method

with_index

v1_9_1_378 - Show latest stable - Class: Enumerator

with_index()

public

Iterates the given block for each element with an index, which start from 0. If no block is given, returns an enumerator.

static VALUE
enumerator_with_index(VALUE obj)
{
    struct enumerator *e;
    VALUE memo = 0;
    int argc = 0;
    VALUE *argv = 0;

    RETURN_ENUMERATOR(obj, 0, 0);
    e = enumerator_ptr(obj);
    if (e->args) {
        argc = RARRAY_LEN(e->args);
        argv = RARRAY_PTR(e->args);
    }
    return rb_block_call(e->obj, e->meth, argc, argv,
                         enumerator_with_index_i, (VALUE)&memo);
}

1Note

Minor correction to Rubybull's examples?

KimSJ · Mar 5, 2013

Was your first example intended to be: a=[11,22,31,224,44] => [11, 22, 31, 224, 44] a.each.with_index { |val,index| puts "index: #{index} for #{val}" }

with_index

1Note

Minor correction to Rubybull's examples?

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