Thread#keys

() -> ::Array[::Symbol]

thr.keys → array

static VALUE
rb_thread_keys(VALUE self)
{
    struct rb_id_table *local_storage = rb_thread_ptr(self)->ec->local_storage;
    VALUE ary = rb_ary_new();

    if (local_storage) {
        rb_id_table_foreach(local_storage, thread_keys_i, (void *)ary);
    }
    return ary;
}

Returns an array of the names of the fiber-local variables (as Symbols).

Example

thr = Thread.new do
  Thread.current[:cat] = 'meow'
  Thread.current["dog"] = 'woof'
end
thr.join   #=> #<Thread:0x401b3f10 dead>
thr.keys   #=> [:dog, :cat]

See also #key? #kill #join #name also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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