[英]Android rhino calculation strange behavior
I'm using this project ( https://github.com/APISENSE/rhino-android ) to make calculations in my Android app. 我正在使用这个项目( https://github.com/APISENSE/rhino-android )在我的Android应用程序中进行计算。
However, some numbers starting with 0 in the expression causes a strange behavior in the calculation. 但是,表达式中以0开头的某些数字会导致计算中出现奇怪的行为。 For example:
例如:
Other examples that looks ok: 其他看起来不错的例子:
Code sample: 代码示例:
String expression = "016+2";
ScriptEngine engine = new ScriptEngineManager().getEngineByName("rhino");
double result = (double) engine.eval(expression);
Any ideas? 有任何想法吗?
In JavaScript, putting a 0 in front of an integer will cast it to octal, as well as 0x will cast it as hexadecimal and 0b as binary. 在JavaScript中,将0放在整数前面会将其转换为八进制,以及0x将其转换为十六进制,0b转换为二进制。
This behavior does not take place if there is an 8 or a 9 in your integer since the cast to octal is impossible in this case. 如果整数中有8或9,则不会发生此行为,因为在这种情况下,转换为八进制是不可能的。
So the behavior here seems completely normal for JavaScript. 所以这里的行为似乎完全正常的JavaScript。 So I need to treat my expression to avoid this.
所以我需要对待我的表达来避免这种情况。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.