There are many additional built-in array methods, a complete list of which is on the MDN’s Array iteration methods page.
The documentation for each method contains several sections:
- A short definition.
- A block with the correct syntax for using the method.
- A list of parameters the method accepts or requires.
- The return value of the function.
- An extended description.
- Examples of the method’s use.
- Other additional information.
In the instructions below, there are some errors in the code. Use the documentation for a given method to determine the error or fill in a blank to make the code run correctly.
Instructions
In the code editor, there is an array called words. We want to create a new array of interesting words. The first thing we want to do is check if there are words that are fewer than 6 characters long. There is something missing in the words.some() method call. Fix this method so that true is printed to the console.
For more information browse MDN’s documentation on .some() .
The .some() method returned true, which means there are some words in the array that are shorter than six characters. Use the .filter() method to save any words longer than 5 characters to a new variable called interestingWords, declared with const.
We’ve used .filter() in a previous exercise, but, for more information browse MDN’s documentation on .filter() .
In the last line of main.js, there is this code:
Complete the code between the parentheses to check if every element has more than 5 characters.
Make sure to uncomment (delete the // before) the last line of the program before you run the code.
For more information browse MDN’s documentation on .every() .