网上学习资料一大堆,但如果学到的知识不成体系,遇到问题时只是浅尝辄止,不再深入研究,那么很难做到真正的技术提升。
一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!
char * simplifyPath(char * path){
int namesSize = 0;
int n = strlen(path);
char ** names = split(path, ‘/’, &namesSize);
char ** stack = (char **)malloc(sizeof(char *) * namesSize);
int stackSize = 0;
for (int i = 0; i < namesSize; ++i) {
if (!strcmp(names[i], “…”)) {
if (stackSize > 0) {
–stackSize;
}
} else if (strcmp(names[i], “.”)){
stack[stackSize] = names[i];
++stackSize;
}
}
char \* ans = (char \*)malloc(sizeof(char) \* (n + 1));
int curr = 0;
if (stackSize == 0) {
ans[curr] = '/';
++curr;
} else {
for (int i = 0; i < stackSize; ++i) {
ans[curr] = '/';
++curr;
strcpy(ans + curr, stack[i]);
curr += strlen(stack[i]);
}
}
ans[curr] = '\0';
for (int i = 0; i < namesSize; ++i) {
free(names[i]);
}
free(names);
free(stack);
return ans;
}
**C++**
class Solution {
public:
string simplifyPath(string path) {
auto split = [](const string& s, char delim) -> vector {
vector ans;
string cur;
for (char ch: s) {
if (ch == delim) {
ans.push_back(move(cur));
cur.clear();
}
else {
cur += ch;
}
}
ans.push_back(move(cur));
return ans;
};
vector<string> names = split(path, '/');
vector<string> stack;
for (string& name: names) {
if (name == "..") {
if (!stack.empty()) {
stack.pop\_back();
}
}
else if (!name.empty() && name != ".") {
stack.push\_back(move(name));
}
}
string ans;
if (stack.empty()) {
ans = "/";
}
else {
for (string& name: stack) {
ans += "/" + move(name);
}
}
return ans;
}
};
**C++**
class Solution {
public:
string simplifyPath(string path) {
deque st;
int n = path.size(), i = 0;
while(i < n){
if(i < n && path[i] == ‘/’) i++;
else{
string temp;
while(i < n && path[i] != ‘/’) temp += path[i++];
if(temp == “…” && !st.empty()) st.pop_back();
else if(temp != “…” && temp != “.”) st.push_back(temp);
}
}
string res = “/”;
while(!st.empty()){
res += st.front() + “/”;
st.pop_front();
}
if(res.size() > 1) res.pop_back();
return res;
}
};
**java**
class Solution {
public String simplifyPath(String path) {
String[] names = path.split(“/”);
Deque stack = new ArrayDeque();
for (String name : names) {
if (“…”.equals(name)) {
if (!stack.isEmpty()) {
stack.pollLast();
}
} else if (name.length() > 0 && !“.”.equals(name)) {
stack.offerLast(name);
}
}
StringBuffer ans = new StringBuffer();
if (stack.isEmpty()) {
ans.append(‘/’);
} else {
while (!stack.isEmpty()) {
ans.append(‘/’);
ans.append(stack.pollFirst());
}
}
return ans.toString();
}
}


**网上学习资料一大堆,但如果学到的知识不成体系,遇到问题时只是浅尝辄止,不再深入研究,那么很难做到真正的技术提升。**
**[需要这份系统化的资料的朋友,可以添加戳这里获取](https://bbs.youkuaiyun.com/topics/618658159)**
**一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!**
**[需要这份系统化的资料的朋友,可以添加戳这里获取](https://bbs.youkuaiyun.com/topics/618658159)**
**一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!**