Programming

Questions about C#, Python, Java, algorithms, and code architecture.

ProgrammingFix ZIP Timestamps Error in Homebrew Python Hatchling

Resolve 'ZIP does not support timestamps before 1980' error in Homebrew Python formulas like kosmorro with termcolor 3.3.0 and hatchling. Set SOURCE_DATE_EPOCH to clamp timestamps and fix wheel builds during pip install.

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ProgrammingMarkov Chain Expected Payoff: Exact DP Solution

Compute the exact expected total payoff at stopping time using finite-state Markov chain and dynamic programming. Includes minimal state space, recurrence equations, backward substitution, and Python code for precise fraction.

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ProgrammingC Floating-Point == Comparison Accuracy with 0.1 Steps

Learn why C's == operator fails for floating-point numbers like 0.1 increments due to binary precision. Use epsilon comparison, rounding, fixed-point scaling, and GSL for reliable equality checks and numerical solving.

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ProgrammingPrint Name in C: Alternatives to printf (putchar, puts)

Discover alternative ways to print your name in C without printf: putchar loops, puts/fputs, write calls, ASCII codes, macros. Fix common issues, pros/cons, and beginner tips for print c and output in c basics.

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ProgrammingOracle APEX: Trigger Dynamic Action on Shuttle Close

Learn how to trigger a dynamic action in Oracle APEX when closing a shuttle dialog with selected values. Use apexafterclosedialog event, JavaScript condition for oracle apex item, and refresh interactive grids seamlessly.

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ProgrammingCLion 2025.3 Zephyr RTOS Setup: Fix CMake DTS Error

Fix CMake error 'file COPY_FILE failed to copy zephyr.dts.new' in CLion 2025.3 for Zephyr RTOS projects. Configure west build, CMake toolchain, ZEPHYR_BASE, and board options for STM32. Step-by-step guide with exact commands.

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ProgrammingModeling Stepwise Price Time Series: Change Points & HMM

Forecast stepwise price time series with change point detection, regime-switching (HMM), and survival models. Includes pipeline, libraries, and evaluation tips.

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ProgrammingPolars Rust: Upsample Time-Series Gaps to 5m Intervals

Learn to upsample time-series gaps in Polars Rust to exact 5-minute intervals using date_range, vstack, and forward fill. Preserve non-aligned timestamps like 00:05:17 without replacement. Rust code examples for sensors data.

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ProgrammingDetect System Clock Tampering in C++20 with std::chrono

Learn to detect system clock tampering and time jumps in C++20 for cross-platform security agents. Use std::chrono::system_clock vs steady_clock polling, Windows Event ID 4616, Linux timerfd for reliable protection against clock manipulation.

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ProgrammingPython lambda in loop: closure capture and fixes explained

Why do Python lambdas in a loop capture the final value? Learn Python closures (late binding), the lambda default-argument fix, and recommended lazy-initialization patterns.

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ProgrammingSupabase C# Client: Fix InitializeAsync Hanging Issue

Fix Supabase C# client hangs on InitializeAsync: use project URL and anon key, disable realtime, check IP/network, and avoid async init deadlocks. Log errors.

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ProgrammingAltova MapForce: Build full JSONPath using UDFs and Java

How to build a full JSONPath (e.g., $.user.profile.contact.email) in Altova MapForce using node-name and a recursive UDF. Also covers Java helper and arrays.

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ProgrammingJxBrowser Chromium Huge VIRT on Linux: Causes & Limits

Why JxBrowser's Chromium subprocesses show massive VIRT (32GB-1TB+) on Linux in top, VIRT vs RSS explained, and fixes: Chromium flags via EngineOptions, ulimit, cgroups, /dev/shm for Docker to prevent JavaFX JVM crashes.

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ProgrammingPyTorch Dataset/DataLoader for Multivariate Time Series

Fix PyTorch Dataset and DataLoader for multivariate time series preprocessing from CSV. Ensure (B, V, L) shapes, avoid data leakage with proper scaling, and validate sliding windows for MAMBA models.

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ProgrammingCapture Real Exceptions in .NET MAUI Windows (Visual Studio)

Diagnose runtime errors in .NET MAUI Windows: make Visual Studio break on thrown CLR exceptions, enable WinUI diagnostics, and collect dumps for full stacks.

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ProgrammingGenerate Regex Patterns from Input-Output Pairs with Code

Generate regex patterns from input-output examples to extract values (e.g., '2457' from 'example/123/2457'). Use online tools, grex, and Python/Java automation.

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ProgrammingTensorFlow Backprop: Mixed Real & Complex Functions

Learn how TensorFlow handles backpropagation through mixed real and complex-valued functions using Wirtinger derivatives, GradientTape, and complex-aware ops. Covers chain rule, domain boundaries, and practical tips for CVNNs in comms systems.

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ProgrammingDGL with PyTorch 2.8 on RTX 50 - Compatibility Guide

DGL compatibility with PyTorch 2.8 and RTX 50 GPUs: recommended DGL/PyTorch/CUDA combos, Docker, prebuilt wheels, or build from source for Blackwell support.

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ProgrammingSFINAE, if constexpr & partial specialization for SFRegT

SFRegT with compile-time and runtime register addresses using SFINAE, if constexpr, and partial specialization. Code examples, patterns, and trade-offs.

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ProgrammingDay.js ISO 8601 Strict Parsing Fails: Why & How to Fix

Discover why Day.js strict ISO 8601 parsing fails for valid strings like 2024-03-10T15:30:00Z. Learn reliable validation using built-in parsers, customParseFormat, regex, UTC plugin, and code examples for robust date handling.

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