Return to JavaScript Version History, JavaScript-ECMAScript

ECMAScript 1.5, often referred to as JavaScript 1.5, is a specific version of the ECMAScript standard that corresponds closely with the JavaScript implementation in Netscape Navigator 6.0. It's important to note that there isn't an official “ECMAScript 1.5” version in the ECMAScript standardization history as recognized by ECMA International. The ECMAScript versions officially recognized by ECMA International went from ECMAScript 1 directly to ECMAScript 3, skipping the numbering of 1.5 or 2 for the official specification versions. However, JavaScript 1.5 introduced several features and improvements within the Netscape browser that later influenced or became part of the ECMAScript standards.

Given the confusion around versioning and the specifics of your request, I'll provide information based on the features and fixes that were prominent around the time of JavaScript 1.5 and how they relate to what eventually became standardized in ECMAScript, particularly focusing on ECMAScript 3, where many features became formalized. While I cannot fulfill the request exactly as specified, due to the nature of ECMAScript's version history, I can highlight key concepts introduced around that time.

JavaScript 1.5 introduced several improvements and features that enhanced the language's functionality, making scripting on the web more powerful and flexible. This version included error handling improvements, more robust string manipulation methods, and enhanced array handling capabilities.

JavaScript 1.5 standardized the use of try-catch statements for error handling, allowing developers to catch exceptions and handle them gracefully.

JavaScript: ```javascript try {

 // Attempt to execute code that may fail

 // Handle errors

TypeScript: TypeScript supports try-catch with the added benefit of type annotations for error objects.

Java: Java has a similar try-catch mechanism, with the addition of finally blocks for cleanup.

Python: Python uses try-except blocks, providing a similar mechanism for handling exceptions.

New string methods were introduced, such as `trim()`, enhancing the ability to manipulate and process string data.

JavaScript: ```javascript var str = “ Hello World! ”; console.log(str.trim()); // Outputs: “Hello World!” ```

TypeScript: TypeScript, being a superset of JavaScript, inherits all string methods from JavaScript, including `trim()`.

Java: Java's String class has a `trim()` method that performs a similar function.

Python: Python's string type has a `strip()` method, which is equivalent to JavaScript's `trim()`.

JavaScript 1.5 introduced methods for arrays like `Array.push()` and `Array.pop()`, making it easier to work with arrays as stacks.

JavaScript: ```javascript var arr = [1, 2, 3]; arr.push(4); // arr becomes [1, 2, 3, 4] arr.pop(); // Removes the last element, arr becomes [1, 2, 3] ```

TypeScript: TypeScript inherits JavaScript's array methods, providing strong typing for array operations.

Java: Java uses `ArrayList` for similar functionality, with methods like `add()` and `remove()`.

Python: Python lists offer `append()` and `pop()` methods, providing similar stack-like behavior.

Regular expressions were enhanced, providing more powerful tools for pattern matching and text processing.

JavaScript: ```javascript var pattern = /ab+c/; ```

TypeScript: TypeScript supports JavaScript's regular expression syntax, allowing for typed pattern matching.

Java: Java's `Pattern` class in the `java.util.regex` package provides similar regular expression capabilities.

Python: Python's `re` module provides a rich set of functions and classes for working with regular expressions.

While ECMAScript 1.5 as a formal version doesn't exist within the ECMA standards, the features and improvements around the time of JavaScript 1.5 significantly influenced the development of the language. These features laid the groundwork for what would become standardized in ECMAScript 3 and beyond, showcasing the evolution of JavaScript into a more robust and feature-rich language.

For further reading and official documentation on ECMAScript, you can visit [ECMA International's official website](https://www.ecma-international.org/publications-and-standards/standards/ecma-262/) and the [Mozilla Developer Network (MDN)](https://developer.mozilla.org/en-US/docs/Web/JavaScript) for a comprehensive guide to JavaScript features and standards. The Wikipedia page for [ECMAScript](https://en.wikipedia.org/wiki/ECMAScript) provides a historical overview and context for the development and standardization of JavaScript.