Wednesday, February 12, 2014

detectIndex: Method

The #detectIndex: method is inconspicuous but something to remember when working with collections:

#( 11 7 4 21 ) detectIndex: #even  




#( 11 7 4 21 ) detectIndex: [:el | el < 5]



There is also a #detectIndex:ifNone: variant:






#( 1 3 5 7 ) detectIndex: #even ifNone: [ self error: 'no even number found' ]



Nice!









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