Check if given is CronStartOrBlank.
CronStartOrBlank
isCronStartOrBlank("?"); // trueisCronStartOrBlank("INVALID"); // false
Returns true if is CronStartOrBlank, false otherwise.
true
false
Value to check.
Check if given is
CronStartOrBlank
.Example
Returns
Returns
true
if isCronStartOrBlank
,false
otherwise.