JavaScript-Basics/21_string_properties_method.js at master · last-endcode/JavaScript-Basics · GitHub

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// String properties and methods
// wrapper string object

lettext='John Doe';
letresult=text;

console.log(result.length);//8
console.log(result[0]);//J
console.log(result[4]);//Blank space
// Lower & upper
console.log(result.toLowerCase());//john doe
console.log(result.toUpperCase());//JOHN DOE
// search target string
console.log(result.includes('ohn'));//true
console.log(result.includes('not'));//false

// startsWith, end with
console.log(result.startsWith('John'));//true
console.log(result.startsWith('john'));//false
console.log(result.endsWith('e'));//true

// change string
console.log(result.replace('John','Peter'));
console.log(result.indexOf('Doe'));// 5
console.log(result.indexOf('oe'));//6
console.log(result.charAt(0));//J
console.log(result.charAt(result.length-1));//e
// trim for remove space
letname=' dncode';
console.log(name);
console.log(name.trim());
console.log(name.trim().toUpperCase().startsWith('DNCODE'));//true
console.log('slice');
name='john jordan';
// slice if 0 is first index
console.log(name);
console.log(name.slice(-1));//n
console.log(name.slice(-2));//an
console.log(name.slice(1));//ohn jordan
console.log(name.slice(0));//john jordan
console.log(name.slice(0,7));//start 0 index, end 7 word..

name='Nakamura Ekuichi';//totally word and space is calculate too
console.log(name.length);
console.log(name.slice(9,name.length));
console.log(name.slice(0,10));//0 is index, and 10 is stopping for last word and the lasts word is E.
// here start -12 mura Ekuichi, and stopp on E for -6
console.log(name.slice(-12,-6));