Problem comparing two arrays

Question

i have a loop in Objective C and i compare two index of the same array but the comparison doesnt work ,there is no compile error. Variable iMinor is always zero and arrayDistancias is not empty:

NSMutableArray *arrayDistancias = [NSMutableArray array];


NSNumber *lat1 = [NSNumber numberWithFloat:39.0025];
NSNumber *lat2 = [NSNumber numberWithFloat:40.2710];
NSNumber *lat3 = [NSNumber numberWithFloat:38.5316];
NSNumber *lat4 = [NSNumber numberWithFloat:27.4529];
NSNumber *lng1 = [NSNumber numberWithFloat:-1.5139];
NSNumber *lng2 = [NSNumber numberWithFloat:-3.4327];
NSNumber *lng3 = [NSNumber numberWithFloat:-7.0029];
NSNumber *lng4 = [NSNumber numberWithFloat:-15.3432];


//for (NSInteger i = 0; i < 40; i++)
[arrayDistancias addObject:[NSNumber numberWithInteger:[self calcularDistancia:latitudaqui :lat1 :longitudaqui :lng1]]];
[arrayDistancias addObject:[NSNumber numberWithInteger:[self calcularDistancia:latitudaqui :lat2 :longitudaqui :lng2]]];
[arrayDistancias addObject:[NSNumber numberWithInteger:[self calcularDistancia:latitudaqui :lat3 :longitudaqui :lng3]]];
[arrayDistancias addObject:[NSNumber numberWithInteger:[self calcularDistancia:latitudaqui :lat4 :longitudaqui :lng4]]];


int iMinor = 0;
for (int i = 0; i < [arrayDistancias count]; i++) {

        if([arrayDistancias objectAtIndex: i] < [arrayDistancias objectAtIndex: iMinor]){
            iMinor = i;
          }              


     }

thanks in advance

EmptyStack · Accepted Answer · 2011-09-09 07:16:52Z

2

[arrayDistances objectAtIndex: i] retuns the NSNumber object, not the integer value. In order to get the integer value use intValue method on the returned object. So, you should compare it like this.

if ([[arrayDistances objectAtIndex: i] intValue] < 
   [[arrayDistances objectAtIndex: iMinor] intValue]) {

answered Sep 9, 2011 at 7:16

EmptyStack

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1 Comment

rckoenes Over a year ago

Just a note in the example float are used, so you could use floatValue to get the float value. Or just use compare method of NSNumber. if ([[arrayDistances objectAtIndex: i] compare:[arrayDistances objectAtIndex: iMinor]] == NSOrderedAscending)

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