Removes element from a JSON array at the index idx.
"cannot use erase() with null"
idx >= size()
"array index 17 is out of range"
erase()
[0,1,3,4,5]
g++ -std=c++11 -Isingle_include doc/examples/erase__size_type.cpp -o erase__size_type
Definition at line 18477 of file json.hpp.