Zig 0.17.0-dev (Split by item)

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count

Returns the number of needles inside the haystack needle.len must be > 0 does not count overlapping needles

mem.count

pub fn count(comptime T: type, haystack: []const T, needle: []const T) usize

File

lib/std/mem.zig:1635

Code

pub fn count(comptime T: type, haystack: []const T, needle: []const T) usize {
    if (needle.len == 1) return countScalar(T, haystack, needle[0]);
    assert(needle.len > 0);
    var i: usize = 0;
    var found: usize = 0;

    while (findPos(T, haystack, i, needle)) |idx| {
        i = idx + needle.len;
        found += 1;
    }

    return found;
}