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Compact string
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| #include <iostream> | |
| #include <cstring> | |
| // Compactify a string in linear time. | |
| // | |
| // Examples: | |
| // | |
| // $ compact /foo/bar/baz # /f/b/baz | |
| // $ compact foo/bar/baz # f/b/baz | |
| // $ compact baz # baz | |
| int main(int argc, char const* argv[]) { | |
| if (argc < 2) { | |
| return 0; | |
| } | |
| const char* path = argv[1]; | |
| char delim = argc == 3 ? argv[2][0] : '/'; | |
| int n = std::strlen(path); | |
| int m = n; | |
| while (m - 1 >= 0 && path[m - 1] != delim) { | |
| m--; | |
| } | |
| char last; | |
| for (size_t i = 0; i < m; i++) { | |
| char ch = path[i]; | |
| if (i == 0 || last == delim || ch == delim) { | |
| std::cout << ch; | |
| } | |
| last = ch; | |
| } | |
| for (size_t i = m; i < n; i++) { | |
| std::cout << path[i]; | |
| } | |
| std::cout.flush(); | |
| } |
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