Why does swapping root.left and root.right using a temporary variable work, but a seemingly equivalent approach fails?

Summary The problem lies in understanding Java reference semantics when swapping fields in a binary tree node. Two approaches are compared: one that works by swapping root.left and root.right using a temporary variable, and another that fails when trying to achieve the same result but through a different assignment sequence. The key to understanding this … Read more

APL screen always renders after speak finishes – is async render with long speech possible?

Summary The Alexa Presentation Language (APL) is used to create visual experiences for Alexa skills on devices with screens, such as the Echo Show. However, the APL screen rendering is deferred until speech completes, causing visual feedback to appear late and making the screen feel secondary. This limitation is particularly noticeable in storytelling use cases … Read more

How to print or log from Groovy policy in Boomi API Gateway (Gravitee underlying gateway)?

Summary The problem at hand is logging or printing debug values from a Groovy policy in Boomi API Gateway, which uses Gravitee APIM Gateway 3.3.13 as its underlying gateway. The goal is to find a supported method to log to Boomi Gateway logs, log to Gravitee logs, or output debug statements from within a Groovy … Read more

Microsoft Graph Webhook: Why don’t I receive notifications about permission changes for SharePoint?

Summary The Microsoft Graph Webhook is a powerful tool for receiving notifications about changes to files and permissions in Microsoft services like OneDrive and SharePoint. However, permission change notifications for SharePoint files are not received when using the Graph webhook, despite following the official documentation. This article aims to explore the root cause of this … Read more

How to prevent SSDT/DACPAC publish with DropObjectsNotInSource=True from dropping Azure Functions az_func runtime tables

Summary The problem arises when using SSDT/DACPAC publish with DropObjectsNotInSource=True, which drops objects not present in the source. This causes issues with Azure Functions runtime tables in the az_func schema, leading to loss of runtime state. The goal is to prevent dropping objects in the az_func schema while maintaining DropObjectsNotInSource=True for other schemas. Root Cause … Read more

firefox extension: how do i write/update the side bar from firefox extension?

Summary To update or dynamically write messages from a Firefox extension onto the sidebar, you need to use the WebExtensions API, specifically the browser.sidebarAction or browser.action APIs, in combination with HTML and JavaScript. The key takeaway is that you must declare the necessary permissions in your extension’s manifest.json file and use the correct API methods … Read more