fix: add length validation of tableData element to avoid TypeError

[Itzaprado]

Changes:

• Add length validation of tableData element, if the element does not exist the length will be set to zero.
• Change if-else validation to ternary operator inside getJoinedViewsForViews function

[gemini-code-assist]

Summary of Changes

Hello @Itzaprado, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the robustness and readability of the LookmlDiagrammer utility functions. The primary goal is to prevent a potential TypeError by adding a length validation for tableData elements, ensuring safe access even when data might be missing. Additionally, it refactors an existing if-else structure into a more streamlined ternary operator, contributing to cleaner and more maintainable code.

Highlights

• Error Prevention: Nullish Coalescing for Length Validation: The pull request introduces a crucial validation step to prevent TypeError exceptions. Specifically, it ensures that when accessing the length property of tableData elements within diagramDict, a default value of 0 is used if the element itself is null or undefined. This is achieved using the nullish coalescing operator (??).
• Code Refactoring: Ternary Operator for Conditional Logic: The getJoinedViewsForViews function has been refactored to replace a multi-line if-else if-else statement with a single, more compact ternary operator. This change improves the readability and conciseness of the sorting logic without altering its behavior.

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[gemini-code-assist]

Code Review

This pull request correctly fixes a potential TypeError when accessing the length of a tableData element by adding a null-check. The refactoring of the sorting logic to a ternary operator is also noted. I've added a comment to further improve the robustness of the sorting logic by explicitly handling cases where field indices might be undefined, which could lead to unpredictable sort behavior.