Takes a UI element value and an older value and determines if
it has been modified
Usage
has_updated(ui_val = NULL, old_val = NULL, init_val = NULL)
Arguments
- ui_val
Current value from the UI.
- old_val
Last value of of the element.
defined.
- init_val
List of values to skip. These are values expected to be
assigned on initialization. For buttons it may be 0. For others it may be
"".
Value
Boolean result of the comparison
Examples
changed_true = has_updated(ui_val = "a", old_val = "")
changed_true
#> [1] TRUE
changed_false = has_updated(ui_val = "a", old_val = "a")
changed_false
#> [1] FALSE
