测试字符串中是否所有字符都不是字母数字

Question

下面的字符串可能是错误API调用的结果：

_±êµÂ’¥÷“_¡“__‘_Ó ’¥Ï“ùü’ÄÛ“_« “_Ô“Ü“ù÷ “Ïã“_÷’¥Ï “µÏ“ÄÅ“ù÷ “Á¡ê±«“ùã ê¡Û“_ã “__’

我不确定哪些行包含非字母数字字符，我的任务是确定哪些行有问题。

另一个问题是，一些非字母数字字符与我仍希望保留和搜索的字符串一起出现，例如：

This sentence is fine and searchable, but a few non-alphanumeric äóî donäó»t popup

是否有一种方法可以测试字符串的全部内容是否是非字母数字的？

Answer 1

可以使用正则表达式查找仅包含标准字母和数字字符(包括逗号、句点、感叹号和问号以及空格)的所有行：

clear
input str168 var1
"_±êµÂ’¥÷“_¡“__‘_Ó ’¥Ï“ùü’ÄÛ“_« “_Ô“Ü“ù÷ “Ïã“_÷’¥Ï “µÏ“ÄÅ“ù÷ “Á¡ê±«“ùã ê¡Û“_ã “__’"
"This sentence is fine and searchable, but a few non unicode äóî donäó»t popup"                                                                                     
" This is a regular sentence of course"                                                                                                                                   
" another sentence, but with comma"                                                                                                                                       
" but what happens with question marks?"                                                                                                                                  
" or perhaps an exclamation mark!"                                                                                                                                       
end

generate tag = ustrregexm(var1, "^[A-Za-z0-9 ,.?!]*$")

. list tag, separator(0)

     +-----+
     | tag |
     |-----|
  1. |   0 |
  2. |   0 |
  3. |   1 |
  4. |   1 |
  5. |   1 |
  6. |   1 |
     +-----+

另一种可能是使用正则表达式来排除没有任何字母和数字字符的任何行，在这种情况下，这种解决方案涵盖了两种必需的情况：

clear
input str168 var1
"_±êµÂ’¥÷“_¡“__‘_Ó ’¥Ï“ùü’ÄÛ“_« “_Ô“Ü“ù÷ “Ïã“_÷’¥Ï “µÏ“ÄÅ“ù÷ “Á¡ê±«“ùã ê¡Û“_ã “__’"
"This sentence is fine and searchable, but a few non unicode äóî donäó»t popup"                                                                                     
" This is a regular sentence of course"                                                                                                                                   
" another sentence, but with comma"                                                                                                                                       
" but what happens with question marks?"                                                                                                                                  
" or perhaps an exclamantion mark!"                                                                                                                                       
"¥Ï“ùü’ÄÛ“_« “_Ô“Ü“ù÷ "                                                                                                                          
"¥Ï“ùü’ÄÛ hihuo"                                                                                                                                                
end

generate tag = ustrregexm(var1, "^[^A-Za-z0-9]*$")

list tag, separator(0)

     +-----+
     | tag |
     |-----|
  1. |   1 |
  2. |   0 |
  3. |   0 |
  4. |   0 |
  5. |   0 |
  6. |   0 |
  7. |   1 |
  8. |   0 |
     +-----+