Description Usage Arguments Value Examples
isDateString Check if a string a Date format string.
1 | isDateString(x)
|
x |
A string should be a date like "2017-01-01". |
If x is a date stirng, True; else False.
1 2 3 4 | isDateString("2017-01-01")
## [1] True
isDateString("20170101")
## [1] FALSE
|
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