Understanding what goes on with 'split()' method

const text = "John is a talented jr. dev. All jr. devs will eventually become software engineers with enough experience.";
const newText = text.split("jr. dev").join("software engineer");

console.log(newText);

split(): The split() method is a string method that takes a separator as an argument and splits the string into an array of substrings based on the separator. In the example, we use "jr. dev" as the separator:

const newText = text.split("jr. dev")
const splittedText = text.split("jr. dev");

After this line of code, splittedText will be an array:

["John is a talented ", ". All ", "s will eventually become software engineers with enough experience."]

Notice how the string is divided into substrings at the positions where "jr. dev" appeared, effectively removing "jr. dev" from the original text.

join(): The join() method is an array method that takes a separator as an argument and concatenates all the elements in the array into a single string, inserting the separator between each element. In the example, we use "software engineer" as the separator:
```
 const newText = splittedText.join("software engineer");
```
After this line of code, newText will be a single string:
```
 "John is a talented software engineer. All software engineers will eventually become software engineers with enough experience."
```
By using split() to create an array of substrings and then join() to combine those substrings with a new separator, we effectively replace all occurrences of "jr. dev" with "software engineer" in the original string.