I Tried and Loved: 7 Javascript tricks

These are my notes for this video

1. Removing Falsy Values from an Array:

   • Use the filter method with a callback function that returns Boolean(name) to remove falsy values.

    const filteredName = myName.filter(name => Boolean(name));

1. Checking for Even Numbers in an Array:

   • Use the some method to check if at least one element in the array passes a test.

    const hasEvens = array.some(num => num % 2 === 0);

1. Removing Duplicate Items from an Array:

   • Use a Set to automatically remove duplicate items and spread the set into a new array.

    const uniqueArray = [...new Set(array)];

1. Using Nullish Coalescing Operator for Default Values:

   • Instead of using a ternary operator, use the nullish coalescing operator (??) to provide a default value for null or undefined.

    const greeting = name ?? "friend";

1. Simplifying Sort Order in Array Sorting:

   • Use a and z as variables instead of a and b when sorting in ascending order, and use z and a for descending order.

    array.sort((a, z) => a - z); // ascending order
    array.sort((z, a) => a - z); // descending order

1. Destructuring Arrays and Objects:

   • Use destructuring assignment to assign variables from arrays or objects.

    const [first, middle, last] = myName;
    const { name, username, age } = person;

1. Creating Arrays of a Specific Length and Filling with Values:

   • Use the Array.from method with a mapping function to create an array of a specific length filled with arbitrary values.

    const newArray = Array.from({ length: n }, (_, index) => index);