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What is the difference between `after_create` and `after_save` and when to use which?
... after after destroying the record? Or in the ops case, send an email to a now deleted user? Be careful with using after_commit
– rmcsharry
Jul 1 '19 at 15:33
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Python 3.x rounding behavior
...ard the higher number. With large numbers of calculations, this can be significant. The Python 3.0 approach eliminates this issue.
There is more than one method of rounding in common use. IEEE 754, the international standard for floating-point math, defines five different rounding methods (the one u...
What's the difference between TRUNCATE and DELETE in SQL
...ledBack in SQL SERVER. And in the 2nd row DELETE dose not reset identity. Now how can you edit this post? That's the bad thing about using pictures in StackOverflow.
– Mahmood Jenami
Aug 3 '16 at 8:05
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How to create a self-signed certificate for a domain name for development?
...xactly. This is wrong! "Friendly name" has nothing to do with CN. I don't know why this answer has so many upvotes?
– c00000fd
Sep 23 '15 at 20:41
25
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Difference between this and self in self-type annotations?
...aking a certain type and returning the code block e.g. foo: B => {...}. Now those curlies are of course omitted. It is interesting to see that you can use the object name instead of "this" inside any scope in the code though [something we do all the time in javascript]
– Ust...
AtomicInteger lazySet vs. set
What is the difference between the lazySet and set methods of AtomicInteger ? The documentation doesn't have much to say about lazySet :
...
How can I change image tintColor in iOS and WatchKit
...
Perfect, now i use this method based in your code: + (UIImageView ) tintImageView: (UIImageView *)imageView withColor: (UIColor) color{ imageView.image = [imageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]...
Best way to check if a Data Table has a null value in it
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You can (now) use table.AsEnumerable() instead of table.Rows.OfType<DataRow>()
– Teejay
Dec 14 '16 at 16:08
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Convert NSNumber to int in Objective-C
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Implicit conversion is now disallowed with ARC.
– Alexander
Nov 21 '17 at 12:52
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Windows下 C++网络延时检测 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是如何实现的呢？直接上代码吧，亲测可用：
Ping.h
#ifndef CPING_H
#define CPING_H
#include <windows.h>
#include <conio.h>
#include <winnt.h>
#define PING_TIMES 2 //ping 4 次
typedef struct _IPINFO
{
unsigned char Ttl; // Time To Live
unsigned char Tos; /...