Summary The OpenXLSX library is being used to read and manipulate xlsx files, but the execution time is slow, taking 33.3 seconds to save a file as csv, compared to 4 seconds using VB scripts. The bottleneck lies in the XLCell c=wks.cell(i, 1) line, which consumes 30.8 out of the 33.3 seconds. Root Cause The … Read more
Summary The given PostgreSQL query is optimized for cursor-based paging using indexes on activity_date and id, as well as birth_date and gender. However, the addition of the spatial search condition ST_DWithin(location, ST_MakePoint(?, ?), 20000) significantly slows down the query execution. This article aims to explore the root cause of this issue and provide optimization strategies. … Read more
Summary The problem at hand involves calling a macro when a slicer selection changes in a table. This requires understanding how to capture events in Excel and execute macros based on those events. The goal is to change the font color of a textbox when the slicer selection changes. Root Cause The root cause of … Read more
Summary The issue at hand is related to the behavior of LINQ’s OrderBy and ThenBy methods in C#. When using these methods to sort a collection, the ThenBy method evaluates its key selector for all elements, not just the ones that remain after the initial OrderBy. This can lead to unnecessary evaluations and potential performance … Read more
Summary The problem revolves around implementing a state machine for an entity with multiple statuses in a database, using a Rich Domain Model. The goal is to manage correct transitions between these statuses and transfer available actions to the front end. Key considerations include data consistency, scalability, and user experience. Root Cause The root cause … Read more
Summary The question revolves around transforming XML to JSON in Azure Logic Apps while preserving the original data types. This is crucial for maintaining data integrity during the integration process. The intended flow involves XML transformation using XSLT, followed by XML validation, and finally conversion to JSON. Root Cause The root cause of the challenge … Read more
Summary The interaction between C++ object lifetime and arrays from C code is a complex issue, particularly when dealing with shared memory and zero-copy operations. The C++ specification does not provide clear guidance on how object lifetime interacts with functions implemented in C code, leading to undefined behavior in certain scenarios. Root Cause The root … Read more
Summary When it comes to customizing the appearance of a QWidget in PyQt, developers often face the dilemma of choosing between using setStyleSheet or setPalette (or setAutoFillBackground and setBackgroundColor) for coloring, and setFont or setStyleSheet for setting font properties. The choice between these methods depends on the specific requirements of the application and the desired … Read more
Summary The question of why Java isn’t commonly used for commercial 3D game development can be answered by examining several key factors, including performance, ecosystem, engine support, and garbage collection. Despite Java’s advantages, such as being cross-platform and having a large ecosystem of libraries, it faces challenges in the game development industry. Root Cause The … Read more
Summary The issue at hand involves mismatched spans in Azure Monitor when using SerilogTracing in an ASP.NET Core 8 Web API. This results in inconsistent tracing and incorrect filtering of activities in the App Insights operation view. The root cause of this issue lies in the way activities are started and managed within the application. … Read more