General
PromptBeginner5 minmarkdownQuality: 24
- sep = " (default) means any whitespace (spaces
tabs
0
Explore
Find agent skills by outcome
124,608 skills indexed with the new KISS metadata standard.
Showing 24 of 124,608Categories: Data & Insights, General, Openclaw, Coding & Debugging
General
PromptBeginner5 minmarkdownQuality: 24
Non-obvious behaviors
gotchas
0
General
PromptBeginner5 minmarkdownQuality: 24
- `file_test(-d
path)`: TRUE if directory exists.
0
General
PromptBeginner5 minmarkdownQuality: 24
- `file_test(-nt
f1
0
General
PromptBeginner5 minmarkdownQuality: 24
- `file_test(-f
path)`: TRUE if regular file exists.
0
General
PromptBeginner5 minmarkdownQuality: 24
- On some filesystems
ctime is status-change time
0
General
PromptBeginner5 minmarkdownQuality: 28
- `options(contrasts = c(contr.treatment
contr.poly))`: default contrasts for unordered/ordered factors.
0
General
PromptBeginner5 minmarkdownQuality: 28
- list.files(pattern = *.csv) — pattern is a regex
not a glob! Use glob2rx(*.csv) or \\.csv$.
0
General
PromptBeginner5 minmarkdownQuality: 24
- `file.path(a
b
0
General
PromptBeginner5 minmarkdownQuality: 24
- options(warn = n): -1 = ignore warnings
0 = collect (default)
0
General
PromptBeginner5 minmarkdownQuality: 24
- `options(OutDec =
): change decimal separator in output (affects format`
0
General
PromptBeginner5 minmarkdownQuality: 24
- options(digits.secs = n): max decimal digits for seconds in time formatting (0-6
default 0).
0
General
PromptBeginner5 minmarkdownQuality: 24
- system.time(expr) returns user
system
0
General
PromptBeginner5 minmarkdownQuality: 24
- options(digits = n): significant digits for printing (1-22
default 7). Suggestion only.
0
General
PromptBeginner5 minmarkdownQuality: 28
- options(scipen = n): positive biases toward fixed notation
negative toward scientific. Default 0. Applies to print/format/cat but not sprintf.
0
General
PromptBeginner5 minmarkdownQuality: 24
- `as.numeric(diff
units = hours)` to extract numeric value in specific units.
0
General
PromptBeginner5 minmarkdownQuality: 24
- `difftime(time1
time2
0
General
PromptBeginner5 minmarkdownQuality: 24
- Explicit units: secs
mins
0
General
PromptBeginner5 minmarkdownQuality: 24
- POSIXct: seconds since 1970-01-01 UTC (compact
a numeric vector).
0
General
PromptBeginner5 minmarkdownQuality: 28
- difftime arithmetic: subtracting POSIXct objects gives difftime. Units auto-selected (secs
mins
0
General
PromptBeginner5 minmarkdownQuality: 24
- POSIXlt: list with components $sec
$min
0
General
PromptBeginner5 minmarkdownQuality: 24
Non-obvious behaviors
gotchas
0
General
PromptBeginner5 minmarkdownQuality: 24
- `format(date
%Y)` for year
0
General
PromptBeginner5 minmarkdownQuality: 24
- `seq.Date(from
to
0