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fnParser_UnCertain ( text ; firstSymbol ; secondSymbol ; SN )

parser

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上海Isaac赵
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Sample input:

fnParser_UnCertain ( "asdlis";"<";">";2 )

Sample output:

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

//从text中，取得第SN个两个符号中间的值，结果为文本
Let ( [
 ~firstPosition = Position ( text;firstSymbol;1;SN )
;~secondPosition = Position ( text;secondSymbol;~firstPosition+1;1 )

;~result = Case ( ~firstPosition = 0 or ~secondPosition = 0 ; "error";
                         Middle ( text;~firstPosition ;~secondPosition - ~firstPosition + 1 )
                         )
];~result
 )

parser

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