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Article Introduction：Python's datetime module supports time zone processing through zoneinfo. To create date and time objects, you can use date, time, datetime, and timedelta classes; for example datetime.now() gets the current time. To parse or format strings, strptime and strftime are available. In terms of time zone processing, it is easier to introduce zoneinfo after Python 3.9, such as using ZoneInfo ("America/New_York") to assign time zone information. Key points include: Ensure that the datetime object is "conscious" (including time zone), and avoid mixing "unconscious" pairs

2025-06-12 comment 0  334

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 comment 0  776

Article Introduction：Go's time.Format() method formats the time string through the reference time MonJan215:04:05MST2006, and replaces the corresponding part in the template with specific values. For example: annual use "2006", monthly use "01", daily use "02", hour (24-hour system) use "15", minute use "04", second use "05", time zone use "MST"; common formats such as "2006-01-0215:04:05" represent the complete date and time,

2025-06-23 comment 0  349

Article Introduction：Common formats for date function include Y (four-bit year), m (zero month), n (no zero month), d (zero date), j (no zero date), H (24-hour hours), h (12-hour hours), i (minutes), s (seconds), A (AM/PM), for example, date('Y-m-dH:i:s') output standard time format; format Chinese customary time can be used to date('Y year n month j day H point i minute s seconds'), paired with n and j to avoid leading zeros; converting timestamps requires passing in the value generated by strtotime as the second parameter; common techniques include using date('Ymd_His'), generating file names, using date('Y'), outputting copyright year, and comparing whether the date is

2025-07-05 comment 0  832

Article Introduction：It is recommended to use the DatePeriod class to traverse date ranges in PHP. 1. The DatePeriod class was introduced from PHP5.3, and date traversal is implemented by setting the start date, end date and interval. For example, generate a date list from 2024-01-01 to 2024-01-05, which does not include the end date by default; 2. If you need to include the end date, you can adjust the end date or set the INCLUDE_END_DATE parameter; 3. The manual loop method can also complete the traversal using the DateTime object and the modify() method, which is suitable for scenarios where step size needs to be flexibly controlled; 4. Pay attention to the time zone problem that should be explicitly set to avoid the system's default time zone affecting the result; 5. PHP automatically handles leap years

2025-07-14 comment 0  159

Article Introduction：Comparison operators (such as =, >) are used in SQL to compare two date expressions to determine their relationship. For example, startDate < endDate returns True, indicating that startDate is earlier than endDate. Notes include data type matching, time zone consistency, and null value processing.

2025-04-10 comment 0  682

Article Introduction：Laravel 11.42 version introduces a set of practical relative date query builder methods, simplifying date-related query logic. While there is no need to refactor all applications to use these methods, they do provide a more concise and easy-to-read advantage to the relative date logic in the model. Let's take a look at it with the example of the Article model. Suppose you have a scope for getting published articles with a specific state, and the published_at date must be equal to or earlier than the current time: use Illuminate\Database\Eloquent\Builder; use App\Models\Article; publi

2025-03-05 comment 0  486

Article Introduction：Choosing the right MySQL data type is critical to performance and storage efficiency. Integer types should be selected reasonably based on the value range and storage space. For example, tinyint is suitable for the status field, int is suitable for most scenarios, and bigint is used for super large values; avoid waste caused by using bigint all, and the unsigned attribute can be used to expand the positive range. String types should be selected as needed, char is suitable for fixed-length fields, varchar is suitable for variable-length content, and text series is used for large text; avoid abuse of varchar(255), and should be optimized according to actual length. Date and time types include date, time, datetime and timestamp, where timestamp accounts for

2025-06-26 comment 0  206

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 comment 0  876

Article Introduction：date_create_from_format is used to parse time strings in non-standard format to generate DateTime objects. When you get a non-ISO8601 standard time string such as "25/12/202415:30" or "December 25, 2024", you can use this function to specify the format to parse. The usage method is DateTime::createFromFormat('format','time string'), for example, match "25/12/202414:30" with 'd/m/YH:i'. Common format characters include d (date), m (month), and Y (year

2025-07-07 comment 0  797

Article Introduction：The method of getting the day of the week in PHP is as follows: 1. Use the date() function to match the 'w' or 'l' parameters to get the current week in the form of a number or English name respectively; 2. Convert it to Chinese week through a custom mapping array; 3. Use strtotime() to get the week of the specified date; 4. Pay attention to setting the time zone to ensure the accuracy of the results. For example, date('w') returns 0~6 to mean Sunday to Saturday, date('l') returns the complete English week name, and can output Chinese weekdays with a mapping array. When processing non-current dates, you need to use strtotime() to convert it to a timestamp and then pass it in date(). If the result is abnormal, check and set the correct time zone such as Asia/Shanghai.

2025-07-08 comment 0  701

Article Introduction：The choice of data type is important because it determines storage space, query efficiency, data integrity and accuracy. For example, using VARCHAR to store years will lead to low range query efficiency, while DECIMAL can avoid the problem of loss of accuracy in amount calculation; numerical types should choose TINYINT, SMALLINT, INT or BIGINT according to size to avoid wasting or overflow; character types should choose CHAR, VARCHAR or TEXT as required to avoid abuse of VARCHAR (255); date and time types should choose DATE, DATETIME, etc. according to accuracy and time zone requirements; common misunderstandings include processing numbers as strings to cause sorting errors, ignoring character sets to cause storage problems, and not considering future scalability.

