<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
What is the purpose of this JavaScript code?
const studentNames = ["John", "Paul", "Ringo", "George"];
let nameString = studentNames.reduce((string, name) => {
    return string + name + ",";
}, 'All students: ');<|im_end|>
<|im_start|>assistant
The purpose of this JavaScript code is to create a comma-separated string from an array of strings. The code uses the reduce function to concatenate the strings in the array with a comma and create a new string beginning with the string 'All students: '. The resulting string is stored in the nameString variable.<|im_end|>
