Found a total of 10000 related content
Complete usage of mysql date function
Article Introduction：MySQL date function: Play with time and control data. Many friends are often dizzy when processing MySQL databases. In fact, mastering MySQL's powerful date functions can simplify the complex and easily control time data. In this article, let’s explore these functions in depth so that you will no longer be tortured by date format and time calculation. After reading, you can not only be proficient in using various date functions, but also understand the principles behind them and write more efficient and elegant SQL statements. Basic preparation: Time type and format Before starting, we need to clarify the data types that store dates and times in MySQL, such as DATE, TIME, DATETIME, TIMESTAMP, etc. They each have their own characteristics
2025-04-08
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322
php get yesterday's date
Article Introduction：There are three ways to get yesterday's date in PHP: use the strtotime() function, combine the date() function to output detailed time, or use the DateTime class for flexible processing. The first method directly obtains yesterday's date through echodate('Y-m-d',strtotime('yesterday')); the second method can output the full time containing time, minutes and seconds, such as echodate('Y-m-dH:i:s',strtotime('yesterday')); the third method uses the object-oriented DateTime class to facilitate the execution of complex date operations, such as adding and subtracting days or setting time zones, with the code as $date=n
2025-07-04
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150
php add days to date
Article Introduction：It is recommended to use the DateTime class to add a number of days to dates in PHP, with clear code and flexible functions. The DateTime class introduced in PHP5.2 supports object-oriented operations. The example code is: $date=newDateTime('2024-10-01'); $date->modify('5days'); echo$date->format('Y-m-d'); The output result is 2024-10-06; this method is highly readable and supports time zone setting and formatting output. You can also use strtotime() to implement it, but you need to pay attention to the time zone problem. The example is: $newDate=date("
2025-07-05
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774
Use jQuery to Generate Quick Pagination
Article Introduction：From time to time, SitePoint removes years-old demos hosted on separate HTML pages. We do this to reduce the risk of outdated code with exposed vulnerabilities posing a risk to our users. Thank you for your understanding.
Use Quick jQuery Paginatio
2025-03-06
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1028
jQuery Read-Only Input Field
Article Introduction：Easily control read-only properties of input fields with jQuery
This article describes how to use simple jQuery code snippets to control the read-only properties of the input field so that it is not editable or restored to the editable state.
Set read-only properties:
The following code uses jQuery's attr() method to set the input field to read-only:
$('input').attr('readonly', true);
Cancel the read-only attribute:
Use the removeAttr() method to cancel the read-only attribute of the input field:
$('input').removeAttr('readonly');
Remember to put the jQuery code in $(document).re
2025-03-10
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837
Finding a Date Picker Input Solution for Bootstrap
Article Introduction：Best practices for cross-browser date input
This article explores the challenges and best solutions for implementing date input fields in various browsers. Due to inconsistent browser support and neglect of lang attributes, we need a robust solution to deal with date formats, UTC/local time issues, and differences between different browsers.
Key points:
The browser's support for and lang attributes is uneven, resulting in the inability to display input widgets in non-native languages.
Many JavaScript solutions attempt to improve support for date input, but few scripts can handle two different date formats that display and save data at the same time.
Datepicker for jQuery UI is a well-tested and supported
2025-02-20
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1111
jQuery Get Timestamp getTime() Example
Article Introduction：Simple jQuery code snippet to get the time since an event happened. Useful for tracking how long the user is taking to interact with the page elements.
var last, diff;
$('div').click(function(event) {
if ( last ) {
diff = event.timeStamp - las
2025-03-07
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267
How to use php date function?
Article Introduction：PHP's date() function is one of the most commonly used methods to deal with dates and times. It can format timestamps to the date and time format you want. It's not difficult to use, but some details are prone to errors. Basic usage: The most basic usage of formatting the current time date() is to output the current time. You only need to pass in a format string: echodate("Y-m-dH:i:s"); The above line of code will output a result like this: 2025-04-0514:30:45 Where: Y is a four-digit year (such as 2025), m is a two-digit month (01 to 12), d is a two-digit date (01 to 31), H is a 24-hour hour (00 to 2
2025-07-02
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541
How to use the chrono library in C?
