Print a string which has been intepolated with variables

qqcat(..., envir = parent.frame(), code.pattern = NULL, file = "",
    sep = " ", fill = FALSE, labels = NULL, append = FALSE, cat_prefix = NULL,
    strwrap = qq.options("cat_strwrap"), strwrap_param = list(), sep2 = "")

Arguments

...: text string in which variables are marked with certain rules
envir: environment where to look for those variables
code.pattern: pattern of marks for the variables
file: pass to cat
sep: pass to cat
fill: pass to cat
labels: pass to cat
append: pass to cat
cat_prefix: prefix string. It is prior than qq.options(cat_prefix).
strwrap: whether call strwrap to wrap the string
strwrap_param: parameters sent to strwrap, must be a list
sep2: Separation character when there are multiple templates.

Details

This function is a shortcut of

cat(qq(text, envir, code.pattern), ...)

Additionally, you can add global prefix:

qq.options("cat_prefix" = "[INFO] ")
    qq.options("cat_prefix" = function(x) format(Sys.time(), "[%Y-%m-%d %H:%M:%S] "))
    qq.options("cat_prefix" = NULL)

You can also add local prefix by specifying cat_prefix in qqcat.

qqcat(text, cat_prefix = "[INFO] ")

Please refer to qq to find more details.

Author

Zuguang Gu <z.gu@dkfz.de>

Examples

a = 1
b = "text"
qqcat("a = @{a}, b = '@{b}'\n")
#> a = 1, b = 'text'
qqcat("a = `a`, b = '`b`'\n", code.pattern = "`CODE`")
#> a = 1, b = 'text'

qq.options("cat_prefix" = function(x) format(Sys.time(), "[%Y-%m-%d %H:%M:%S] "))
qqcat("a = @{a}, b = '@{b}'\n")
#> [2022-08-01 13:57:52] a = 1, b = 'text'
Sys.sleep(2)
qqcat("a = @{a}, b = '@{b}'\n")
#> [2022-08-01 13:57:54] a = 1, b = 'text'
qq.options(RESET = TRUE)