在贾瓦伦,我想写一个功能,确定两种变数是否相同,如扼杀、ger化、 b等。 然而,我不知道如何比较其DATA TYPES的两种变数,而不是在变量内储存的VALUES。
事先感谢你=
在贾瓦伦,我想写一个功能,确定两种变数是否相同,如扼杀、ger化、 b等。 然而,我不知道如何比较其DATA TYPES的两种变数,而不是在变量内储存的VALUES。
事先感谢你=
您可使用typeof。 运营商发现变量的数据类型。 为了测试两种相同类型的变数(不一定相同价值),你可以使用
if(typeof a == typeof b) { /* same type */ }
您可以按照建议使用 类型,但并非完美;阵列和日期均被视为“目标”。
另一种不完善的方法是:
function sameTypes() {
var tp = null, ts = Object.prototype.toString;
if (arguments.length === 0) return true; // or false if you prefer
tp = ts.call(arguments[0]);
for (var i = 1; i < arguments.length; ++i)
if (tp !== ts.call(arguments[i])) return false;
return true;
}
如果把目标原型上的“滚动”功能称作“滚动”功能,则你可以传递两个或两个以上(一个或一个以上)的数值,如果所有这些数值都相同的话,则可以发送<代码>true。 这不是完美的,因为它助长了对物体的排泄,因此,扼杀型常态似乎与强硬主义一样。
您正在查阅。
(a) 使用类型
var test = true,
test2 = "string";
if (typeof(test) === typeof(test2)) {}
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