大约有 47,000 项符合查询结果(耗时:0.0469秒) [XML]

https://stackoverflow.com/ques... 

What are the differences between virtual memory and physical memory?

..., while maintaining a respectable performance for the softwares running. Now the main question boils down to how the memory is being managed. What exactly governs where in the memory will the data belonging to a given software reside? Possible solution 1: Let individual softwares specify expl...
https://stackoverflow.com/ques... 

Create a unique number with javascript time

... if you need the readable version, you're in for a bit of processing: var now = new Date(); timestamp = now.getFullYear().toString(); // 2011 timestamp += (now.getMonth < 9 ? '0' : '') + now.getMonth().toString(); // JS months are 0-based, so +1 and pad with 0's timestamp += ((now.getDate < ...
https://stackoverflow.com/ques... 

How might I find the largest number contained in a JavaScript array?

... Ah, but now it has the SO Sticker of Quality affixed to it in an only slightly-crooked fashion! – Shog9 Sep 4 '09 at 14:26 ...
https://stackoverflow.com/ques... 

How to subtract 30 days from the current datetime in mysql?

... SELECT * FROM table WHERE exec_datetime BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW(); http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-add share | ...
https://stackoverflow.com/ques... 

Why use double indirection? or Why use pointers to pointers?

...t of bio-libraries (a ??lol), you can use char ******lol ... ... yes, I know these might not be the best data structures Usage example with a very very very boring lol #include <stdio.h> #include <stdlib.h> #include <string.h> int wordsinsentence(char **x) { int w = 0; ...
https://stackoverflow.com/ques... 

How to get record created today by rails activerecord?

... Post.where(created_at: Time.zone.now.beginning_of_day..Time.zone.now.end_of_day) PS: This answer has been modified as answer by Harish Shetty was better than mine. As my answer is accepted one. I have updated this answer for community support ...
https://stackoverflow.com/ques... 

Set NOW() as Default Value for datetime datatype?

...ialization.html http://optimize-this.blogspot.com/2012/04/datetime-default-now-finally-available.html Prior to 5.6.5, you need to use the TIMESTAMP data type, which automatically updates whenever the record is modified. Unfortunately, however, only one auto-updated TIMESTAMP field can exist per tab...
https://stackoverflow.com/ques... 

Moment js date time comparison

... read most of their docs, but didn't find the function to achieve this. I know it will be there. 8 Answers ...
https://stackoverflow.com/ques... 

Difference between 2 dates in SQLite

... SELECT julianday('now') - julianday(DateCreated) FROM Payment; share | improve this answer | follow |...
https://stackoverflow.com/ques... 

How to get current time and date in C++?

... In C++ 11 you can use std::chrono::system_clock::now() Example (copied from en.cppreference.com): #include <iostream> #include <chrono> #include <ctime> int main() { auto start = std::chrono::system_clock::now(); // Some computation here ...