to choose between tw...
Drawing a line/path on Google Maps
... List<Overlay> mapOverlays;
private Projection projection;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
linearLayout = (LinearLayout) findViewById(R.id.zoomview);
mapView = (MapView) findView...
Formula to determine brightness of RGB color
...
Do you mean brightness? Perceived brightness? Luminance?
Luminance (standard for certain colour spaces): (0.2126*R + 0.7152*G + 0.0722*B) [1]
Luminance (perceived option 1): (0.299*R + 0.587*G + 0.114*B) [2]
Luminance (perceived o...
What is a Windows Handle?
...handle) - the handle should therefore be treated as simply an opaque value meaningful only to the API.
I should add that in any modern operating system, even the so-called "real pointers" are still opaque handles into the virtual memory space of the process, which enables the O/S to manage and rear...
What is an example of the Liskov Substitution Principle?
... the Board class and the inherited methods from the Board class lose their meaning. A unit of code attempting to use the ThreeDBoard class as its base class Board would be very out of luck.
Maybe we should find another approach. Instead of extending Board, ThreeDBoard should be composed of Board ob...
Safari 3rd party cookie iframe trick no longer working?
... party cookies in Safari was as follows: use some javascript to POST to a hidden iframe. It (used to) trick Safari into thinking that the user had interacted with the 3rd party content and so then allow cookies to be set.
...
List OrderBy Alphabetical Order
...
If you mean an in-place sort (i.e. the list is updated):
people.Sort((x, y) => string.Compare(x.LastName, y.LastName));
If you mean a new list:
var newList = people.OrderBy(x=>x.LastName).ToList(); // ToList optional
...
Search of table names
...
The only thing it normally hides are the database diagram support tables, or is there only one. It's more useful when looking for functions/procedures.
– RichardTheKiwi
Oct 26 '12 at 13:23
...
c#: getter/setter
I saw something like the following somewhere, and was wondering what it meant. I know they are getters and setters, but want to know why the string Type is defined like this. Thanks for helping me.
...
Django Forms: if not valid, show form with error message
I Django forms, it can check whether the form is valid:
7 Answers
7
...