One of the basic list-manipulation functions in the C API to the Tcl C Library. 
Does most of the work for both [linsert] and [lreplace].

Documentaton at http://www.tcl.tk/man/tcl8.5/TclLib/ListObj.htm.

Prototype:

    :   int '''Tcl_ListObjReplace'''(Tcl_Interp *''interp'', Tcl_Obj *''listPtr'', int ''first'', int ''count'', int ''objc'', Tcl_Obj *const ''objv''[[]])

The ''listPtr'' object must not be shared when calling, as this function will modify it.


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