What callbackFn is expected to return depends on the array method that was called. Donations to freeCodeCamp go toward our education initiatives, and help pay for servers, services, and staff. "06": "Jun", LOL thanks for enabling my laziness :). Elements can be any kind of JavaScript value even other arrays. This example uses the indexOf() method to find the position (index) of the string "Banana" in the fruits array. Other methods (e.g., push(), splice(), etc.) Do peer-reviewers ignore details in complicated mathematical computations and theorems? We also have thousands of freeCodeCamp study groups around the world. "08": "Aug", To review, open the file in an editor that reveals hidden Unicode characters. How do I include a JavaScript file in another JavaScript file? horrific bear accident. Find centralized, trusted content and collaborate around the technologies you use most. The optional limit parameter is a positive number that tells the computer how many substrings should be in the returned array value. When using the Date object it will work correctly, but if using it as a standalone function it considers the months in human readable format from 1-12. This is explained further on the Array/length page. Returns true if every element in the calling array satisfies the testing function.
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