C++11\u4ee5\u540e\u652f\u6301range-base for
\nES6\u4ee5\u540e\uff0cJavaScript\u5728\u4f7f\u7528for\u7684\u65f6\u5019\u53ef\u4ee5\u8fd9\u4e48\u5199:<\/p>\n
const obj = {\n a:'b',\n b:'c'\n};\n\nfor(let i of obj) {\n console.log(i);\n}\n\/* output:\nb\nc\n*\/\n<\/code><\/pre>\n\u800c\u5728C++\u4e2d \u5219\u5199\u6210:<\/p>\n
vector<int>vec;\nvec.push(1);\nvec.push(2)l\nfor(auto i:vec) {\n cout << i << endl;\n}\n\/* output\n1\n2\n*\/\n<\/code><\/pre>\n\u800c\u6211\u4eec\u5728\u6570\u503c\u8303\u56f4\u7684\u5faa\u73af\u7684\u65f6\u5019\uff0crange-base for\u5c31\u7528\u4e0d\u4e86\u4e86.
\n\u5728Python\u4e2d\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<\/p>\n
for i in range(0,5):\n print i\n<\/code><\/pre>\n\u6765\u5b9e\u73b0\u57fa\u4e8e\u8303\u56f4\u7684range-base for<\/p>\n
\u56e0\u6b64\u4e3a\u4e86\u5728C++\u4e2d\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\uff0c\u6211\u4eec\u53ef\u4ee5\u81ea\u5b9a\u4e49\u4e00\u4e2aclass\u5e76\u5728\u5176\u4e2d\u5c01\u88c5iterator\u6765\u5b9e\u73b0\u3002<\/p>\n
#pragma GCC optimize(\"O3\")\n\n#include <iostream>\n#include <vector>\n#include <cstring>\n#include <algorithm>\n#include <array>\n#include <iterator>\n\nusing namespace std;\n\nclass range {\npublic:\n class iterator {\n friend class range;\n\n public:\n int operator*() const { return i_; }\n\n iterator &operator++() {\n ++i_;\n return *this;\n }\n\n iterator operator++(int) {\n iterator copy(*this);\n ++i_;\n return copy;\n }\n\n bool operator==(const iterator &other) const { return i_ == other.i_; }\n\n bool operator!=(const iterator &other) const { return i_ != other.i_; }\n\n protected:\n iterator(int start) : i_(start) {}\n\n private:\n int i_;\n };\n\n iterator begin() const { return begin_; }\n\n iterator end() const { return end_; }\n\n range(int begin, int end) : begin_(begin), end_(end) {}\n\nprivate:\n iterator begin_;\n iterator end_;\n};\n\ntemplate<typename T>\nclass reverse_iterator_class {\npublic:\n explicit reverse_iterator_class(const T &t) : t(t) {}\n\n typename T::const_reverse_iterator begin() const { return t.rbegin(); }\n\n typename T::const_reverse_iterator end() const { return t.rend(); }\n\nprivate:\n const T &t;\n};\nusing ll = long long;\n\ntemplate<typename T>\nreverse_iterator_class<T> reverse(const T &t) {\n return reverse_iterator_class<T>(t);\n}\n<\/code><\/pre>\n\u4e8e\u662f\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8fd9\u4e48\u7528:<\/p>\n
for(auto i:range(0,5)) {\n cout << i << endl;\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"C++11\u4ee5\u540e\u652f\u6301range-base for ES6\u4ee5\u540e\uff0cJavaScript\u5728\u4f7f\u7528for\u7684\u65f6\u5019\u53ef\u4ee5\u8fd9\u4e48\u5199: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[39,40],"tags":[],"class_list":["post-319","post","type-post","status-publish","format-standard","hentry","category-c","category-40"],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/s8UC2c-319","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/haoyuan.info\/index.php?rest_route=\/wp\/v2\/posts\/319","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/haoyuan.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/haoyuan.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/haoyuan.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haoyuan.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=319"}],"version-history":[{"count":2,"href":"https:\/\/haoyuan.info\/index.php?rest_route=\/wp\/v2\/posts\/319\/revisions"}],"predecessor-version":[{"id":321,"href":"https:\/\/haoyuan.info\/index.php?rest_route=\/wp\/v2\/posts\/319\/revisions\/321"}],"wp:attachment":[{"href":"https:\/\/haoyuan.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haoyuan.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haoyuan.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}