Objective-C语言用谓词过滤数组
示例
NSArray *array = [NSArray arrayWithObjects:@"Nick", @"Ben", @"Adam", @"Melissa", nil];
NSPredicate *aPredicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] 'a'"];
NSArray *beginWithA = [array filteredArrayUsingPredicate:bPredicate];
// beginWithA contains { @"Adam" }.
NSPredicate *ePredicate = [NSPredicate predicateWithFormat:@"SELF contains[c] 'e'"];
[array filterUsingPredicate:ePredicate];
// array now contains { @"Ben", @"Melissa" }更多关于
NSPredicate：
苹果文档：NSPredicate
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