Article Introduction：Using the chrono library in C can allow you to control time and time intervals more accurately. Let's explore the charm of this library. C's chrono library is part of the standard library, which provides a modern way to deal with time and time intervals. For programmers who have suffered from time.h and ctime, chrono is undoubtedly a boon. It not only improves the readability and maintainability of the code, but also provides higher accuracy and flexibility. Let's start with the basics. The chrono library mainly includes the following key components: std::chrono::system_clock: represents the system clock, used to obtain the current time. std::chron
2025-04-28
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1215
golang benchmark test example
Article Introduction：Go's benchmark test is not difficult, the key is to understand its structure and how it runs. 1. The Benchmark function starts with Benchmark and accepts *testing.B parameters, execute the tested code through a loop and automatically adjusts the number of iterations using b.N; 2. When writing, avoid side effects and control variables, and optionally use b.StartTimer/b.StopTimer to control the time interval; 3. Run using getest-bench=., combined with -benchmem to view the memory allocation situation; 4. Notes include avoiding log output, preventing compiler optimization interference, keeping the test environment consistent, and setting -count and -timeout reasonably to improve
2025-07-10
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315
php microtime as float
Article Introduction：To get microtime as float, the call method is $currentTime=microtime(true); which returns a floating point number containing seconds and microseconds. 1. Use microtime(true) to directly obtain floating point numbers in seconds, which is suitable for performance analysis and execution time statistics; 2. Compared with the default return string format, float is more convenient for mathematical operations; 3. You can record the time difference of the time by recording the code through $start and $end; 4. Pay attention to floating point accuracy, time unit conversion and avoid high-frequency calls when using it; 5. Common application scenarios include script execution time statistics, interface response monitoring, logging and timing task control. micro
2025-07-14
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564
How to use `Lock` interface?
Article Introduction：Compared with synchronized, the Lock interface provides more flexible thread synchronization control. 1. Common implementation classes include ReentrantLock (reentrant lock), ReentrantReadWriteLock and WriteLock (read-write separation lock) and StampedLock (efficient read-write lock that supports optimistic reading). 2. The steps to use are: create a Lock instance, call lock() to add a lock, execute critical area code, and finally call unlock() to release the lock. 3. Compared with synchronized, Lock supports trying to add locks (tryLock), timeout waiting (tryLock(time)
2025-06-28
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942
How do you embed a YouTube video using HTML tags?
Article Introduction：To embed YouTube videos, use tags containing the correct source URL and can be customized and responsive. 1. Use the basic code: Replace VIDEO_ID with the actual video ID, such as. 2. Custom behavior: Add parameters to realize options such as automatic playback, start time, control bar and mute, such as src="https://www.youtube.com/embed/dQw4w9WgXcQ?autoplay=1&start=30". 3. Responsive design: wrap iframes with CSS to adapt to different screen sizes, such as using the .video-container class and setting styles. Notice
2025-06-26
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425
How to handle API rate limiting in Python
Article Introduction：The key to dealing with API speed limits is to understand the rules and control the frequency of requests. 1. First check the speed limit information in the API document and response header, clarify the speed limit strategy and the response code after the trigger; 2. Use time.sleep() to control the request interval and dynamically adjust the sleep time according to the remaining number of requests; 3. Automatically manage the speed limit and retry mechanism with third-party libraries such as ratelimit and tenacity; 4. For large-scale tasks, the speed limit controller can record the request status and dynamically adjust the request rhythm to adapt to the speed limit rules of different APIs.
2025-07-11
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439
Using Luxon for Date and Time in?JavaScript
Article Introduction：Luxon is a powerful JavaScript date and time processing library, with its clean and intuitive API, support for time intervals and durations, built-in time zone processing, and parsing and formatting of datetime, intervals and durations, making it an ideal choice for developers. This tutorial will guide you on how to use the Luxon library in your project.
Install
One of the big advantages of Luxon is its cross-platform compatibility, which you can use in a variety of JavaScript environments, for example, loading directly in your browser via CDN.
After adding the following script tag:
You can run the following code in your browser:
let DateTime = luxon.Dat
2025-02-28
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870
Love symbol c Love beating code sharing
Article Introduction：Use C code to draw the beating love, constantly change the size and position of the heart through loops, and clear the screen with ClearDevice(), so that the love can simulate the beating effect. The EasyX graphics library is used to control changes using sinusoidal functions to simulate jumps, but it is necessary to reduce the number of calls to ClearDevice() and set the delay parameters reasonably. This code can be used as a basis and is further improved by customizing colors, special effects and rotations. At the same time, it emphasizes the pleasure of code readability, maintainability and programming.
2025-04-04
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376
Network service installation
Article Introduction：Promotion Conference: This SAE (Business Learning Situation) project aims to develop a real-time "CAT" network discussion application based on a client-server architecture. The application allows multiple clients to connect to a central server and communicate in real time. The following figure out how to overview socket functions: Resource configuration: Programming language: C language version control: Code sharing using distributed Github Development environment: VisualStudioCode, and communicate with WSL Operating system: Ubuntu under Windows (implemented through WSL) Project members: 3 people Project duration: 12 hours Project specification: This SAE project is a client implemented in a local network
2025-04-03
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773
What is Infrastructure as Code (IaC)?
Article Introduction：InfrastructureasCode (IaC) is a method of defining and managing infrastructure through code, which can realize the automated deployment and management of servers, networks, storage and other resources. Its core value lies in improving the repeatability of environmental construction, supporting version control, saving time and cost, and promoting team collaboration. Mainstream tools include Terraform (multi-cloud platform), AWSCloudFormation (specially designed for AWS), Ansible (mainly configuration management), Pulumi (supporting a common programming language), and Chef/Puppet (focusing on server configuration). Getting started with IaC is: selecting platforms and tools, starting with simple resources, and learning to use Gi
2025-07-10
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425
