I have a data like this:
"[-8.390865416667355, 115.23490905761719],[-8.483238563913513, 115.19783020019531],[-8.504970203442133, 115.40382385253906]"
I want to add character "[" in the first index of my string value and "]" in my last index. But i dont know how to insert the character in the last index of my string value so my string would be appear like this:
"[[-8.390865416667355, 115.23490905761719],[-8.483238563913513, 115.19783020019531],[-8.504970203442133, 115.40382385253906]]"