[self.frenchCoinArray enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if ([[obj objectForKey:@"unit"]isEqualToString:@"USDT"]) {
dic = obj;
index = idx;
}
}];
[self.frenchCoinArray removeObjectAtIndex:index];
[self.frenchCoinArray insertObject:dic atIndex:0];
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