To Binary
JavaScript has two boolean values: true and false. But, it also treats certain values as truthy or falsy. All values are truthy except 0, null, undefined, "", false, and NaN.
We can switch values between true and false using the negation operator !. This conversion also converts the type to boolean.
const a = null; const b = undefined; const c = ""; const d = 0; console.log(typeof a); // object console.log(typeof b); // undefined console.log(typeof c); // string console.log(typeof d); // number const w = !a; const x = !b; const y = !c; const z = !d; console.log(typeof w); // boolean console.log(typeof x); // boolean console.log(typeof y); // boolean console.log(typeof z); // boolean This did change the type to boolean, but it also switched the value. If you need conversion to boolean but stay on the same truthy or falsy side, use !! 🤯
const a = null; const b = undefined; const c = ""; const d = 0; console.log(typeof a); // object console.log(typeof b); // undefined console.log(typeof c); // string console.log(typeof d); // number const w = !!a; const x = !!b; const y = !!c; const z = !!d; console.log(typeof w); // boolean console.log(typeof x); // boolean console.log(typeof y); // boolean console.log(typeof z); // boolean // Let's check if they are all false though and haven't switched to true! console.log(w); // false console.log(x); // false console.log(y); // false console.log(z); // false To String
Use toString() method.
const num = 7; console.log(typeof num); // number const numString = num.toString(); console.log(typeof numString); // string Or use the shortcut by appending to "" 🤯
const num = 7; console.log(typeof num); // number const numString = num + ""; console.log(typeof numString); // string To Number
parseInt() function parses a string and returns an integer. You pass the string as the first parameter and the second parameter is radix. It specifies which numeral system to use: hexadecimal (16), octal (8), or decimal (10).
console.log(parseInt("0xF", 16)); // 15 console.log(parseInt("321", 10)); // 321 Or use the shortcut by adding + operator in front of the string! 🤯
console.log(+"0xF"); // 15 console.log(+"321"); // 321 There are situations where the + operator might be used for concatenation. In that case, use the bitwise NOT operator ~ twice.
console.log(~~"0xF"); // 15 console.log(~~"321"); // 321 
Top comments (2)
Great job writing these.!
Thanks a ton! I appreciate it ♥️