date
DataFrame
| date | DataFrame | |
|---|---|---|
| 24 | 109 | |
| 3,044 | 2,275 | |
| - | - | |
| 5.5 | 9.4 | |
| 17 days ago | 4 days ago | |
| C++ | C++ | |
| GNU General Public License v3.0 or later | BSD 3-clause "New" or "Revised" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
date
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Ask HN: Did you encounter any Leap Year bugs today? How bad was it?
> but I'd be surprised if there was not a modern date library for C++
The standard library now includes . AFAIK: It was mostly written by Howard Hinnant. He now has more date/time libs that expand upon : https://github.com/HowardHinnant/date
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Why no std::chrono::year_month_day::operatator+=(const std::chrono::days&)?
Ah: https://github.com/HowardHinnant/date/issues/178 https://stackoverflow.com/questions/62734974/how-do-i-add-a-number-of-days-to-a-date-in-c20-chrono
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Converting text to std::chrono::timepoint
If you’re using an earlier standard you can use this, which the ‘official’ date/time zone stuff was based on: https://github.com/HowardHinnant/date
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std::chrono Calculating an ordinal date and get the week number from an ordinal date
If you don't have C++20, or if your vendor hasn't shipped it yet, here is a free, open-source, header-only preview of this part of C++20 that you can use: https://github.com/HowardHinnant/date
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Libstdc++ Gets C++20 Chrono
C++20 adds the timezone/caldendaring/formatting from Howard Hinnat’s Date Library https://github.com/howardhinnant/date .
So calendrical calculations and time zone support.
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need help with constructing time with std::chrono
Unfortunately only implemented in MSVC right now, for other compilers and/or if you want to do anything with dates I suggest you use https://github.com/HowardHinnant/date directly, chrono is good enough for measuring time but if you do more complex things it can get a bit wild.
- Is there a port of the C++20 chrono library to C++17? MSVC and GCC
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Is there any Date library like datetime from python
Here is the original calendar library that was adopted in C++20 (corrected link).
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How to get epoch time to a specific date in C++? (Using std::chrono)
In lower C++ standards I would highly recommend including this as a header-only library: https://github.com/HowardHinnant/date. This was the basis for the new date/timezone functionality in C++20, so it's nearly identical and works down to C++11.
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working with std::chrono
So you want date time functionality? Those come with c++20 otherwise you can use this. The author Howard Hinnant is the author of c++ chrono had have a few excellent video on YouTube explaining how to use chrono.
DataFrame
- New multithreaded version of C++ DataFrame was released
- DataFrame: NEW Data - star count:2013.0
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C++ DataFrame vs. Polars
For a while, I have been hearing that Polars is so frighteningly fast that you shouldn’t look directly at it with unprotected eyes. So, I finally found time to learn a bit about Polars and write a very simple test/comparison for C++ DataFrame vs. Polars.
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C++ Show and Tell - July 2023
I have worked on C++ DataFrame for the past 5+ years in my spare times. It is comparable to Pandas or R data.frame, although it includes a lot more functionality.
- Allocators; one of the ignored souls of STL
What are some alternatives?
pandas_market_calendars - Exchange calendars to use with pandas for trading applications
datatable - A Python package for manipulating 2-dimensional tabular data structures
abseil-cpp - Abseil Common Libraries (C++)
db-benchmark - reproducible benchmark of database-like ops
rescript-date - 📆 Date manipulation in ReScript.
sktime - A unified framework for machine learning with time series
zeitkatze - time cat -- literally. Available as AUR package
polars - Dataframes powered by a multithreaded, vectorized query engine, written in Rust
nepali-datetime - Python's core datetime inspired Bikram Sambat (BS date) & Nepal Time (NPT) package🇳🇵
zhetapi - A C++ ML and numerical analysis API, with an accompanying scripting language.
STL - MSVC's implementation of the C++ Standard Library.
faiss - A library for efficient similarity search and clustering of dense vectors.