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Writing an Interpreter: Implementation

Part 1 can be found here.

Lexer

The Lexer serves as the most basic element. Its primary function involves iterating through the characters present in the source code. It may combine certain characters to create a single token and subsequently generate a token object with its associated type. This object is then added to the resulting list.

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Utilize OpenAI API to Extract Information From PDF Files

Why It's Hard to Extract Information From PDF Files?

PDF, or Portable Document Format, is a popular file format that is widely used for documents such as invoices, purchase orders, and other business documents. However, extracting information from PDFs can be a challenging task for developers.

One reason why it is difficult to extract information from PDFs is that the format is not structured. Unlike HTML, which has a specific format for tables and headers that developers can easily identify, PDFs do not have a consistent layout for information. This makes it harder for developers to know where to find the specific information they need.

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Using Appropriate Annotations in Spring Testing

1. Introduction

There's heavy use of annotations in Spring Framework. This makes confusion about what annotations should be used especially in tests. It sometimes ends up with adding redundant annotations or the tests not working as expected. On StackOverflow, you can easily find the developers who make mistakes with Spring annotations or someone who makes things work but does not fully understand why.

To make things clear, in this article, I would summarize the annotations we should use in each testing scenario using JUnit 5 and Spring Test Framework.