大约有 13,922 项符合查询结果（耗时：0.0270秒） [XML]
Python 3 ImportError: No module named 'ConfigParser'
...lternatives? I tried PyMySQL3-0.5 but its very buggy, it crashes at first execute call.
– if __name__ is None
Dec 30 '12 at 14:46
15
...
ItemsControl with horizontal orientation
...
To do this in a resource file, you need to set the x:Key key
– Tore Aurstad
Mar 27 '19 at 11:50
|
show 1 more commen...
is_file or file_exists in PHP
...is_file() will return false if the given path points to a directory. file_exists() will return true if the given path points to a valid file or directory. So it would depend entirely on your needs. If you want to know specifically if it's a file or not, use is_file(). Otherwise, use file_exists().
...
Why does ReSharper tell me “implicitly captured closure”?
...y of the lambdas inside this method stay alive.
Take a look at the short example
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
int i = 0;
Random g = new Random();
this.button1.Click += (sender, args) => this.label1.Text = i++.ToString();
this.button2.Click +...
How to print instances of a class using print()?
...n't know about it, but in retrospect it makes perfect sense given Python 2.x's broken Unicode handling.
– Chris Lutz
Oct 8 '09 at 5:36
11
...
Disable Interpolation when Scaling a
NOTE : This has to do with how existing canvas elements are rendered when scaled up , not to do with how lines or graphics are rendered onto a canvas surface . In other words, this has everything to do with interpolation of scaled elements , and nothing to do with antialiasing of graphics b...
Cluster analysis in R: determine the optimal number of clusters
...he Q are... unclear to me):
n = 100
g = 6
set.seed(g)
d <- data.frame(x = unlist(lapply(1:g, function(i) rnorm(n/g, runif(1)*i^2))),
y = unlist(lapply(1:g, function(i) rnorm(n/g, runif(1)*i^2))))
plot(d)
One. Look for a bend or elbow in the sum of squared error (SSE) scree ...
Static methods in Python?
...corator
class MyClass(object):
@staticmethod
def the_static_method(x):
print(x)
MyClass.the_static_method(2) # outputs 2
Note that some code might use the old method of defining a static method, using staticmethod as a function rather than a decorator. This should only be used if ...
Determining the last changelist synced to in Perforce
...to which the sync occured strictly deleted files from the workspace, the next-highest changelist will be reported (unless it, too, strictly deleted files).
If you must sync first and record later, Perforce recommends running the following command to determine if you've been bit by the above gotcha...
Is there a function to make a copy of a PHP array to another?
...confused by intricacies such as ArrayObject, which is an object that acts exactly like an array. Being an object however, it has reference semantics.
Edit: @AndrewLarsson raises a point in the comments below. PHP has a special feature called "references". They are somewhat similar to pointers in la...