Created
May 16, 2011 12:16
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Using Obj-C Blocks from MacRuby with Ruby 1.9.2 Syntax
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# 1 # Processing enumerated arrays using two blocks | |
area = "Europe" | |
timeZoneNames = NSTimeZone.knownTimeZoneNames | |
areaArray = NSMutableArray.arrayWithCapacity 1 | |
areaIndexes = timeZoneNames.indexesOfObjectsWithOptions NSEnumerationConcurrent, | |
passingTest: -> (obj, idx, stop) { | |
tmpStr = obj | |
tmpStr.hasPrefix area | |
} | |
tmpArray = timeZoneNames.objectsAtIndexes areaIndexes | |
tmpArray.enumerateObjectsWithOptions NSEnumerationConcurrent|NSEnumerationReverse, | |
usingBlock: -> (obj, idx, stop) { | |
areaArray << obj.substringFromIndex(area.length+1) | |
# areaArray << obj[area.size+1..obj.size] #ruby | |
} | |
puts "Cities in #{area} time zone: #{areaArray}" | |
# 2 # Using a block to find matching substrings in a string | |
musician = "Beatle" | |
musicDates = NSString.stringWithContentsOfFile "/usr/share/calendar/calendar.music", | |
encoding:NSASCIIStringEncoding, | |
error:nil | |
musicDates.enumerateSubstringsInRange NSMakeRange(0, musicDates.length-1), | |
options:NSStringEnumerationByLines, | |
usingBlock:->(substring, substringRange, enclosingRange, stop) { | |
found = substring.rangeOfString musician | |
puts "#{substring}" if (found.location != NSNotFound) | |
} | |
# 3 # Sorting an array using an NSComparator block | |
stringsArray = ["string 1","String 21","string 12","String 11","String 02","aTRing 1","aTring 1"] | |
comparisonOptions = NSCaseInsensitiveSearch | NSNumericSearch | NSWidthInsensitiveSearch | NSForcedOrderingSearch | |
finderSort = -> (string1, string2) { | |
currentLocale = NSLocale.currentLocale | |
string1Range = NSMakeRange(0, string1.length) | |
string1.compare(string2, options:comparisonOptions, range:string1Range, locale:currentLocale) | |
} | |
puts "finderSort: #{stringsArray.sortedArrayUsingComparator(finderSort)}" |
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