JavaScript filter() method in 6 minutes! 🚰 

// filter() = creates a new array by filtering out // elements with a callback // ----------- EXAMPLE 1 ----------- let numbers = [1, 2, 3, 4, 5, 6, 7]; let evenNums = numbers.filter(isEven); let oddNums = numbers.filter(isOdd); console.log(oddNums); function isEven(element){ return element % 2 === 0; } function isOdd(element){ return element % 2 !== 0; } // ----------- EXAMPLE 2 ----------- let ages = [16, 17, 17, 18, 19, 20, 65]; let adults = ages.filter(isAdult); let children = ages.filter(isChild); console.log(children); function isAdult(element){ return element >= 18; } function isChild(element){ return element < 18; } // ----------- EXAMPLE 3 ----------- const words = ['apple', 'orange', 'kiwi', 'banana', 'pomegranate', 'coconut',]; const longWords = words.filter(getLongWords); const shortWords = words.filter(getShortWords); console.log(shortWords); function getShortWords(element){ return element.length 6; }

I'm learning Python with your videos. The best material I could find so far. Thank you, bro.

You made the code structure easier for me. Thank you so much brother❤

One bad thing about JS is that it works when there is errors and it don't caught errors like python or ... and shows unexpected behavior due to these errors , I wonder if there is any linter for this kind of situation . but believe me it got 30 minutes to find that i had a typo in element.lenght and I did not see it . end everything work like there is nothing but with a bug

it cool, thanks !😉

I use expressions element % 2 for odd or return !( element % 2) , are these expressions are equal like == or strictly === 0 when we don't mention them ??

thank you

Please create small small project in js

One thing about JS that has been a bit confusing is as in your example about isEven function even thoufh it takes a parameter when you define it, when you use it in the .filter method you dont pass an argument in it. Why is that? I have just always taken it for granted but im genuinely curious why it works that way