LeetCode: Reverse Integer (JavaScript)
2015-04-23 20:41
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Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
本地测试通过，代码如下：
Example1: x = 123, return 321
Example2: x = -123, return -321
本地测试通过，代码如下：
var reverse = function(x) {
var res = 0;
while(x){
res = res*10 +x%10;
x = parseInt(x/10); //（由于js是弱类型语言， 要将x转换为整型）
}
return res;
};当测试用例中有溢出的整数时，会报错，在上述代码中加了两行判断是否溢出var reverse = function(x) {
var res = 0;
while(x){
res = res*10 +x%10;
x = parseInt(x/10);
}
if(res> Math.pow(2,31) || -res>Math.pow(2,31)){
res = 0;
}
return res;
};
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