是否有可以缩短条件语句之类的if语句的语法？

Question

I want to write this code more short:

var fn = function (a) {
    if (a) {
        somefn.call(null, a);
    }
};

Using arrow statement, it will be:

var fn = (a) => { if (a) somefn.call(null, a); };

I want more short code, if using conditional operator:

var fn = (a) => a ? somefn.call(null, a) : null;// null is dummy code

It is not beautiful. Is there any syntax like this?:

var fn = (a) => a ? somefn.call(null, a);

thanks.

Answer 1

如果a为真，则可以使用逻辑AND && ，它检查a并调用该函数。

var fn = a => a && somefn.call(null, a);

Answer 2

Your original code is short enough, "beautiful", and hopefully do what you want.

You can write something like this. But this is not better code, uglier, hard to understand...

var fn = a ? function( a ) { somefn.call(null, a) ; } : function( ) { };