SEARCH KEYWORD -- REASON
Can a === 1 && a === 2 && a === 3 be true in JavaScript?
Lots of you may be aware that there is famous interview question which asks whether a == 1 && a == 2 && a == 3 can be true in JavaScript. And the answer to this question is YES. The reason is that == will do a non-strict comparison which will evaluate a to a number and this provides the possibility of dynamically return the value when every time a is accessed. Have you ever wondered whether a === 1 && a === 2 && a === 3 can be true? At first glance, it seems this ...
JAVASCRIPT,===,STRICT COMPARISON 2018-04-06 12:17:29
What's on your Learning List?
How do you track and decide what topics you want to spend time learning? For a while, I didn’t have a real good solution. Something would trigger me to remember “Oh yeah! I really wanted to learn more about thatâ€. I would spend the evening doing busy learning - it seemed like I was learning but I really wasn’t. Instead of trying to do Deliberate Practice, I’d fool myself into thinking I was investing my time wisely by reading blog posts and examples but no...
Learning list,Conscious,Study,Programming 2011-12-05 12:44:39
Can two new objects point to the same memory address in GoLang?
Do you have any idea what the output will be for below GoLang snippet? package main import ( "fmt" ) type obj struct{} func main() { a := &obj{} fmt.Printf("%p\n", a) c := &obj{} fmt.Printf("%p\n", c) fmt.Println(a == c) } Many people would think that a and c are two different object instances which have different memory addresses. Hence a == c will be false. But if you try to run the above program, you would see below output 0x5781c8 0x5781c8 true To get to know the reason wh...
GO,GOLANG,VARIABLE ESCAPE,ZEROBASE 2019-04-06 01:19:52
I don’t like the Ruby 1.9 hash syntax
There, I said it, I don’t like it. And I don’t know why you do either. I assume you like it anyway, everyone else I talk to seems to. My heart sank over and over again whilst I was at the recent RailsConf and saw respected rubyist after respected rubyist using the new Ruby 1.9 hash syntax in their presentations. I just don’t get it. But I’m not one to just moan. I plan to justify my feelings. Then maybe you can tell me why you do like it? My friend the hash rocket I ...
Different types of keystore in Java -- PKCS11
PKCS11 keystore is designed for hardware storage modules(HSM). It's an interface to talk to the HSMs. It doesn't actually store any keys but provide a set of classes to communicate with the underlying HSM. The actual keys and certificates are stored on the HSMs. The reason for storing the keys and materials is to ensure security and efficiency. Since the keys are on the HSMs, they are safe to be stolen. All encryption/decryption operations are performed on the HSMs as well, this incre...
How does Base64 work
Base64 is a data encoding scheme used in safe data transfer such as HTTP and its extensions. Base64 encoding can conver arbitrary group of bytes into a sequence of readable ASCII characters. These converted characters can safely put in a HTTP header without causing any problem while the peers process the HTTP header. Base64 encoding was invented as part of the MIME content transfer encoding. It is similar to other encoding schemes such as Uuencode and BinHex but with higher efficiency....
Why are ugly websites so successful?
“Techmeme has redesigned,†Gabe Rivera founder of the popular technology news site wrote in January 2012. “Drudge Report is now indisputably the web’s ugliest news site.†I use Techmeme all the time. I find it an excellent news website. It’s a collection of well-selected links to important issues in the technology industry. It doesn’t look pretty but it works fine for me. Asides from the quality of its stories it also has black text on white bac...
Website design,Ugly,Success,Analysis 2012-02-13 05:27:56
Error handling in GoLang
Error handling is one of the must talked topics for any programming language. The program would be more reliable and stable if errors are handled properly and timely. Each programming language has its own way to handle error, this applies to GoLang as well. This post will discuss more about GoLang's error handling mechanism. Error handling Before talking more about GoLang's error handling, we can see how different programming languages are handling errors. C's error check The most direct way of ...
GOLANG,ERROR HANDLING,FLUENT INTERFACE 2021-03-06 21:36:08
What you may not know about PHP session
When we access one website, the site usually should have a mechanism to keep track of the status of the user on the site. There are a few mechanisms supported by many server side languages to help track user status such as session and cookie. Today we will talk about session, when creating a session, we need to keep track of many data, besides user data, we also need to tell the server what is the timeout of the session so that we can garbage collect the session data which should not be stored a...
PHP session,session timeout,example 2013-07-06 08:44:18
Binary tree iterator algorithm
Binary tree pre-order,in-order and post-order traversal are basics in algorithm and data structure.And the recursive binary tree traversal is a classical application of recursion. We define a binary tree node as : // C++ struct Node { int value; Node *left; Node *right; } In order binary tree traversal can be: // C++ void inorder_traverse(Node *node) { if (NULL != node->left) { inorder_traverse(node->left); } do_something(node); if (NULL != node->righ...
Binary tree,Iterator,Traversal 2013-07-14 21:51:09
RECENT
- Introduction to the Application of eBPF in Golang
- Flows.network: Writing an LLM Application in Rust
- Python FTP Server and Client
- When is there no need 3 handshakes in TCP?
- Why TCP needs 3 handshakes
- Your Ultimate Guide to Restoring Database Backups in SQL Server 2012
- OT Power Grid System Development
- Fix Surface Keyboard not Working Issue
- Python Process Protection Watchdog
- The Strange Behavior of the void Type in TypeScript
- more>>