shinyprintf: Shiny "printf" style tracing for debugging purposes
In strboul/mmy: Custom miscellaneous R functions

Description Usage Arguments Details References Examples

Put it inside the shiny::observe in case of reactive values are run. Timestamp displaying date and time is prepended to log messages. Other than debugging purposes, it can also be used as a logger when re-directed to a file. However, the performance is not tested.

1	shinyprintf(x, text = NULL, con = "stdout")

`x`	variable (static or reactive). See Details.
`text`	character. (optional) description added to the variable name. if empty, the default value is `NULL` therefore only the variable name will be used.
`con`	character. Pipe connection. The options are `stdout`, `stderr` or an absolute or a relative path. Default is `stdout`.

Recommended to add the following snippet as shinyprinf: observe(mmy::shinyprintf(${1:var}, text = NULL)).

See Shiny's Reactivity to understand what a "reactive variable" is.

https://shiny.rstudio.com/articles/debugging.html

## Not run: 
x <- 1L
shinyprintf(x, "test")
## Persistent logging to a file:
shinyprintf("test", con = file.path(getwd(), "file.log"))

## End(Not run)