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nginx - Which open source server monitoring software is better for e-commerce platforms? Please recommend

Which open source server monitoring software is better for e-commerce platforms? Please recommend it to experts, thank you very much for the functional requirements: 1. Ability to collect client IPs connected to the server, preferably with an interface to directly extract data 2. Graphical summary a...

高洛峰 2017-05-16 17:10:39

Adds a new object to a specific existing array name and saves it using the index value

I know the best way is probably to save the new object at the end of the existing array without a name, but I want to make it a little more complex to learn how to do this and have it at the index value [0] of the array instead of the end [arr .length-1] and I need to save it in a specific array nam...

P粉006847750 2024-04-03 19:43:33

angular.js - Binding problem of input control of form in AngularJS

I learned from the official documentation that when a name is specified for a form, the form will be added to the scope, and the form object will be obtained using the name of the form; at the same time, the control object can also be obtained from the form object based on the name of the control. F...

曾经蜡笔没有小新 2017-05-15 16:53:30

What is the access syntax for PHP object properties?

How to access properties of a PHP object? Also, what is the difference between using $this->$property1 and $this->property1 to access object properties? When I try to use $this->$property1 I get the following error: 'PHP: Cannot access null property'. There is a comment in PHP's...

P粉966335669 2023-08-22 19:45:26

javascript - How does js call a method defined in an object through a variable and pass parameters?

I have defined several methods now and receive a parameter. When accessing a method in this object, how can I access it through a variable? Defining method: {code...} Calling method: {code...} It is known that the properties and methods of the access object can be accessed through "." or &...

typecho 2017-06-12 09:32:18

Is JavaScript a pass-by-reference or pass-by-value language?

Primitive types (numbers, strings, etc.) are passed by value, but objects are unknown, since they can all be passed by value (in which case we think the variable holding the object is actually a reference) and pass-by-reference (when we think of an object's variables as holding the object itself). A...

P粉450744515 2023-08-23 18:58:12

Is JavaScript a language that uses pass-by-reference or pass-by-value?

Primitive types (numbers, strings, etc.) are passed by value, but objects are unknown since they can all be passed by value (in this case, the variable we think holds the object is actually a reference to the object) and pass-by-reference (when we think of an object's variables as holding the object...

P粉002546490 2023-10-11 17:50:30

Using AWS SDK for PHP 3.x: Get the latest objects in an S3 bucket by last modification time.

I'm trying to get the latest object in a bucket by last modified time using AWS SDK for PHP 3.x. I've seen how to use the AWS CLI to achieve this functionality. Here it is: Using AWS CLI to get the last modified objects in an S3 bucket by last modification time. But I don't know how to use PHP SDK t...

P粉262113569 2023-07-28 11:50:32

Free express delivery tracking number logistics inquiry common API interface integration (Express Bird example)

With the advancement of technology and the development of the Internet industry, online shopping has become a mainstream consumption method. E-commerce platforms and ISV merchants have a lot of demand for logistics API interfaces. The express delivery number query API interface is suitable for docki...

昨日青空 2019-09-02 16:26:51

Are parameters passed in JavaScript by value or by reference?

Primitive types (numbers, strings, etc.) are passed by value, but objects are unknown since they can either be passed by value (in which case we think the variable holding the object is actually a reference to the object), It is also possible to pass by reference (in which case we consider the varia...

P粉394812277 2023-08-21 15:57:16

javascript - Declaring an array to add a value produces a value of type undefined

JS: Use objects to get successful values, use arrays, and there will be values of type undefined {code...} The above can get the correct results. {Code...} The above code uses an array, and there will be a value with the default type undefined. Although I solved this problem by replacing the objec...

给我你的怀抱 2017-07-05 10:58:20

mongodb - mongo的sort排序问题

最近用了mongo，发现个问题，某个集合里，文档对象里有个ctime字段，是MongoDate类型的，我做这样的查询db.find().sort({'ctime':-1}).limit(10)，发现是全表扫描了一遍，要想快除非建个{'ctime':-1}的索引但是...

过去多啦不再A梦 2017-04-28 09:06:02

java - ArrayList memory allocation, cross-generation reference gc issue

What is the memory allocation of ArrayList in JVM? {Code...} Continuously add BigObject, is its reference relationship as follows? Then ygc occurs. Did BigObject enter the old area? If the arrayList object does not enter the old area, wouldn't there be a cross-generation reference? If you enter,...

黄舟 2017-05-17 10:07:27

blog - gitcafe上的博客怎么实现被google等搜索引擎收录

大家好。我在gitcafe上用jekyll做了个个人blog(假设域名是myproject.gitcafe.com)，但是发现这个blog的内容没有被google，百度等搜索引擎收录，我要怎么做才能让我的blog被搜索引擎收录呢？我是做生物的，会写点...

PHP中文网 2017-04-28 09:04:10

Regarding the underlying processing issues of preventing injection of mysql prepared statements

PHP's PDO object or STMT object executes the SQL statement containing the injection. Looking at the MYSQL log, it is found that only the second single quote is escaped. SELECT * FROM admin WHERE user = '123\' or 1 = 1#' while using C and other languages. The log of calling the native API of libmysql...

phpcn_u5077 2017-06-15 18:24:58

How to access properties inside PHP?

Follow up on the basis of this document: https://www.php.net/manual/en/language.oop5.references.php A key point of PHP object-oriented programming that is often mentioned is that "objects pass by reference by default transfer". This is not entirely correct. In PHP, object variables do not ...

P粉518799557 2023-09-05 18:50:40

javascript - table td cell generates tr problem

Assume that there are 10 json objects of td, and the colspan attribute value of td is 1-3. Now we need to turn them into td and put them in tr. When the colspan of td is 1, put 3 td in tr, and when the colspan is 2, , put two tds in tr. When colspan is 3, put 3 tds in tr. How to do it?

漂亮男人 2017-05-16 13:44:37

php - Ask me about mysql transactions, locks and transactions?

For example, if the account balance is 100 yuan, and if the balance is greater than the transaction amount during the transaction, the transaction will be successful. Now assuming that this user has multiple transactions at the same time, problems will occur during detection. Question: I would like ...

代言 2017-06-24 09:41:23

c++ - Find consecutive occurrences of words from input and count

The question is to read several string objects from the standard input and find words that appear continuously. For example, if the input is: how now now now heaven cow, it should output 3 (now appears 3 times in a row) {code...} However, The problem now is that the output is always 0, and I find it...

给我你的怀抱 2017-05-16 13:23:50

Add items to cart using Vue?

I'm trying to figure out how to implement shopping cart functionality on a page using Vue.js. I get a list of items from an API call and print them when the page loads. But I'm having trouble trying to add items to my cart. The functionality should include the ability to select the quantity of items...

P粉464088437 2024-03-26 12:34:33