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Rails find record with zero has_many records associated [duplicate]
...hat particular city's id as the foreign key.
– sixty4bit
Jul 2 '15 at 1:33
7
@sixty4bit - It work...
About Java cloneable
... sort of problem, I'll have to defer to Bloch. Item #11. It's long and a bit of hard read, but it basically says "avoid cloneable whenever you can, copy constructors are your friend".
– Bane
Feb 27 '14 at 22:39
...
What's the difference between Git Revert, Checkout and Reset?
...mmit + unstage changes
– NattyC
Jul 10 '19 at 7:08
add a comment
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How do I iterate over the words of a string?
... trivial and portable. Boost has its place but I would suggest that its a bit of overkill for tokenising strings: you wouldnt have your whole house transported to an engineering firm to get a new nail hammered into the wall to hang a picture.... they may do it extremely well, but the prosare by far...
How to create a static library with g++?
...te an executable called test?
– Lightness Races in Orbit
May 10 '11 at 8:28
5
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Is there any kind of hash code function in JavaScript?
...lt;<5)-hash)+character;
hash = hash & hash; // Convert to 32bit integer
}
return hash;
}
That is the way of implementation in Java (bitwise operator).
Please note that hashCode could be positive and negative, and that's normal, see HashCode giving negative values. So, you c...
C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...从缓冲区中取出消息
MessageBuffer.h
//MessageBuffer.h
#ifndef _MESSAGE_BUF_INCLUDE_
#define _MESSAGE_BUF_INCLUDE_
#include <pthread.h>
#define MESSAGE_COUNT 16
#define MESSAGE_LENGTH 2048
class MessageBuffer{
private:
pthread_mutex_t mutex;//访问缓冲的互斥量
pthread_...
How to avoid 'cannot read property of undefined' errors?
... strstr
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What's the meaning of 'origin' in 'git push origin master'
...from" - the latter is a holdover phrase from centralized VCS, and can be a bit misleading to DVCS beginners.
– Cascabel
Mar 11 '11 at 16:17
1
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How would I run an async Task method synchronously?
...
10
The question concerns a Task that is returned by async method. Such kind of Task may have already been started, executed, or canceled, so u...