Questions tagged [datetime]
DateTime objects in many programming languages describe an instant in time, expressed as a date and time of day. Use on questions about reviewing code involving date/time logic.
1,044 questions
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Support Captain Picker in Vanilla JavaScript
I have been tinkering about a program that would pick the support "captain" of the day on workdays with the following rules:
Program should only pick a captain on weekdays (Mon. to Fri.).
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a Hebrew Date picker package in Flutter: single and range date selections
I have implemented a working Hebrew Date Picker package (link on pub.dev) in Flutter that supports both single date and date range selection.
Here's what the date picker looks like in action:
Single ...
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Rust implementation of an algorithm I invented (RANDEVU) #2
I came up with an algorithm and created a Rust implementation of it.
I've already posted it for code review previously but created another post since I've made many changes to it, including the ones ...
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Plot number of concurrent jobs on time axel
Description:
Calculate the number of concurrently running jobs for any given minute during a day. Each Job is scheduled to run X ...
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Evaluating Extended Operating Hours Past Midnight Across Timezones in PHP
I am working on a project that involves tracking the operating hours of businesses across different timezones. Some of these businesses operate past midnight, and to accommodate this, operating hours ...
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Return a set of geodetic coordinates for a particular moment in time
Use case
The user is interested in supplying a timestamp of a particular moment in time. This python application will perform two astronomy calculations for a set list of planetary bodies:
Calculate ...
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RANDEVU - Rust crate implementing a simple algorithm I invented
I've created a simple algorithm, implemented it in Rust, and published it as a crate on crates.io.
https://crates.io/crates/randevu
My code seems pretty clean and idiomatic to me, but I'd like to know ...
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Goal: Writing Effective Unit Tests to Ensure a Datetime Conversion To/From Local-UTC Works
As the title lists, I am trying to write an effective unittest suite to ensure that the function that converts a date to UTC from local or vice-versa is doing as planned. But it seems hard because ...
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Subtract two lap times (m:ss:fff)
I have two lap time strings I need to subtract, the format is minutes, seconds, milliseconds. This is to compare a new world record time to the previous holder's ...
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Python: Return list of keys if current time is within the range
This is the program I have written to return the list of keys if the current hour is present within the range provided.
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Determine if it is EU summer time in Java
I wanted to write a utility method for learning purposes to determine if a given date (year, month and day) falls within EU summer time or not, without using any of the Java library methods. Is here ...
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Convert durations to a single unit
In the codebase I inherited, I have this function which converts a number and unit into milliseconds:
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Four functions to measure and compare months of duration from one or two dates
I decided to write a few related examples of code, and honestly I don't know if I am overthinking, or just trying to find what is that right way to write functions and how to use them, so that ...
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Receiving a daily reward
I'm doing a daily reward system on my site.
Users can pick up the reward only once a day. The next reward can be picked up the next day, also, only once.
When a user visits the site to pick up a daily ...
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List consecutive days
I created this method for consecutive days to be listed with a dash, non-consecutive are separated by “and”. In my UI control I am only getting back a ...
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Date Checking in C++
I am working on one of my assignments (Hash Tables) for my Data Structures class(1st year), the assignment focuses on OOP and understanding of Hash Tables.
Restrictions:
Usage of raw pointers
C++11 ...
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Comparing date in RPGLE
I have an RPG program which processes a file containing records of subscription details of users. Each subscription record has a "valid from date" and "valid to date" - indicating ...
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Calculate overlap of two datetime objects
I would like to find out how much time lays in between 22.00 and 6.00 o’clock for a given event per day.
So if the event start at 21.00 and ends at 23.59 the result would be 1.59. For a start at 22.00 ...
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A function that uses a regex to parse date and time and returns a datetime object
The code works, but I think can be simplified, I don't know which specific steps, but my version seems to me quite complicated
I build a function that takes a specific string format and returns a <...
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How to handle optional date parameters?
When creating a function to be reusable throughout the project I came across something strange. After looking at this function it looks very much like it could be refactored.
The function should only ...
- 401
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Determine age from given birth date
So this is my first ever attempt so it's obviously bad. There has to be a better way to do this. A big thing I haven't implemented is trying to guarantee the structure of the input(i.e making sure ...
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Generates list of intervals using the biggest different time unit within period
I've created a function to split a period into the biggest different time unit possible. It can be years, months, ...
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Algorithm that prints day, when submitted date
I would love to know your opinion about this algorithm that we wrote in class. I was thinking about how I can optimize it (in terms of size of code/complexity) without using library functions (...
