class NoMethodError - Documentation for Ruby 4.0
Description: class NoMethodError: Raised when a method is called on a receiver which doesn't have it defined and also fails to respond with +method_missing+. hello".
Keywords: ruby,class,NoMethodError

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# class NoMethodError

Raised when a method is called on a receiver which doesn’t have it defined and also fails to respond with `method_missing`.

    "hello".to_ary

raises the exception:

    NoMethodError: undefined method `to_ary' for an instance of String

### Public Class Methods

new(msg=nil, name=nil, args=nil, private=false, receiver: nil) → no_method_error
Source

    static VALUE
    nometh_err_initialize(int argc, VALUE *argv, VALUE self)
    {
        int priv;
        VALUE args, options;
        argc = rb_scan_args(argc, argv, "*:", NULL, &options);
        priv = (argc > 3) && (--argc, RTEST(argv[argc]));
        args = (argc > 2) ? argv[--argc] : Qnil;
        if (!NIL_P(options)) argv[argc++] = options;
        rb_call_super_kw(argc, argv, RB_PASS_CALLED_KEYWORDS);
        return nometh_err_init_attr(self, args, priv);
    }

Construct a `NoMethodError` exception for a method of the given name called with the given arguments. The name may be accessed using the `name` method on the resulting object, and the arguments using the `args` method.

If private argument were passed, it designates method was attempted to call in private context, and can be accessed with `private_call?` method.

receiver argument stores an object whose method was called.

### Public Instance Methods

args → obj
Source

    static VALUE
    nometh_err_args(VALUE self)
    {
        return rb_attr_get(self, id_args);
    }

Return the arguments passed in as the third parameter to the constructor.

private_call? → true or false
Source

    static VALUE
    nometh_err_private_call_p(VALUE self)
    {
        return rb_attr_get(self, id_private_call_p);
    }

Return true if the caused method was called as private.