Some of the typical string-related checks would validate whether an empty string has 0 length, accessing out-of-index results in an error message or exception, and so on.

与字符串相关的一些典型的检查，会验证空字符串的长度是否为 0，访问范围超出索引是否导致错误消息或异常，等等。

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The horizontal cross section of the pyramid is square at any level, with each side measuring 229 m (751 ft) in length. The maximum error between side lengths is astonishingly less than 0.1%.

金字塔的水平剖面在任何高度都是正方形，每面的长度也都是229米(751英尺)，惊人地是，其最大的误差小于0.1%。

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Since we implement no metadata service in this example, the method returns an array with length 0 (returning null would have indicated an error).

由于我们在这一示例中没有实现任何元数据服务，所以该方法返回一个长度为0的数组(返回null将表明有错误)。

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