On 4. 4. 2019 13:16, Roelof Wobben wrote:
Hello,
For a challenge of Exercism I need to check if some parenthes and
brackets are balanced.
so for example
() = true
([]) = true
but (]) is not true because the bracket has no opening bracket.
Now I wonder if I can premature end a #do: like this
collection do: [:element | (condition with element) ifFalse: [^false]]
in pseudo code
is this a valid way to end the do ?
Not sure I understand your question properly, but yes, you can do this,
it is called "non-local return" and is a known pattern in Smalltalk.
or is there a better way ?
(collection
detect: [:element | (condition with element) not]
ifNone: [sentinel]) == sentinel ifFalse: [ ^false ]
for example does not force you to employ it, as well as
(collection allSatisfy: [:element | (condition with element)])
ifFalse: [ ^false ]
Roelof
Herby
