大约有 43,100 项符合查询结果（耗时：0.0400秒） [XML]
Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities
What are some algorithms which we use daily that has O(1), O(n log n) and O(log n) complexities?
11 Answers
...
How to merge dictionaries of dictionaries?
...
147
this is actually quite tricky - particularly if you want a useful error message when things ar...
in javascript, how can i get the last character in a string [duplicate]
...
183
Since in Javascript a string is a char array, you can access the last character by the length ...
Passing parameters in rails redirect_to
...
174
Just append them to the options:
redirect_to controller: 'thing', action: 'edit', id: 3, some...
I want to remove double quotes from a String
...
15 Answers
15
Active
...
Converting file size in bytes to human-readable string
...
19 Answers
19
Active
...
Closing multiple issues in Github with a commit message
I know you can close issues by putting closes #1 or fixes #1 in the commit message. What is the best way to close multiple issues in the same commit message?
...
How do I check the difference, in seconds, between two dates?
...es, use total_seconds like this:
import datetime as dt
a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(b-a).seconds
0
...
Is a Java hashmap search really O(1)?
I've seen some interesting claims on SO re Java hashmaps and their O(1) lookup time. Can someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions.
...