大约有 40,000 项符合查询结果(耗时:0.0250秒) [XML]

https://stackoverflow.com/ques... 

How can I get the current network interface throughput statistics on Linux/UNIX? [closed]

...$dev/statistics"; my %stats = do { opendir +(my $dh), $dir; local @_ = readdir $dh; closedir $dh; map +($_, []), grep !/^\.\.?$/, @_; }; if (-t STDOUT) { while (1) { print "\033[H\033[J", run(); my ($time, $us) = gettimeofday(); my ($sec, $min, $hour) = l...
https://stackoverflow.com/ques... 

How to implement a binary tree?

...plementation of binary search tree. #!/usr/bin/python class Node: def __init__(self, val): self.l = None self.r = None self.v = val class Tree: def __init__(self): self.root = None def getRoot(self): return self.root def add(self, val): ...
https://stackoverflow.com/ques... 

How to access outer class from an inner class?

...f): return Outer.Inner(self) class Inner(object): def __init__(self, outer_instance): self.outer_instance = outer_instance self.outer_instance.somemethod() def inner_method(self): self.outer_instance.anothermethod() ...
https://stackoverflow.com/ques... 

What is the difference between a static and a non-static initialization code block

...ll instance initialized with this construtor } public MyClass(int _myParam) { if (_myParam > 0) { myField = myField * 4; //myField is worth 20 for all instance initialized with this construtor //if _myParam is greater than 0 } else { ...
https://stackoverflow.com/ques... 

Repeat string to certain length

... def repeat_to_length(string_to_expand, length): return (string_to_expand * ((length/len(string_to_expand))+1))[:length] For python3: def repeat_to_length(string_to_expand, length): return (string_to_expand * (int(length/len(s...
https://stackoverflow.com/ques... 

Python Linked List

...tains a cargo object and a reference to a linked list. class Node: def __init__(self, cargo=None, next=None): self.car = cargo self.cdr = next def __str__(self): return str(self.car) def display(lst): if lst: w("%s " % lst) display(lst.cdr) else: w("nil\n") ...
https://stackoverflow.com/ques... 

How to use filter, map, and reduce in Python 3

... @Breezer actually i**3 will call i.__pow__(3) and i*i*i i.__mul__(i).__mul__(i) (or something like that). With ints it doesn't matter but with numpy numbers/custom classes it might even produce different results. – syntonym ...
https://stackoverflow.com/ques... 

Javascript replace with reference to matched group?

I have a string, such as hello _there_ . I'd like to replace the two underscores with <div> and </div> respectively, using JavaScript . The output would (therefore) look like hello <div>there</div> . The string might contain multiple pairs of underscores. ...
https://stackoverflow.com/ques... 

Named routes _path vs _url

... _path helpers provide a site-root-relative path. You should probably use this most of the time. _url helpers provide an absolute path, including protocol and server name. I've found that I mainly use these in emails when cre...
https://stackoverflow.com/ques... 

How to make a cross-module variable?

The __debug__ variable is handy in part because it affects every module. If I want to create another variable that works the same way, how would I do it? ...