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Utility Functions

Zhengjia Wang

library(dipsaus)

1. Cat strings with levels: DEBUG, INFO, WARNING, ERROR, and FATAL

cat2('Debug passed!', level = 'DEBUG')
#> ✔ Debug passed!

cat2('You are all set.', level = 'INFO')
#> ♥ You are all set.

cat2('Wait a second...', level = 'WARNING')
#> ⚠ Wait a second...

cat2('Ooops', level = 'ERROR')
#> ✖ Ooops

cat2('Bi--Doop---', level = 'FATAL')
#> ✖ Bi--Doop---
#> Error: 
#> ...

Level FATAL will raise errors.

2. parse_svec and deparse_svec

parse_svec converts characters like "7-10,14-15" to numeric vectors

parse_svec("7-10,14-15")
#> [1]  7  8  9 10 14 15

deparse_svec reverse the process

deparse_svec(c(2,5,3,1,7))
#> [1] "1-3,5,7"

Parameter max_lag in deparse_svec changes the threshold of integers collapsed together:

deparse_svec(c(1,2,4,7,11))
#> [1] "1-2,4,7,11"

deparse_svec(c(1,2,4,7,11), max_lag = 2)
#> [1] "1-4,7,11"

deparse_svec(c(1,2,4,7,11), max_lag = 3)
#> [1] "1-7,11"

3. System Information

The goal is to work as an alternative to retrieve system information. For example, R doesn’t provide functions to get memory limits, or CPU chip-set information on Linux or MacOS.

# Total RAM in bytes
get_ram()
#> 17179869184.0 B

# Print-friendly
to_ram_size(get_ram(), 1024)
#> 16.0 GB

# WARNING: $free is the total RAM - R usage, is no the actual free RAM
mem_limit2()
#> $total
#> 17179869184.0 B
#> $free
#> 17120491128.0 B

4. Interactive Questions

askYesNo comes with utils package allows to ask yes/no questions and returns logical value. If cancel is entered, then the function returns NA, if answers other than yes, no or cancel is given, it raise an error. dipsaus::ask_yesno will ask the question again and again until the user actually say yes or no

> ask_yesno('Please answer an yes/no question, ok?')
## ♥ Please answer an yes/no question, ok? (Yes/no): 
> qweee
## ⚠ Please answer Y/yes, N/no, or c to cancel. (Yes/no): 
> ttt
## ⚠ Please answer Y/yes, N/no, or c to cancel. (Yes/no): 
> y
## [1] TRUE

ask_or_default instead of asking a yes/no question, it asks a question with default answer. User don’t have to type the answers if the they accept defaults:

> ask_or_default("What is your password", default = 'I will not tell you!')
## ♥ What is your password
##   [default is ‘I will not tell you!’] 
>
## [1] "I will not tell you!"

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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