smalltalk: breaking out of a loop..

> if i have an OrderedCollection called people..
>
> if i have a million ordered pairs in there, and i wanna see af any one
> of them (hasTenBucks = true).
>
> i don't want to iterate all of them, i want to stop when i find that
> one hasTenBucks..
>
> so in something like:
>
> people do: [ :person | (person hasTenBucks) ifTrue; [break out of loop] ]
>
> ideas? thanks!
>
> --
> ----
> peace,
> sergio
> photographer, journalist, visionary
>
> http://www.CodingForHire.com
> http://www.coffee-black.com
> http://www.painlessfrugality.com
> http://www.twitter.com/sergio_101
> http://www.facebook.com/sergio101
>

> On 11/07/2010 08:06 PM, Guillermo Polito wrote:
>> #anySatisfy: does not iterate over the entire collection either.  So if
>> you only want to know if there is one that satisfies the condition...
>> this is the message you're looking for.
>>
>> Cheers!
>> Guille
>
> And finally, a generic "trick" for breaking out of loops (not just iterations over collections):
>
> Factor out the loop in a single method, then call it. When you want to break out, just do a normal return!

>
> On Nov 7, 2010, at 5:50 PM, Göran Krampe wrote:
>
>> On 11/07/2010 08:06 PM, Guillermo Polito wrote:
>>> #anySatisfy: does not iterate over the entire collection either.  So if
>>> you only want to know if there is one that satisfies the condition...
>>> this is the message you're looking for.
>>>
>>> Cheers!
>>> Guille
>>
>> And finally, a generic "trick" for breaking out of loops (not just iterations over collections):
>>
>> Factor out the loop in a single method, then call it. When you want to break out, just do a normal return!
>
> This often even makes the code more readable.
>
> But speaking of tricks...
>
> testValueWithExitBreak
>
> | val |
>
> [ :break |
>    1 to: 10 do: [ :i |
> val := i.
> i = 4 ifTrue: [break value].
> ]
> ] valueWithExit.
>
> self assert: val = 4.
>
>
>
> testValueWithExitContinue
>
> | val last |
> val := 0.
>
> 1 to: 10 do: [ :i |
> [ :continue |
> i = 4 ifTrue: [continue value].
> val := val + 1.
> last := i
> ] valueWithExit.
> ].
>
> self assert: val = 9.
> self assert: last = 10.
>
>
> with
>
> BlockClosure>>valueWithExit
>  self value: [ ^nil ]
>
>
>
>
>
>
> --
> Marcus Denker  -- http://www.marcusdenker.de
> INRIA Lille -- Nord Europe. Team RMoD.
>
>

>
> On Nov 7, 2010, at 5:50 PM, Göran Krampe wrote:
>
>> On 11/07/2010 08:06 PM, Guillermo Polito wrote:
>>> #anySatisfy: does not iterate over the entire collection either.  So if
>>> you only want to know if there is one that satisfies the condition...
>>> this is the message you're looking for.
>>>
>>> Cheers!
>>> Guille
>>
>> And finally, a generic "trick" for breaking out of loops (not just iterations over collections):
>>
>> Factor out the loop in a single method, then call it. When you want to break out, just do a normal return!
>
> This often even makes the code more readable.
>
> But speaking of tricks...
>
> testValueWithExitBreak
>
>         | val |
>
>         [ :break |
>             1 to: 10 do: [ :i |
>                         val := i.
>                         i = 4 ifTrue: [break value].
>                 ]
>         ] valueWithExit.
>
>         self assert: val = 4.
>
>
>
> testValueWithExitContinue
>
>         | val last |
>         val := 0.
>
>         1 to: 10 do: [ :i |
>                 [ :continue |
>                         i = 4 ifTrue: [continue value].
>                         val := val + 1.
>                         last := i
>                 ] valueWithExit.
>         ].
>
>         self assert: val = 9.
>         self assert: last = 10.
>
>
> with
>
> BlockClosure>>valueWithExit
>           self value: [ ^nil ]
>
>
>
>
>
>
> --
> Marcus Denker  -- http://www.marcusdenker.de
> INRIA Lille -- Nord Europe. Team RMoD.
>
>
>

> For that matter also see this blog post and the discussion:
> <http://www.lukas-renggli.ch/blog/continue-break>.
>
> Lukas on Mate
>
> On Monday, November 8, 2010, Marcus Denker <[hidden email]> wrote:
>>
>> On Nov 7, 2010, at 5:50 PM, Göran Krampe wrote:
>>
>>> On 11/07/2010 08:06 PM, Guillermo Polito wrote:
>>>> #anySatisfy: does not iterate over the entire collection either.  So if
>>>> you only want to know if there is one that satisfies the condition...
>>>> this is the message you're looking for.
>>>>
>>>> Cheers!
>>>> Guille
>>>
>>> And finally, a generic "trick" for breaking out of loops (not just iterations over collections):
>>>
>>> Factor out the loop in a single method, then call it. When you want to break out, just do a normal return!
>>
>> This often even makes the code more readable.
>>
>> But speaking of tricks...
>>
>> testValueWithExitBreak
>>
>>        | val |
>>
>>        [ :break |
>>            1 to: 10 do: [ :i |
>>                        val := i.
>>                        i = 4 ifTrue: [break value].
>>                ]
>>        ] valueWithExit.
>>
>>        self assert: val = 4.
>>
>>
>>
>> testValueWithExitContinue
>>
>>        | val last |
>>        val := 0.
>>
>>        1 to: 10 do: [ :i |
>>                [ :continue |
>>                        i = 4 ifTrue: [continue value].
>>                        val := val + 1.
>>                        last := i
>>                ] valueWithExit.
>>        ].
>>
>>        self assert: val = 9.
>>        self assert: last = 10.
>>
>>
>> with
>>
>> BlockClosure>>valueWithExit
>>          self value: [ ^nil ]
>>
>>
>>
>>
>>
>>
>> --
>> Marcus Denker  -- http://www.marcusdenker.de
>> INRIA Lille -- Nord Europe. Team RMoD.
>>
>>
>>
>
> --
> Lukas Renggli
> www.lukas-renggli.ch
>