Zig 0.17.0-dev (Split by item)

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collapseRepeatsLen

Collapse consecutive duplicate elements into one entry.

mem.collapseRepeatsLen

pub fn collapseRepeatsLen(comptime T: type, slice: []T, elem: T) usize

File

lib/std/mem.zig:4125

Code

pub fn collapseRepeatsLen(comptime T: type, slice: []T, elem: T) usize {
    if (slice.len == 0) return 0;
    var write_idx: usize = 1;
    var read_idx: usize = 1;
    while (read_idx < slice.len) : (read_idx += 1) {
        if (slice[read_idx - 1] != elem or slice[read_idx] != elem) {
            slice[write_idx] = slice[read_idx];
            write_idx += 1;
        }
    }
    return write_idx;
}