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  • enumerator/enumerator.c

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Enumerable

Public Instance Methods

each_cons(n) {...} click to toggle source

Iterates the given block for each array of consecutive <n> elements.

e.g.:

(1..10).each_cons(3) {|a| p a}
# outputs below
[1, 2, 3]
[2, 3, 4]
[3, 4, 5]
[4, 5, 6]
[5, 6, 7]
[6, 7, 8]
[7, 8, 9]
[8, 9, 10]

 
               static VALUE
enum_each_cons(obj, n)
    VALUE obj, n;
{
    long size = NUM2LONG(n);
    NODE *memo;

    if (size <= 0) rb_raise(rb_eArgError, "invalid size");
    memo = rb_node_newnode(NODE_MEMO, rb_ary_new2(size), 0, size);

    rb_iterate(rb_each, obj, each_cons_i, (VALUE)memo);

    return Qnil;
}
each_slice(n) {...} click to toggle source

Iterates the given block for each slice of <n> elements.

e.g.:

(1..10).each_slice(3) {|a| p a}
# outputs below
[1, 2, 3]
[4, 5, 6]
[7, 8, 9]
[10]

 
               static VALUE
enum_each_slice(obj, n)
    VALUE obj, n;
{
    long size = NUM2LONG(n);
    NODE *memo;
    VALUE ary;

    if (size <= 0) rb_raise(rb_eArgError, "invalid slice size");

    memo = rb_node_newnode(NODE_MEMO, rb_ary_new2(size), 0, size);

    rb_iterate(rb_each, obj, each_slice_i, (VALUE)memo);

    ary = memo->u1.value;
    if (RARRAY(ary)->len > 0) rb_yield(ary);

    return Qnil;
}
enum_cons(n) click to toggle source

Returns Enumerable::Enumerator.new(self, :each_cons, n).

 
               static VALUE
enumerator_enum_cons(obj, n)
    VALUE obj, n;
{
    return rb_funcall(rb_cEnumerator, id_new, 3, obj, sym_each_cons, n);
}
enum_slice(n) click to toggle source

Returns Enumerable::Enumerator.new(self, :each_slice, n).

 
               static VALUE
enumerator_enum_slice(obj, n)
    VALUE obj, n;
{
    return rb_funcall(rb_cEnumerator, id_new, 3, obj, sym_each_slice, n);
}
enum_with_index click to toggle source

Returns Enumerable::Enumerator.new(self, :each_with_index).

 
               static VALUE
enumerator_enum_with_index(obj)
    VALUE obj;
{
    return rb_funcall(rb_cEnumerator, id_new, 2, obj, sym_each_with_index);
}