replace去除空格

执行redis 命令的时候会默认用 空格  分割命令，所以当value 中存在空格，就会导致命令执行错误。于是，我想到了用replace函数去除空格，发现了几个注意事项：

1. 单引号里面必须有值，替换空字符用'\0'，也可以达到移除的效果
2. replace函数是直接修改入参的！所以必须保证入参不是常量

/usr/include/c++/4.8.2/bits/stl_algo.h: In instantiation of ‘void std::replace(_FIter, _FIter, const _Tp&, const _Tp&) [with _FIter = __gnu_cxx::__normal_iterator<const char*, std::basic_string<char> >; _Tp = char]’:
OrderPool.cpp:226:85: required from here
/usr/include/c++/4.8.2/bits/stl_algo.h:4998:13: error: assignment of read-only location ‘__first.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator*<const char*, std::basic_string<char> >()’
*__first = __new_value;

 

 

 

来源：https://www.cnblogs.com/lthuang/p/11862837.html