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PHP Laravel Check if given date is a week or a regular day
I have a problem. In my project the user can copy a menu for a specific day or for a specific week. The value that will be sent to the back-end will be something like:
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Simple ISO date, time and datetime implementation
I am getting started with rust. To get familiar with the language I implemented a datetime library:
main.rs
...
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Saving and reading the last successful execution as a json-file
I've got some tools that run perdiodically like weekly or monthly that don't support any retry mechanism. In order to increase their chance to succeed in case a database wasn't reachable or some other ...
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893
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Unix epoch seconds corresponding to midnight in a local time zone
I came up with the following function to obtain epoch seconds that correspond to previous midnight in a local time zone:
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Simple TimeStamp class in Python
For a project I'm working on we need a basic time holder class. This is written in CircuitPython, which is a stripped down version of CPython that's missing a number of libraries, including the whole ...
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Generating a selection of dates from a given date to the current one, in equal three-month intervals
I need to get a selection of dates from the given to the current, breaking the range of dates into equal parts of 3 months. My code works, but it's clearly not perfect. Give advice on code refactoring....
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timeConversion - C function to convert 12-hour AM/PM format into military time [closed]
I have written a program in C, which given a time in 12-hour AM/PM format, converts it to military time (24 hours).
Function Description
The timeConversion function should return a new string ...
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116
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Search between dates in a WP Query
In the posts I have a date field and a start and end date range. I need to query if it matches date or if it matches between the dates in the range. This Query works, but how can I optimize?
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Formatting timestamps during autumn DST switchover
I've written code that 99.x% of the time does the same thing as
def format(timestamp: datetime) -> str:
return timestamp.strftime("%X")
but ...
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Constraining a templated method to accept any integral std::chrono::time_point
Recently I was writing a class that had overloaded read methods for various data types. One of the sets of types I wanted to handle were integral ...
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JS function to check if a date is in the correct format
I wrote the following JS function to check if a date comes in the right format and can be used further down in the application
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Check how many days a country has been independent
I have been using a website called 'CSNewbies' to learn Python and one of the tasks was to create a way for a user to check how many days a country has been independent. The countries are limited to ...
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Removing medications older than 180 days ago from a list
I have the following code which removes a dict from a list of dicts in Python based on ...
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Clear output line in terminal after use for countdown (different length strings)
The method to overwrite the same line is well known and I use it for countdown, but what about when the next output string has a different size and will be generated by a single print? That's the ...
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Convert string to date C++
New to C++ here, by combining different pieces of code I've found, i came with this solution below to convert a date in string to a date object. It works as I want but I'm not certain to do the ...
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12 hour to 24 hour time conversion
doing hackerrank challenges and been learning python3 for a month now, made this code to convert and return 12 hour to 24 hour time format in one of the challenges
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Extract the last row in a dataframe with a timestamp before some given time
Related questions: I need to take specific row from different df to generate new df. How can I make my code faster?
I want to take the last data before the specified time from different time intervals ...
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203
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Generate date_range for string intervals like 09:00-10:00/11:00-14:00/15:00-18:00 and calculate the working minutes
I'm a bit new in python and I'm trying to achieve what I can't with VBA, get things faster.
I have large datasets like this in the source(just a sample):
This is done also by python and it's a CSV ...
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Calculate working Hours in given shift time
This is simple program to calculate working hours in given shift..
It is also return user sessions and presence of user shift.
while this works fine. I would like suggestion to improve it.
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Extraction of subsets by date and intervals from a dataframe with a specific date format
Given the following dataframe:
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Get random time between two time inputs
This code takes two times as input and then calculates a random time between the two inputs.
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Create a formatted calendar
I'm working on a project that creates a calendar based on user input of a month and a year. With that information, the code should count the number of days in that month and output a calendar. I would ...
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Calculate time interval excluding breaks
I have a solution for a question I asked on SO:
I am trying to create a database where I also need to find the time
difference inside a record. However, timediff() ...
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Date range generator
An app has a feature that's much like any calendar application (like the Outlook calendar for example).
Consequently, I need to do a lot of date logic. I wrote a class with date calculation methods ...
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simulation of updating a dataset from real time data
In this code (reproducible example), I want to generate a dataframe composed by random dates in the first col, and by random numbers (in reality they will be generate from a socket) in the second ...
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Javascript date / time display
I'm writing a simple start page and it's my first time with JavaScript, my previous background is Python/VBScript. Is it good enough? What best practices should I apply? Should I compress and nest the ...
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Find the earliest date from a series of inputs
I need to find minimal date (year, month, day, hours, minutes, seconds).
My code is working, but it looks terrible and it's very long. What can I do to avoid this ladder and make my code readable? (I ...
