Emoji as a variable in js All In One

Math masters….where are you?!

If ?? + ?? = 20
and ?? + ?? = 16
and ?? - ?? = 4
then, ?? + ?? = _____

solutions

(?? + ??) - (?? - ??) => (?? + ??) => (?? + ??)
// 16 - 4 = 12

const ??  = 10;
const ??  = 6;
const ??  = 2;


??  + ??  = 20 => 2 * ??  = 20
// 20 / 2 = 10

??  + ??  = 16 => ??  = 16 - ?? 
// 16 - 10 = 6

??  - ??  = 4 => ??  = ??  - 4
// 6 - 4 = 2

unicode & emoji

Unicode ok ?

const WTF = '什么鬼 ??';
WTF;
// '什么鬼 ??'

const 什么鬼 = 'WTF ??';
什么鬼;
// 'WTF ??'

emoji error ?

const ??  = 'emoji ghost';
// ?  Uncaught SyntaxError: Invalid or unexpected token

Unicode 8 ?

Unicode 16 ?

While ES6 brings stronger Unicode support to our beloved language, not all symbols can be used as valid identifiers. We can use things like var ?_? = 42, but not var ?? = 43.

虽然 ES6 为我们钟爱的语言带来了更强大的 Unicode 支持，但并非所有符号都可以用作有效标识符。我们可以使用 var ?_? = 42 之类的东西，但不能使用 var ?? = 43。

String.?? || !function() {
    var ?? = function() {
        try {
            var ?? = {}, ?? = Object.defineProperty, ?? = ??(??, ??, ??) && ??;
        } catch (??) {}
        return ??;
    }(), ?? = String.fromCharCode, ?? = Math.floor, ?? = function(??) {
        var ??, ??, ?? = 16384, ?? = [], ?? = -1, ?? = arguments.length;
        if (!??) return "";
        for (var ?? = ""; ++?? < ??; ) {
            var ?? = Number(arguments[??]);
            if (!isFinite(??) || 0 > ?? || ?? > 1114111 || ??(??) != ??) throw RangeError("Invalid code point: " + ??);
            65535 >= ?? ? ??.push(??) : (?? -= 65536, ?? = (?? >> 10) + 55296, ?? = ?? % 1024 + 56320, 
            ??.push(??, ??)), (?? + 1 == ?? || ??.length > ??) && (?? += ??.apply(null, ??), 
            ??.length = 0);
        }
        return ??;
    };
    ?? ? ??(String, "fromCodePoint", {
        "??": ??,
        "??": !0,
        "??": !0
    }) : String.?? = ??;
}();

https://github.com/danthareja/emojify

refs

https://twitter.com/Kahoot/status/1511366554964815875

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