大约有 49,000 项符合查询结果（耗时：0.1033秒） [XML]
How do I return multiple values from a function? [closed]
...t; p.x, p.y
1 2
>>> p[0], p[1]
1 2
In recent versions of Python 3 (3.6+, I think), the new typing library got the NamedTuple class to make named tuples easier to create and more powerful. Inheriting from typing.NamedTuple lets you use docstrings, default values, and type annotations.
Exa...
Standard deviation of a list
...
153
Since Python 3.4 / PEP450 there is a statistics module in the standard library, which has a meth...
Rails: Is there a rails trick to adding commas to large numbers?
...
354
You want the number_with_delimiter method. For example:
<%= number_with_delimiter(@number,...
PHP cURL not working - WAMP on Windows 7 64 bit
...
309
Go to http://www.anindya.com/php-5-4-3-and-php-5-3-13-x64-64-bit-for-windows/ and download the...
In a javascript array, how do I get the last 5 elements, excluding the first element?
...
362
You can call:
arr.slice(Math.max(arr.length - 5, 1))
If you don't want to exclude the first...
What's the difference between a proc and a lambda in Ruby?
....
An example:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lambda {|a, b| puts a**2+b**2 } # => #<Proc:0x15016c@(irb):5 (lambda)>
l.ca...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...012), I have noticed that resolving to a virtual host is very slow (around 3 seconds) the first time but after that is fast as long as I continue loading it regularly.
...
how to get the current working directory's absolute path from irb
... |
edited May 18 '13 at 6:34
answered Dec 21 '09 at 1:31
...
Fastest way to determine if an integer's square root is an integer
...
35 Answers
35
Active
...