John Zwinck

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John Zwinck has asked 124 questions and find answers to 939 problems.

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John Zwinck questions

LuaSocket FTP always times out
Rcpp: how to keep files generated by sourceCpp?
GCC 8 fails to compile make_shared<volatile int>()
Pandas: how to add missing columns to a DataFrame when assigning Series as row
Boost Intrusive unordered_set broken in 1.48 with GCC in C++11 mode
Is C scanf() prohibited from checking that integers are in range?
Is GCC miscompiling this code, or is it UB?
rPython installation fails, libpython not in linker paths
Python doctest hangs using ProcessPoolExecutor
Why do std::pair<long, long> and std::tuple<long, long> generate different code [duplicate]

John Zwinck answers

when do we use scope resolution operator before new ( ::new)?
Pythonic way to extract 2D array from list
undefined reference to `__sync_val_compare_and_swap_4' error at compilation, using gcc 4.1.1 and 4.2.0 for Sparc v8 target
Pandas Performance comparison apply vs map
Pure Virtual Function error in factory design pattern
Is it correct to extend the implementation of the member selection operator `->` of iterators on std::vector?
Simplest way to properly search and replace source code
Is there an elegant way to represent a map containing different types in C++?
Good way to detect identical expressions in C++
In c++, is it safe to use std::numeric_limits<double>::max() as a special "flag"?