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2011年7月15日23:34:18效率PK —— 统计字符串中字符出现次数原文见：javascript 统计哪个字符出现的次数最多–修正版var str = "The officials say tougher legislation is needed because some \telecommunications companies in recent years have begun new services and made \system upgrades that create technical obstacles to surveillance. They wan 阅读全文