To compact data by combining parts of the data, for example, to transform a two-word alphabetic key into a one-word numeric key by adding the numeric equivalents of the letters.

 
       
  • 通过将数据的某些部分进行组合来压缩数据,例如,通过将一些字母的数字等值相加,可把两个字长的字母键词变换为一个字长的数字键词。
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