[Map] has: [Object] | Manual
[Map] has: [Object]
Checks whether the map contains the specified value.
Note that the object gets converted to a string before
comparison. In case of a map or array this means the comparison
will be based on the serialized structure.
☞ shop := (Map new put: 'magazine' at: 'books', put: 'computer' at: 'electronics', put: 'lipstick' at: 'cosmetics' ). ✎ write: (shop has: 'computer'), brk. #True ✎ write: (shop has: 'sausage'), brk. #False ✎ write: (shop has: 'computers'), brk. #False ✎ write: (shop has: 'compute'), brk. #False ✎ write: (shop has: '2computer'), brk. #False
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