Method: Struct#filter

Defined in:
struct.c

#select {|value| ... } ⇒ Array #select ⇒ Object

With a block given, returns an array of values from self for which the block returns a truthy value:

Customer = Struct.new(:name, :address, :zip)
joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
a = joe.select {|value| value.is_a?(String) }
a # => ["Joe Smith", "123 Maple, Anytown NC"]
a = joe.select {|value| value.is_a?(Integer) }
a # => [12345]

With no block given, returns an Enumerator.

Overloads:

  • #select {|value| ... } ⇒ Array

    Yields:

    • (value)

    Returns:


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# File 'struct.c', line 1346

static VALUE
rb_struct_select(int argc, VALUE *argv, VALUE s)
{
    VALUE result;
    long i;

    rb_check_arity(argc, 0, 0);
    RETURN_SIZED_ENUMERATOR(s, 0, 0, struct_enum_size);
    result = rb_ary_new();
    for (i = 0; i < RSTRUCT_LEN(s); i++) {
        if (RTEST(rb_yield(RSTRUCT_GET(s, i)))) {
            rb_ary_push(result, RSTRUCT_GET(s, i));
        }
    }

    return result;
}