大约有 44,000 项符合查询结果（耗时：0.0538秒） [XML]
How do I pass the this context to a function?
...
Javascripts .call() and .apply() methods allow you to set the context for a function.
var myfunc = function(){
alert(this.name);
};
var obj_a = {
name: "FOO"
};
var obj_b = {
name: "BAR!!"
};
Now you can call:
myfunc.call(obj...
How do I use itertools.groupby()?
I haven't been able to find an understandable explanation of how to actually use Python's itertools.groupby() function. What I'm trying to do is this:
...
What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
Is there any differences in invoking variables with syntax ${var} and $(var) ? For instance, in the way the variable will be expanded or anything?
...
Correct way to use get_or_create?
...
@zypro It's like create(), create object and save it all in one step and doesn't need any save()
– Amin Mir
Jun 19 at 6:05
add a comment
...
Line continuation for list comprehensions or generator expressions in python
...ry much is that it appears at the end of a line, where it either doesn't stand out or needs extra padding, which has to be fixed when line lengths change:
x = very_long_term \
+ even_longer_term_than_the_previous \
+ a_third_term
In such cases, use parens:
x = (very_long_...
Java Equivalent of C# async/await?
...user960567: You need to distinguish between the version of C# you're using and the version of .NET you're using. async/await is a language feature - it was introduced in C# 5. Yes, you can use Microsoft.Bcl.Async to use async/await targeting .NET 4, but you've still got to use a C# 5 compiler.
...
How to determine the content size of a UIWebView?
...ce we do both frame changes right after each other, the view isn't updated and doesn't flicker.
Of course, we have to wait until the content has been loaded, so we put the code into the -webViewDidFinishLoad: delegate method.
Obj-C
- (void)webViewDidFinishLoad:(UIWebView *)aWebView {
CGRect f...
Is there a numpy builtin to reject outliers from a list
...numpy builtin to do something like the following? That is, take a list d and return a list filtered_d with any outlying elements removed based on some assumed distribution of the points in d .
...
java: HashMap not working
...primitive type, you can read what does mean a primitive type in java here, and a Map is an interface that has to objects as input:
public interface Map<K extends Object, V extends Object>
object means a class, and it means also that you can create an other class that exends from it, but you...
binning data in python with scipy/numpy
... of an array in prespecified bins? for example, i have an array of numbers and an array corresponding to bin start and end positions in that array, and I want to just take the mean in those bins? I have code that does it below but i am wondering how it can be cut down and improved. thanks.
...