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niw/a.m

Created July 30, 2018 18:09
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a.m
@import Foundation;
int main() {
NSMutableString *s = [[NSMutableString alloc] initWithString:@"🐱"];
[s replaceCharactersInRange:NSMakeRange(1, 1) withString:@"a"];
NSLog(@"%@", [s dataUsingEncoding:NSUTF8StringEncoding]); // nil
return 0;
}
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