All functions

checkNameSpace()

check namespace

checkUrl()

check if an URL can be reached

historyStack

history stack structure and methods

inc() mult() divi()

In-place operations

msg() spsinfo() spswarn() spserror()

pretty logging message

notFalsy() isFalsy() emptyIsFalse()

Judgement of falsy value

quiet()

Suppress cat, print, message and warning

remove_ANSI()

Remove ANSI color code

simepleStack

A simple stack structure and methods

spsOption()

Get or set SPS options

strUniquefy()

Uniquefy a character vector

timeout()

Run expressions with a timeout limit