method
rehash
v2_5_5 -
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- Class:
Hash
rehash()public
Rebuilds the hash based on the current hash values for each key. If values of key objects have changed since they were inserted, this method will reindex hsh. If Hash#rehash is called while an iterator is traversing the hash, a RuntimeError will be raised in the iterator.
a = [ "a", "b" ] c = [ "c", "d" ] h = { a => 100, c => 300 } h[a] #=> 100 a[0] = "z" h[a] #=> nil h.rehash #=> {["z", "b"]=>100, ["c", "d"]=>300} h[a] #=> 100