dataTypes.md

Type conversions

To/ From	String	Number	Boolean	null	undefined	Object
String - String(value) Number.toString([type]) eg 255 .toString(2)// 11111111	string			“null”
Number- Number(value) +,Number - cannot read non-int alert( +"100px" ); // NaN parseInt(val)/parseFloat(val) - reads int until it can't alert( parseInt('100px') ); // 100	The string with spaces removed from both sides, Empty string - 0, Error - NaN	Number	1/0	0	NaN
Boolean - Boolean(value)	“” - False Others - true	0 - false Others - true	true/false	false	false

Common functionalities

Operation	Example
Filter out vowels and consonants in string and print in new line	function vowelsAndConsonants(s) { let vowels=[]; let consonants=[]; for(let char of s){ // loop through each char of string if(['a','e','i','o','u'].includes(char.toLowerCase())) // if elt is one of arr vowels.push(char); // add to array else consonants.push(char); } console.log(vowels.join("\n")); // print each arry elt in new line console.log(consonants.join("\n")); }
String reversal	console.log(s.split("").reverse().join(""));