repeat_insert ( a_string ; to_insert ; the_interval )
insert a string every so many positions within another string
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Function definition: (Copy & paste into FileMaker's Edit Custom Function window)
recursive custom function to insert some text at repeated intervals throughout some other text; useful for example to convert a pure hexadecimal MAC address to the conventional notation with colons every two digits, or to break up credit card numbers with spaces every four digits
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