大约有 23,000 项符合查询结果（耗时：0.0344秒） [XML]
MySQL WHERE: how to write “!=” or “not equals”?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
How to change 'Maximum upload size exceeded' restriction in Shiny and save user file inputs?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Rails create or update magic?
...
Rails 5, 4, and 3
Not if you are looking for an "upsert" (where the database executes an update or an insert statement in the same operation) type of statement. Out of the box, Rails and ActiveRecord have no such feature. You can use the upsert gem, however.
Otherwise, you can use: find_or_initi...
Can you overload controller methods in ASP.NET MVC?
...g distinct, i.e., HttpGet or HttpPost, but not both. That way it can tell based on the type of request which method to use.
[HttpGet]
public ActionResult Show()
{
...
}
[HttpPost]
public ActionResult Show( string userName )
{
...
}
One suggestion I have is that, for a case like this, woul...
Easiest way to read from a URL into a string in .NET
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Get the distance between two geo points
...
An approximated solution (based on an equirectangular projection), much faster (it requires only 1 trig and 1 square root).
This approximation is relevant if your points are not too far apart. It will always over-estimate compared to the real haversi...
Android equivalent of NSUserDefaults in iOS
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Rerender view on browser resize with React
...I just want to provide a modified version of her solution, without jQuery, based on this answer.
var WindowDimensions = React.createClass({
render: function() {
return <span>{this.state.width} x {this.state.height}</span>;
},
updateDimensions: function() {
var w...
javascript: Clear all timeouts?
... that Opera, Safari, Chrome and IE > 8 starts timeout ids from 1, Gecko-based browsers from 2 and IE <= 8 from some random number that is magically saved across tab refresh. You can discover it yourself.
All that meens that in IE <=8 the while (lastTimeoutId--) cycle may run over 8digits t...
Project structure for Google App Engine
... app
lib
__init__.py - common functionality, including a request handler base class
controllers - contains all the handlers. request.yaml imports these.
templates
all the django templates, used by the controllers
model
all the datastore model classes
static
static files (css, images, etc)...