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Why 0.1 + 0.2 breaks wallets: money math in JavaScript and every other language
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Why 0.1 + 0.2 breaks wallets: money math in JavaScript and every other language

DEV Community: reactnative·Bogdan Umaniuk·about 24 hours ago
#xn9sZ6bJ
#devtoreactnative#devto#dev#enter#exit

I work on the mobile app of a crypto exchange, in React Native and native Android. Most of the money...

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Splitting loan payments into principal and interest with Decimal, and generating the journal entries
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Splitting loan payments into principal and interest with Decimal, and generating the journal entries

DEV Community: tutorial·Damin Mutti·3 days ago
#fTuVvZSC
#devtotutorial#devto#dev#decimal#payment

To split a loan payment into principal and interest in code, compute each month's interest as the...

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Wells Fargo statements: using the half-empty 'Ending daily balance' column as a free parser test
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Wells Fargo statements: using the half-empty 'Ending daily balance' column as a free parser test

DEV Community: python·Damin Mutti·4 days ago
#ejUi9EGl
#devtopython#devto#dev#balance#decimal

Wells Fargo statements print an ending daily balance only on the last transaction of each day,...

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Why ChatGPT will silently lie about your bank statement (and how to catch it)
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Why ChatGPT will silently lie about your bank statement (and how to catch it)

DEV Community·Kyr·6 months ago
#tTFXKRIK
#ai#llm#python#every#statement

Modern LLMs are excellent at looking right - and for bank-statement extraction, looking right is the failure mode you cannot catch by eye. Here's the 20 lines of Python that separate a plausible answer from a reconciled one.

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Testing a Go exchange API client: mocks, httptest and testcontainers
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Testing a Go exchange API client: mocks, httptest and testcontainers

DEV Community·Odilon HUGONNOT·6 months ago
#UHZJbryN
#go#tests#api#binance#exchange

You can't hit the real Binance API in tests. ExchangeClient interface, mockgen mocks, httptest for parsing real responses, testcontainers for PostgreSQL integration tests.

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