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Difference between allocation and unpacking of arrays

So I have this JavaScript code, what is the difference between LineA and LineB constarr1=[1,2,3,4,5]constarr2=[...arr1];//LineAconstarr2=arr1;//LineB so I want Know whether these two assignment methods are the same or have some differences

P粉287254588 2023-08-13 16:31:45

What are the meanings and detailed differences of MySQL installation options?

1.What are the differences/differences between MySQL database installation options? 2. What are the differences/differences between the options of Config Type? 3. What do the various log file types mean? What's the difference?

天际梦想 2019-02-17 16:17:11

What is the difference between enctype and formenctype in HTML5?

I'm just wondering what's the difference between the attributes enctype and formenctype in HTMLLivingStandard (aka the new HTML5 spec)? I've been reading the HTML Standard for Developers but still can't seem to see any real difference between the two.

P粉190883225 2024-04-02 11:47:56

What is the difference between @EnableAutoConfiguration and @ComponengScan in Spring Boot?

In the current new version of spring boot, @SpringBootApplication is equivalent to @Configuration, @ComponentScan, and @EnableConfiguration. What is the difference between @EnableAutoConfiguration and @ComponengScan? Since @EnableAutoConfiguration...

世界只因有你 2017-05-17 10:00:53

Ever understand the difference between gender and your sexual orientation?

In Inferno, when trying to define the child element shape at compile time, there are two ways of defining the child element as text: functionHello(){leth="Hello";return({h});}import{createTextVNode}from" inferno";functionHello(){leth="Hello";return({createTextVNo

P粉562845941 2023-08-15 15:53:07

Comparing floating point calculations in Node.js: Differences between Intl.NumberFormat and decimal.js libraries

I want to understand the difference between Intl.NumberFormat and decimal.js libraries. If Intl.NumberFormat can handle monetary calculations, what does the decimal.js library do and what are its advantages over it? This question is specifically for Node.js (probably version 14+).

P粉663883862 2023-09-01 22:44:01

What is the difference between CSRF tokens and API tokens in Laravel?

What is the difference between using CSRF tokens and API tokens? Are there any better options? How about performance and security? I want to integrate in Laravel 10 and Nuxt.js 3. I've seen in some videos that people only use CSRF tokens and I want to know the real difference.

P粉921165181 2023-07-27 19:45:36

What is the difference between next/router and next/navigation?

In Next.js, I know that both next/router and next/navigation have a useRouter() hook, but the objects returned are different. Why does Next.js have the same hook on both routing packages?

P粉946336138 2023-10-30 16:44:55

Understand the difference between client-side and server-side programming

I have this code: <scripttype="text/javascript">varfoo='bar';<?phpfile_put_contents('foo.txt','+foo+');?>varbaz=<?phpecho42;?>;alert(baz );</script>Why doesn't this write "bar" to my text file, but instead warns "42"?

P粉885562567 2023-10-19 12:36:20

ios - What is the difference between $(PROJECT_DIR) and $(SRCROOT) in actual development of Xcode.

During development, I saw two different ways of writing $(PROJECT_DIR) and $(SRCROOT) in the application. What is the difference between the two?

迷茫 2017-05-16 13:19:33

In JavaScript, the difference between querySelector and querySelectorAll and getElementsByClassName and getElementById

I want to know what exactly is the difference between querySelector and querySelectorAll and getElementsByClassName and getElementById? From this link, I learned that using querySelector, I can write document.querySelector(".myclass") to get the element with class name myclass, and documen...

P粉442576165 2023-08-21 21:45:39

What are the differences between apache's aliases, redirecting, and rewriting?

There are aliases, redirecting and rewriting functions in apache, but I don’t understand the connection and difference between them. Under what circumstances are they more appropriate to use?

黄舟 2017-05-16 17:04:34

javascript - What is the difference between computed and watch in vue?

For example, in the official vue.js documentation, I saw an example of getting the full name of computed and watch: {code...} {code...} The rookie said that he didn’t understand the difference between them. Couldn’t watch be like How to get computed?

高洛峰 2017-05-19 10:24:39

The difference between CSS attribute selectors and pseudo-elements for input tags

**Inside the CSS file: **input[type="text"]{border:2pxsolidred;}input::placeholder{color:green;}input[title="google"]{background-color:black;color:white ;} Why are the writing procedures different for types, placeholders and titles? Despite the mark

P粉988025835 2023-09-10 15:43:12

What is the difference between HTML tags and elements?

I've noticed that most people use the words "HTML tag" and "HTML element" interchangeably. But what's the difference between them? I think the tag is in the source code and the element is the tag in the DOM that is processed (by the browser). am I wrong?

P粉447002127 2024-02-21 10:30:53

Can I run Nuxt 3 without using <script setup>?

Is it possible to migrate a Nuxt2 application to Nuxt3 and keep the JavaScript that I execute in the pages between pure tags instead of updating them as tags? If not, what changes should I make to my code? Basically: what's the main difference between these two?

P粉541796322 2023-09-09 16:35:19

javascript - What is the difference between js's toString method and toLocaleString()

In the js document, toString() is used to convert to a string. toLocaleString() is used to convert to a local string. Through code testing, I used it to convert to a string. What is the connection and difference between the two? ? I can't see any difference through the following two pieces of code:

phpcn_u1582 2017-06-30 09:54:05

php - What are bytecode and opcode? What's the difference?

Q1 What are bytecode and opcode? Q2 What is the difference? Q3 Do all interpreted languages have similar codes? My understanding is: bytecode and opcode are both intermediate codes. Interpreted languages will translate the source code into intermediate codes, and then the virtual machine (such a...

怪我咯 2017-06-05 11:07:43

What is the difference between using a file in a class and using a file outside a class in Laravel?

What is the difference between using a file in a class and using a file outside a class in Laravel? For example, we often see a bunch of uses after the namespace. These uses are outside the class, and some uses are inside the class. What is the difference between the two? Example: HttpControllersAut...

ringa_lee 2017-05-16 16:47:46

Laravel Eloquent associated function name

I have two tables, "posts" and "categories". The relationship between "posts" and "categories" is many-to-one. So the code in the "Post" class model looks like this:

P粉729198207 2023-07-23 17:45:15