Yihui Xie 916ad6535a fixes #299: RJSONIO is unable to convert a matrix of 0 row to [], in which case we have to use an empty list() instead ...

toJSON(list(x = matrix(nrow = 0, ncol = 3))) gives '{\n "x":  \n}', which is an invalid JSON expression

2013-12-03 15:03:39 -06:00

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