NKid's 預防痴呆筆記本: 5月 2016

標籤： gist , JavaScript

	// Method 1
	typeof date.getMonth === 'function'
	// Method 2
	date instanceof Date
	// Method 3
	Object.prototype.toString.call(date) === '[object Date]'

view raw typeof.js hosted with ❤ by GitHub

標籤： gist , JavaScript

	console.log('好'.charCodeAt()); //22909
	console.log('好'.charCodeAt().toString(16)); //597d
	console.log(String.fromCharCode(22909)); //好
	console.log(String.fromCharCode(0x597d)); //好
	console.log('\u597d'); //好
	console.log('\u{597d}'); //好

	//prototype 擴充類別定義
	//方法1 (Regex)
	String.prototype.toUnicode = function() {
	return this.replace(/./g, function(char) {
	var v = char.charCodeAt(0).toString(16);
	var pad = "0000";
	return (pad.substring(0, pad.length - v.length) + v).toUpperCase();
	});
	};
	console.log('狂'.toUnicode()); //72C2

	//方法2 (while)
	String.prototype.toUnicode = function () {
	return this.replace(/./g, function (char) {
	var v = String.charCodeAt(char).toString(16);
	if (v.length != 4) {
	do {
	v = '0' + v;
	} while (v.length < 4)
	}
	return v;
	});
	};
	console.log('狂'.toUnicode()); //72C2