# Functions
Div 数字转字母.
导出数据到Excel文件.
导入Excel到内存.
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编辑距离 Levenshtein levenshtein() costIns: Defines the cost of insertion.
RandomString 在数字 围内生成num位的随机字符串.
RandomString 在数字、大写字母、小写字母范围内生成num位的随机字符串.
读取word 文件内容.
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读取PDF文件内容.
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字符串相似度 SimilarText similar_text().
将字符串加密成 md5.
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GetStrLength 返回输入的字符串的字数，汉字和中文标点算 1 个字数，英文和其他字符 2 个算 1 个字数，不足 1 个算 1个.
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ToString converts a value to string.