一、深拷贝浅拷贝
二、 let和var的区别
三、CSS盒模型 是什么?有哪几种?区别?
四、【算法】有效括号
bool isValid(char* s) {
int len = strlen(s);
char stack[len];
int top = -1;
for (int i = 0; i < len; i++) {
if (s[i] == '(' || s[i] == '[' || s[i] == '{') {
stack[++top] = s[i];
} else {
if (top == -1) {
return false;
}
char topChar = stack[top--];
if ((s[i] == ')' && topChar != '(') || (s[i] == ']' && topChar != '[') || (s[i] == '}' && topChar != '{')) {
return false;
}
}
}
return top == -1;
}