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JSONArray_Shift ( arr ; value )

This will insert a value at the beginning of a given array and shift all of the other array items down.

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Robert D Trammel - Show more from this author https://www.linkedin.com/in/robertdtrammel/

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

//Expects a JSON Array While([ arr = If( IsEmpty( arr ); "[]"; arr ); arrLn = ValueCount( JSONListKeys ( arr; "" ) ); i = 1; output = JSONSetElement( ""; "[0]"; value; "" ) ]; i <= arrLn ;[ thisValue = JSONGetElement( arr; "[" & i - 1 & "]" ); output = JSONSetElement( output; "[" & i & "]"; thisValue; "" ); i = i + 1 ]; output ) Click to copy

This is intended to behave similarly to the native Array.shift method that javascript provides.

 

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