zoukankan      html  css  js  c++  java
  • 动态修改可变数组元素

    1、

    NSMutableArray<NSString *> *array = [NSMutableArray arrayWithObjects:@"1", @"2", @"3", @"4", nil];
        for (NSString *str in array.reverseObjectEnumerator) {
            NSLog(@"%@", str);
            if ([str isEqualToString:@"2"]) {
                [array removeObject:str];
            }
        }

    2、

    NSMutableArray<NSString *> *array = [NSMutableArray arrayWithObjects:@"1", @"2", @"3", @"4", nil];
        [array enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            if ([obj isEqualToString:@"2"]) {
                [array removeObject:obj];
            }
        }];

     参考:

    http://weibo.com/touristdiary?refer_flag=1005055013_&is_all=1#_rnd1468202765617

  • 相关阅读:
    Repeatable Read
    Read Committed
    Read Uncommitted
    sql 事务
    实用sql语句
    管理mysql
    mysql
    sql delete语句
    sql update语句
    sql INSERT语句
  • 原文地址:https://www.cnblogs.com/xiu619544553/p/5659359.html
Copyright © 2011-2022 走看看