大约有 43,000 项符合查询结果（耗时：0.0746秒） [XML]
How do I implement a callback in PHP?
...icMethod');
This is a safe way to use callable values in general:
if (is_callable($cb2)) {
// Autoloading will be invoked to load the class "ClassName" if it's not
// yet defined, and PHP will check that the class has a method
// "someStaticMethod". Note that is_callable() will NOT ve...
CALayers didn't get resized on its UIView's bounds change. Why?
...ayersOfLayer:(CALayer *)layer
{
if (layer == self.layer)
{
_anySubLayer.frame = layer.bounds;
}
super.layoutSublayersOfLayer(layer)
}
Works for me.
share
|
improve this answer...
In pure functional languages, is there an algorithm to get the inverse function?
...he functional languages have that option. For example:
f :: a -> Int
f _ = 1
This function does not have an inverse.
share
|
improve this answer
|
follow
...
On delete cascade with doctrine2
...de to the foreign key column in the database:
@ORM\JoinColumn(name="father_id", referencedColumnName="id", onDelete="CASCADE")
I also want to point out that the way you have your cascade={"remove"} right now, if you delete a Child object, this cascade will remove the Parent object. Clearly not wh...
What does 'require: false' in Gemfile mean?
...just set :require => false and then in your code have a require 'library_name_here'
– Rob Di Marco
Jan 5 '14 at 13:38
...
window.location.href and window.open () methods in JavaScript
...
What's the difference between using window.open(newUrl, '_self') and location.href = newUrl` ? Both will open the newUrl in the same tab.
– Harry
Sep 15 at 14:56
...
Are PDO prepared statements sufficient to prevent SQL injection?
...or MySQL). Therefore, PDO internally builds the query string, calling mysql_real_escape_string() (the MySQL C API function) on each bound string value.
The C API call to mysql_real_escape_string() differs from addslashes() in that it knows the connection character set. So it can perform the escapin...
Convert tuple to list and back
...
List to Tuple and back can be done as below
import ast, sys
input_str = sys.stdin.read()
input_tuple = ast.literal_eval(input_str)
l = list(input_tuple)
l.append('Python')
#print(l)
tuple_2 = tuple(l)
# Make sure to name the final tuple 'tuple_2'
print(tuple_2)
...
What's the difference between size_t and int in C++?
In several C++ examples I see a use of the type size_t where I would have used a simple int . What's the difference, and why size_t should be better?
...
Amazon S3 boto - how to create a folder?
...der abc/123/ in your bucket, it's a piece of cake with Boto
k = bucket.new_key('abc/123/')
k.set_contents_from_string('')
Or use the console
share
|
improve this answer
|
...