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instance method

Module#const_set

[T] (::interned name, T value) -> T

mod.const_set(sym, obj) → obj

mod.const_set(str, obj) → obj

static VALUE
rb_mod_const_set(VALUE mod, VALUE name, VALUE value)
{
    ID id = id_for_var(mod, name, const);
    if (!id) id = rb_intern_str(name);
    rb_const_set(mod, id, value);

    return value;
}

Sets the named constant to the given object, returning that object. Creates a new constant if no constant with the given name previously existed.

Example

Math.const_set("HIGH_SCHOOL_PI", 22.0/7.0)   #=> 3.14285714285714
Math::HIGH_SCHOOL_PI - Math::PI              #=> 0.00126448926734968

If sym or str is not a valid constant name a NameError will be raised with a warning “wrong constant name”.

Example

Object.const_set('foobar', 42) #=> NameError: wrong constant name foobar

See also #const_missing #const_source_location #const_get #define_method also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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