大约有 41,400 项符合查询结果（耗时：0.0374秒） [XML]
Python set to list
...
Your code does work (tested with cpython 2.4, 2.5, 2.6, 2.7, 3.1 and 3.2):
>>> a = set(["Blah", "Hello"])
>>> a = list(a) # You probably wrote a = list(a()) here or list = set() above
>>> a
['Blah', 'Hello']
Check that you didn't overwrite list by accident...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...
1003
I would recommend using INSERT...ON DUPLICATE KEY UPDATE.
If you use INSERT IGNORE, then the ro...
Pythonic way to create a long multi-line string
...
2313
Are you talking about multi-line strings? Easy, use triple quotes to start and end them.
s = ...
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...
Is it possible to implement a Python for range loop without an iterator variable?
...
113
Off the top of my head, no.
I think the best you could do is something like this:
def loop(f,n...
Resize image proportionally with MaxHeight and MaxWidth constraints
...
3 Answers
3
Active
...
How would you go about parsing Markdown? [closed]
...tten in OCaml, it is extremely simple and short (268 SLOC for the parser, 43 SLOC for the HTML emitter), yet blazingly fast (20% faster than discount (written in hand-optimized C) and sixhundred times faster than BlueCloth (Ruby)), despite the fact that it isn't even optimized for performance yet. B...
Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...
173
There's no big advantage for those cases where an assertFoo exists that exactly matches your int...
Select every Nth element in CSS
...;/h1>
<div>1</div> <div>2</div>
<div>3</div> <div>4</div>
<h2></h2>
<div>5</div> <div>6</div>
<div>7</div> <div>8</div>
<h2></h2>
<div>9</div> <...
Does Ruby regular expression have a not match operator like “!~” in Perl?
...
3 Answers
3
Active
...