具有多个操作的三元运算符

时间:2014-09-08 23:28:29

标签: javascript ternary-operator

如果每个案例执行多个操作,我可以使用三元运算符吗?

例如,我可以在这里使用它吗?:

    if (dwelling) {
        dwelling = dwelling[0].nodeValue;      //first operation
        letterDwelling = dwelling[0].toUpperCase(); //second operation
 } else {
        dwelling = "";
        letterDwelling = "";
}

我只使用了这种允许后续操作的语法:

dwelling = dwelling ? dwelling[0].nodeValue : "";

3 个答案:

答案 0 :(得分:2)

为避免使用逗号表示法产生副作用,您可以使用自动调用函数代替可以处理代码的函数:

(foo == bar) ? doSomething() : (function(){
    // here you can write all your code
    // and even return something useful
})();

答案 1 :(得分:1)

虽然为了可读性和可扩展性,我强烈反对它,但你可以:

dwelling ? (dwelling = dwelling[0].nodeValue, letterDwelling=dwelling[0].toUpperCase()) : (dwelling = letterDwelling = "");

答案 2 :(得分:0)

是的,请参阅:Conditional (ternary) Operator

var dwelling = true;
(dwelling) ? (
    dwelling = 'a',      //first operation
    letterDwelling = 'a' //second operation
) : (
    dwelling = 'b',
    letterDwelling = 'b'
);
alert(dwelling);

jsfiddle example