This function makes it easy to find a version number in an existing set by indexing from another version number. This is particularly useful when you want to know, e.g. what the last development version was before a certain patch version, or what the last minor version was before a certain major version.
search_versions( data, reference, which = length(reference[[1]]), increment = -1 )
| data | Existing version numbers to search |
|---|---|
| reference | The version number to index from - can be given as a character for convenience. |
| which | The version number part to be cycled through - can either
be supplied as a number or one of the part-names as set in
|
| increment | The number iterations to look forwards/backwards - in most cases this will be -1 to look for the previous version. |
A version number
data <- version_number("1.0.0", "1.2.0", "1.2.0.1", "2.0.0") # Find the previous dev version search_versions(data, "2.0.0", "dev")#> <version_number[1]> #> [1] 1.2.0.1# Find the previous patch version search_versions(data, "2.0.0", "patch")#> <version_number[1]> #> [1] 1.2.0# In some cases these will be the same: search_versions(data, "1.2.0", "dev")#> <version_number[1]> #> [1] 1.0.0search_versions(data, "1.2.0", "patch")#> <version_number[1]> #> [1] 1.0.0# If not supplied, the part that gets incremented will be chosen based on # the specificity of the reference number: search_versions(data, "2.0.0.0")#> <version_number[1]> #> [1] 1.2.0.1search_versions(data, "2.0.0")#> <version_number[1]> #> [1] 1.2.0# You can use different increments, but usually this isn't needed search_versions(data, "2.0.0.0", increment = -2)#> <version_number[1]> #> [1] 1.2.0search_versions(data, "1.0.0", increment = 1)#> <version_number[1]> #> [1] 1.2.0