大约有 40,000 项符合查询结果（耗时：0.0542秒） [XML]
Is there a math nCr function in python? [duplicate]
... @Renato: what are you talking about? This answer isn't dangerous at all. Do you think that math.factorial returns a float, and not an arbitrary-precision integer, maybe?
– DSM
Mar 25 '13 at 19:03
...
Truncating floats in Python
...o the binary value stored in the computer's memory, not the string you actually typed into the source code.1
If you decode the sequence of bits back into a decimal number, again using the IEEE 64-bit floating-point format, you get
0.2999999999999999888977697537484345957637...
so a naive implemen...
How to get full path of a file?
...
The following usually does the trick:
echo "$(cd "$(dirname "$1")" && pwd -P)/$(basename "$1")"
share
|
improve this answer
|
follow
|
...
Rails hidden field undefined method 'merge' error
... set the value for that attribute on the object that backs the form. For example:
controller:
def new
...
@order.service = "test"
...
end</pre>
view:
<%= form_for @order do |f| %>
<%= f.hidden_field :service %>
<%= f.submit %>
<% end %>
...
What is the difference between a strongly typed language and a statically typed language?
...but it will never refer to an Integer or a List. That's static typing.
In PHP:
$s = "abcd"; // $s is a string
$s = 123; // $s is now an integer
$s = array(1, 2, 3); // $s is now an array
$s = new DOMDocument; // $s is an instance of the DOMDocument class
That's dynamic typi...
Import file size limit in PHPMyAdmin
I have changed all the php.ini parameters I know:
upload_max_filesize , post_max_size .
27 Answers
...
Memoization in Haskell?
...tion (fix)
Let's define f, but make it use 'open recursion' rather than call itself directly.
f :: (Int -> Int) -> Int -> Int
f mf 0 = 0
f mf n = max n $ mf (n `div` 2) +
mf (n `div` 3) +
mf (n `div` 4)
You can get an unmemoized f by using fix f
This...
Can virtual functions have default parameters?
...ference the defaults denoted in the derived class are used. There is an example below the Standard quotation that demonstrates this.
Some compilers may do something different, but this is what the C++03 and C++11 Standards say:
8.3.6.10:
A virtual function call (10.3) uses
the default a...
Why are there two kinds of functions in Elixir?
...bove as an anonymous function. You mentioned it yourself:
other_function(&hello(&1))
And then you asked, why I cannot simply pass it as hello as in other languages? That's because functions in Elixir are identified by name and arity. So a function that expects two arguments is a different...
Get class that defined method
...ited Jun 20 '14 at 19:44
Aaron Hall♦
260k6969 gold badges353353 silver badges303303 bronze badges
answered Jun 7 '09 at 2:23
...