Today I Learned

hashrocket A Hashrocket project

Invert a hash

Hash#invert returns a new Hash object with the each key-value pair inverted:

{first: 1, last: 2}.invert
=> {
  1 => :first,
  2 => :last
}
{first: 1, last: 2}.invert[2]
=> :last
See More #ruby TILs
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