2025-07-12 comment 0  422

Article Introduction：The core difference between Duration and Period is that Duration represents a fixed time length, measured in seconds, minutes, hours, etc., and is not affected by calendar rules; Period represents a date difference based on the calendar, taking into account month and year changes. For example, a day in Duration is always 24 hours, while a day in Period may be adjusted to 23 or 25 hours due to daylight saving time. Duration is suitable for precise time measurements, such as calculating function run time or processing UTC timestamps; Period is suitable for scenarios involving calendar logic, such as calculating age or scheduling tasks by month. In code, Java's Duration is suitable for Instant, providing nanosecond precision, while Per

2025-06-27 comment 0  238

Article Introduction：The major revisions of iOS 18 and iPadOS 18 Photos App have caused confusion and dissatisfaction among users. Many users are used to sorting old photo apps. The new version is sorted by the creation time of film and video rather than dates, which leads to some problems. For example, if you receive photos shared via airdrop a week ago, these photos will be placed in an older time period and are difficult to find, rather than appearing at the bottom of the album as most users expect. Fortunately, iOS 18 allows you to change the sort of photos to "Recently Added" instead of "Shot Date" (i.e. when you create it). A lot of complaints about the new photo app are solved with just a simple tweak. How to sort photos by adding date instead of creating time in iOS 18

2025-05-11 comment 0  1058

Article Introduction：The basic format of DateInterval starts with P and contains the year, month, day, and time. It must be written in order and the corresponding letters must be used. The standard format is P year Y[D]T hour H[second S], for example, P1D represents one day, and PT1H30M represents one hour and thirty minutes. Common errors include the lack of P, the order is reversed, the time part is missing T, and spaces or symbols before the number. When used in actual use, DateInterval usually performs date addition and subtraction operations with DateTime objects, and can also be used to traverse date ranges. In addition, it supports the rapid creation of common intervals such as daily, weekly, and monthly, but does not support logic such as "one day of the month" and requires additional processing. Mastering format rules is to use DateInterv correctly

2025-07-17 comment 0  244

Article Introduction：SETBIT sets the bit value of the specified position, and BITCOUNT counts the number of digits of 1. SETBIT is used to set 0 or 1 according to the offset in the Redis string. For example, SETBITmykey31 sets the third bit to 1; BITCOUNT uses BITCOUNT mykey to count all digits with a value of 1, and supports specified byte range statistics. Both are suitable for efficient storage of Boolean values, such as user active tracking, functional switch management and real-time analysis. For example, use the user ID date as the key and the mid-year and day as the offset to record the login status and count the total number of login days.

2025-07-04 comment 0  437

Article Introduction：Use Vuemixins to multiplex logic across components, especially for shared methods, lifecycle hooks, and data options. For example, it is used for date formatting, data loading status management, or modal box behavior uniformity. By extracting public logic into mixin, the components can be kept clean and duplicate code is reduced. At the same time, mixin supports overwriting or extending its behavior within components, but over-customization can lead to maintenance difficulties. Overall, mixins are suitable for simple and direct logical multiplexing between components.

2025-06-25 comment 0  964

Article Introduction：Android 12: Seven new features worth trying Google released the Android 12 system in May 2021 and will continue to update to add more features. At present, Android 12 has been officially launched to the public, and Google Pixel series phones (starting from Pixel 3) are the first to upgrade. If you are not a Pixel user, the upgrade time depends on the mobile phone manufacturer. For example, Samsung and OnePlus have begun testing the beta version of Android 12, but the final release date has not been announced yet. Android 12 brings significant design and functionality improvements, making it the most powerful, secure, and mature Android version to date. 1. Quick pause notification A

2025-02-25 comment 0  659

Article Introduction：In PHP, add 6 months to date. The commonly used method is to use the DateTime class with the modify() or add() method. 1. Use modify('6months') to achieve rapid implementation, but may jump when processing the end of the month. For example, 2024-03-31 plus six months will become 2024-09-30; 2. Use add(newDateInterval('P6M'))) to be more flexible and controllable, suitable for complex logic; 3. If you need to retain the "end of the month" semantics, you can adjust them in combination with modify('lastday of thismonth'); 4. Pay attention to the uniform time zone settings and date formats, and it is recommended to use YYYY-MM-DD to avoid parsing errors.

2025-07-06 comment 0  811

Article Introduction：Mutators are methods to modify data before setting model attributes, with the naming format set{AttributeName}Attribute; Accessors are methods to modify data when obtaining attributes, with the naming format get{AttributeName}Attribute. For example, setNameAttribute can convert the user name to lowercase and then store it; getCreatedAtAttribute can format date output. Common uses include cleaning input, encrypting sensitive fields, formatting time amount and other display content. When using it, you should pay attention to the case sensitivity of field names to avoid recursive calls causing dead loops. You should operate $this->

2025-07-13 comment 0  344