Enumerable#take

take(n) → array

static VALUE
enum_take(VALUE obj, VALUE n)
{
    struct MEMO *memo;
    VALUE result;
    long len = NUM2LONG(n);

    if (len < 0) {
        rb_raise(rb_eArgError, "attempt to take negative size");
    }

    if (len == 0) return rb_ary_new2(0);
    result = rb_ary_new2(len);
    memo = MEMO_NEW(result, 0, len);
    rb_block_call(obj, id_each, 0, 0, take_i, (VALUE)memo);
    return result;
}

For non-negative integer n, returns the first n elements:

Example

r = (1..4)
r.take(2) # => [1, 2]
r.take(0) # => []

h = {foo: 0, bar: 1, baz: 2, bat: 3}
h.take(2) # => [[:foo, 0], [:bar, 1]]

See also #sum #take_while #sort_by #tally also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0

‹ prev#sum next ›#take_while