DDD в Go без красивых схем: как один платеж получил три курса валют

В какой-то момент у нас один платеж начал жить с тремя курсами валют: checkout показывал сумму из Redis, payment-service ходил в API, а ledger писал проводку по снапшоту из Postgres. Расхождения были 2-5 тенге, иногда до 180. Разбираю, как это дебажили, какие костыли ставили и где DDD реально помог, без красивых схем. Читать статью

https://habr.com/ru/articles/1025226/

#ddd #domaindriven_design #go #golang #архитектура #value_object #aggregate_root #платежи #курсывалют #decimal

How to Stop Decimal Precision From Losing Money

Floating point can silently drop cents.

#mysql #decimal #float #howto #money #bug

https://www.youtube.com/watch?v=25gvtTJ21QA

I just released decimal-java 2.0.1, https://github.com/FirebirdSQL/decimal-java/releases/tag/v2.0.1. Decimal-java is a library to convert java.math.BigDecimal to and from IEEE-754r (IEEE-754-2008) decimal byte representations.

Compared to decimal-java 2.0.0, this version adds JSpecify nullability annotations.

#decimal #ieee754 #java

Decimal Precision Rounds Numbers?!

DECIMAL precision ROUNDS values! Cast 1.999 to DECIMAL(5,2) and it becomes 2.00. This silent rounding will cause calculation errors!

#sql #sqltricks #decimal #precision #rounding #sqlweird #sqlquiz #codingchallenge #sqlshorts #sqlwtf #datatypes #advancedsql

https://www.youtube.com/watch?v=wNyhCqAhlb8

Happy 60th anniversary of Changeover Day (Australia). 🎵🎶In come the dollars and in come the cents
to replace the pounds and the shillings and the pence.🎶🎵

Here's a piece I wrote on one of the last Australian pennies, saved as a keyring: https://coinofnote.com/1963-australian-penny-keyring/

Here's a blog Michelle J Morgan wrote on the song: https://michellejmorgan.com.au/blog/on-the-14th-of-february-1966/

And here's the Royal Australian Mint's article on today, with description of the coin design released this year to commemorate it: https://www.ramint.gov.au/about-us/whats-new/2026-sixty-years-australian-decimal-currency

#Numismatics #CoinCollecting #Currency #Changeover #Decimal #Coins #History #Histodons @numismatics @histodons

bit of australian folklore to start the day #decimal #currency #imperial

https://www.abc.net.au/news/2026-02-14/australia-marks-60-years-since-switching-to-decimal-currency/106328652

Learn about numeric data types (and the number 998,001) in Python

The value 1 / 998,001 has an interesting property, but to see it in Python you need to learn about numeric data types.

https://rodstephensbooks.com/many_digits.html

#Python #FloatingPoint #Decimal #Precision

Round Number via 3 Methods

Round Number via 3 Methods This content explores interesting aspects of this topic. The information provided offers valuable insights and perspectives. Understanding this reveals how everyday things are more thoughtful than they appear. Next time you'll notice this detail. This fascinating detail shows how much thought goes into things we take for granted.

#python #coding #programming #tutorial #math #round #decimal

https://www.youtube.com/watch?v=4EbTU9onToU