大约有 32,000 项符合查询结果（耗时：0.0432秒） [XML]
Why is it string.join(list) instead of list.join(string)?
...implementation would be difficult, if implemented using the __add__ method then it's O(n²).
The separator string (sep) should not be omitted. Explicit is better than implicit.
There are no other reasons offered in this thread.
Here are some additional thoughts (my own, and my friend's):
Unicod...
Create a dictionary on a list with grouping
...imension that you want to search by. The trick is to create a grouping and then convert it to a dictionary, as follows:
Dim qry = (From acs In ActualSales _
Group By acs.ProductID Into Group _
Select ProductID, Months = Group.ToDictionary(Function(c) c.Period) _
...
Difference between numeric, float and decimal in SQL Server
...sion provided by decimal is insufficient - I thought real is LESS accurate then decimal ,so how come u write to use real if decimal is insufficient?
– BornToCode
Aug 20 '12 at 12:37
...
class name and method name dropdown list is missing (visual studio setting)
... VS on the monitor on the left side, and this is not your primary monitor, then the dropdowns will not work.
share
|
improve this answer
|
follow
|
...
How to define hash tables in Bash?
...g")
Or merge them:
declare -A animals=( ["moo"]="cow" ["woof"]="dog")
Then use them just like normal arrays. Use
animals['key']='value' to set value
"${animals[@]}" to expand the values
"${!animals[@]}" (notice the !) to expand the keys
Don't forget to quote them:
echo "${animals[moo]}"
...
Cached, PHP generated Thumbnails load slowly
...ail should be generated and returned no matter what. If they are both true then the following check should be made:
Is there a HTTP_IF_MODIFIED_SINCE header
Is the cached version's last modified time the same as the HTTP_IF_MODIFIED_SINCE
If either of these are false the cached thumbnail should ...
Are PHP Variables passed by value or by reference?
...as $str = add_some_extra($str); if I was not using the reference , right ? then what is the real added value of that ?
– Obmerk Kronen
Nov 24 '13 at 6:06
...
Difference between repository and service?
...
Would it be okay to do the following then: My repository has all my complex database calls, then in my service i inject the repository as a dependency. Now I have easily testable code and separated my concerns, because my service does not know how the DB calls a...
What's the difference between 'git merge' and 'git rebase'?
...
Suppose originally there were 3 commits, A,B,C:
Then developer Dan created commit D, and developer Ed created commit E:
Obviously, this conflict should be resolved somehow. For this, there are 2 ways:
MERGE:
Both commits D and E are still here, but we create merge c...
How to do parallel programming in Python?
...e, you'd need to define your functions with the @ray.remote decorator, and then invoke them with .remote.
import ray
ray.init()
# Define the functions.
@ray.remote
def solve1(a):
return 1
@ray.remote
def solve2(b):
return 2
# Start two tasks in the background.
x_id = solve1.remote(0)
y...