From 3705bcc9bc8c726a60c1eaa1d29cd1d240c0268a Mon Sep 17 00:00:00 2001 From: Evgeniy Filatov Date: Thu, 2 Aug 2018 17:57:16 +0300 Subject: added helper function that joins vectors of strings, refactored suggestions formattingi function to use it --- libdevcore/StringUtils.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'libdevcore/StringUtils.h') diff --git a/libdevcore/StringUtils.h b/libdevcore/StringUtils.h index acd93e32..4fb5a748 100644 --- a/libdevcore/StringUtils.h +++ b/libdevcore/StringUtils.h @@ -36,4 +36,43 @@ size_t stringDistance(std::string const& _str1, std::string const& _str2); // Return a string having elements of suggestions as quoted, alternative suggestions. e.g. "a", "b" or "c" std::string quotedAlternativesList(std::vector const& suggestions); +/// Joins collection of strings into one string with separators between, last separator can be different. +/// @param _list collection of strings to join +/// @param _separator defaults to ", " +/// @param _lastSeparator (optional) will be used to separate last two strings instead of _separator +/// @example join(vector{"a", "b", "c"}, "; ", " or ") == "a; b or c" +template +std::string joinHumanReadable +( + T const& _list, + std::string const& _separator = ", ", + std::string const& _lastSeparator = "" +) +{ + auto it = begin(_list); + auto itEnd = end(_list); + + std::string result; + + // append first string + if (it != itEnd) + { + result += *it; + ++it; + } + + for (;it != itEnd; ++it) + { + if ((next(it) == itEnd) && !_lastSeparator.empty()) + result += _lastSeparator; // last iteration + else + result += _separator; + + // append string + result += *it; + } + + return result; +} + } -- cgit v1.2.3