大约有 15,000 项符合查询结果（耗时：0.0269秒） [XML]
How do I use floating-point division in bash?
...2;$IMG_WIDTH/$IMG2_WIDTH") without $(( )) (double parentheses) ; which is expanded by the bash before executing command
– Nahuel Fouilleul
Oct 4 '12 at 7:32
...
Getting the index of the returned max or min item using max()/min() on a list
I'm using Python's max and min functions on lists for a minimax algorithm, and I need the index of the value returned by max() or min() . In other words, I need to know which move produced the max (at a first player's turn) or min (second player) value.
...
Installing vim with ruby support (+ruby)
...
Some package provides vim-ruby on Ubuntu, for example vim-nox.
simply:
sudo apt-get install vim-nox;
will get you vim with ruby, as well as compiled in "support for scripting with Perl, Python, Ruby, and TCL but no GUI."
sudo apt-get install vim-rails
will install ...
Inserting a Python datetime.datetime object into MySQL
...tetime.datetime() object into this column. What should I be using in the execute statement?
7 Answers
...
Check if a variable is of function type
... answered Sep 9 '11 at 2:24
Alex GrandeAlex Grande
6,85311 gold badge2323 silver badges2727 bronze badges
...
How do I pass a variable by reference?
...n't even mutate the object.
To make it even more clear, let's have some examples.
List - a mutable type
Let's try to modify the list that was passed to a method:
def try_to_change_list_contents(the_list):
print('got', the_list)
the_list.append('four')
print('changed to', the_list)
...
What is the function of the push / pop instructions used on registers in x86 assembly?
... on top of the stack into a register. Those are basic instructions:
push 0xdeadbeef ; push a value to the stack
pop eax ; eax is now 0xdeadbeef
; swap contents of registers
push eax
mov eax, ebx
pop ebx
...
How to remove trailing whitespace of all files recursively?
...
Here is an OS X >= 10.6 Snow Leopard solution.
It Ignores .git and .svn folders and their contents. Also it won't leave a backup file.
export LC_CTYPE=C
export LANG=C
find . -not \( -name .svn -prune -o -name .git -prune \) -type f -p...
Why cast unused return values to void?
...
David's answer pretty much covers the motivation for this, to explicitly show other "developers" that you know this function returns but you're explicitly ignoring it.
This is a way to ensure that where necessary error codes are always handled.
I think for C++ this is probably the only...
Named string formatting in C#
...{foo} is {bar} and {yadi} is {yada}".Inject(o);
Here's another
Status.Text = "{UserName} last logged in at {LastLoginDate}".FormatWith(user);
A third improved method partially based on the two above, from Phil Haack
sha...