大约有 46,000 项符合查询结果(耗时:0.0592秒) [XML]
jQuery vs document.querySelectorAll
I heard several times that jQuery's strongest asset is the way it queries and manipulates elements in the DOM: you can use CSS queries to create complex queries that would be very hard to do in regular javascript .
However , as far as I know, you can achieve the same result with document.querySele...
How to intercept touches events on a MKMapView or UIWebView objects?
...ing wrong but I try to catch touches on a MKMapView object. I subclassed it by creating the following class :
14 Answers
...
No route matches [GET] /assets
...erving static assets. Therefore, you are getting this error. Thin won't do it either, since it's just a wrapper around Rails.
This is controlled by this setting in config/environments/production.rb in your application:
config.serve_static_files = false
Or in Rails 5:
# config/environments/produ...
How do I convert a Ruby class name to a underscore-delimited symbol?
...
Rails comes with a method called underscore that will allow you to transform CamelCased strings into underscore_separated strings. So you might be able to do this:
FooBar.name.underscore.to_sym
But you will have to install ActiveSuppor...
How is the undo tree used in Vim?
... the tree in chronological or reverse-chronological order (which can be a bit confusing, because it can jump arbitrarily between undo branches, but if you do g- long enough you'll always get where you need to go eventually). :earlier and :later take a time descriptor like 7m or 1h; again this can j...
Are there pronounceable names for common Haskell operators? [closed]
... to a -> b: a to b
<- bind (as it desugars to >>=)
<$> (f)map
<$ map-replace by 0 <$ f: "f map-replace by 0"
<*> ap(ply) (as it is the same as Control.Monad.ap)
$ (none, just as " " ...
How To Check If A Key in **kwargs Exists?
...2.3. There were some ideas listed here , which work on regular var's, but it seems **kwargs play by different rules... so why doesn't this work and how can I check to see if a key in **kwargs exists?
...
Best way to handle list.index(might-not-exist) in python?
...pythonic way. ValueError will be raised by the .index method only, because it's the only code you have there!
To answer the comment:
In Python, easier to ask forgiveness than to get permission philosophy is well established, and no index will not raise this type of error for any other issues. Not t...
Cleaner way to do a null check in C#? [duplicate]
...
In a generic way, you may use an expression tree and check with an extension method:
if (!person.IsNull(p => p.contact.address.city))
{
//Nothing is null
}
Full code:
public class IsNullVisitor : ExpressionVisitor
{
public bool IsNull { get; private set; }
public ob...
Making a request to a RESTful API using python
... }
},
{
"text": {
"record.articleTitle": "farmers"
}
}
],
"must_not": [],
"should": []
}
},
"from": 0,
"size": 50,
"sort": [],
"facets": {}
}'''
response = requests.post(url, data=data)
Depending on what kin...