R version 4.5.0 RC (2025-04-03 r88103 ucrt) -- "How About a Twenty-Six"
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Platform: x86_64-w64-mingw32/x64

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> library(RJSONIO)
> x = "[1, 3, 10, 19]"
> fromJSON(I(x))
[1]  1  3 10 19
> 
> h = RJSONIO:::basicJSONHandler()
> fromJSON(x, h$update)
NULL
> 
> if(!(fromJSON(I("[3.1415]")) == 3.1415))
+   stop("Failed for doubles")
> 
> 
> # From couchdb
> 
> x = '{"total_rows":3,"offset":0,"rows":[{"id":"abc","key":"xyz","value":{"rev":"1-3980939464"}},{"id":"x123","key":"x123","value":{"rev":"1-1794908527"}}]}\n'
> 
> fromJSON(x)
$total_rows
[1] 3

$offset
[1] 0

$rows
$rows[[1]]
$rows[[1]]$id
[1] "abc"

$rows[[1]]$key
[1] "xyz"

$rows[[1]]$value
           rev 
"1-3980939464" 


$rows[[2]]
$rows[[2]]$id
[1] "x123"

$rows[[2]]$key
[1] "x123"

$rows[[2]]$value
           rev 
"1-1794908527" 



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> proc.time()
   user  system elapsed 
   0.15    0.03    0.17