Per-vector version counter. — vector_version

Returns the monotonic counter for the name vector on axis. Mirrors Julia DAF: incremented every time set_vector is called (NOT on delete_vector). Returns 0L if the vector has never been set.

Usage

vector_version_counter(daf, axis, name)

Arguments

daf: A DafReader.
axis: Axis name (character scalar).
name: Vector name (character scalar).

Value

integer(1).

Examples

# Mirrors readers.jl jldoctest at line 566.
m <- example_metacells_daf()
vector_version_counter(m, "type", "color")                       # 1L
#> [1] 1
set_vector(m, "type", "color", as.character(1:4), overwrite = TRUE)
vector_version_counter(m, "type", "color")                       # 2L
#> [1] 2