Trading Margin and Available Quantity to Purchase

Summary The problem requires calculating the additional quantity of gold that can be purchased while maintaining a 15% margin requirement. Given the account details, current holdings, and market price, we need to determine the maximum allowable position value and then calculate the available quantity to purchase. Root Cause The root cause of the complexity in … Read more

“serializable” transactions vs Guarded atomic UPDATE, concurrency racing conditions

Summary The problem at hand is ensuring exactly-once processing for a specific row in a database table, without encountering race conditions. This is crucial in scenarios where multiple users or devices attempt to redeem a coupon or update a record simultaneously. The author has been using serializable transactions with Entity Framework Core to achieve this, … Read more

C#: How to split long-single-line-strings into virtual lines while ensuring that the final result is still a single-long-line at runtime?

Summary The problem at hand is how to split long single-line strings into virtual lines in C# while ensuring the final result remains a single-long-line at runtime. This is particularly useful when dealing with detailed explanations or long messages that need to be emitted but are cumbersome to read and maintain in a single line … Read more

How to adjust placement/alignment of menuitem popup in a menubar?

Summary The issue at hand is misalignment of menu items in a WPF application. The desired outcome is to have the menu items properly aligned within the menu bar. Despite attempts to use HorizontalAlignment or HorizontalContentAlignment, the alignment remains unchanged. Root Cause The root cause of this issue is: Incorrect usage of alignment properties Lack … Read more

How to debug high CPU in chrome tab?

Summary To debug high CPU usage in a Chrome tab, you need to identify the CPU-intensive tasks running on the webpage. The Chrome DevTools provide a set of features to help you diagnose and fix performance issues. Key takeaways include using the Task Manager to identify the problematic tab, and then utilizing the DevTools to … Read more

Output ngModel value only when valid

Summary The issue at hand is the difference in behavior between AngularJS and Angular 19+ when it comes to template-driven forms and validation. In AngularJS, the ng-model value is only updated when the input is valid, whereas in Angular 19+, the ngModel value is always updated, regardless of validation. Root Cause The root cause of … Read more

Coredump generated on crash (segfault, abort), but not when sending corresponding signal (kill -11)

Summary The issue at hand is related to coredump generation on an old embedded Linux platform. When a program crashes naturally, a coredump is generated and sent to a remote server using netcat. However, when the program is manually terminated using kill -11, no coredump is generated. This behavior is unexpected, given that ulimit -c … Read more

Jump in unity using Rigidbody Force

Summary The issue at hand is related to a jump mechanic in a Unity game, where the player can jump multiple times without landing on the ground. This is caused by an incorrect implementation of the jump logic. The current implementation checks if the player is grounded and then applies a force upward to make … Read more