Sets

Unlike many other languages, OneScript supports the ability to store, combine and test options that may represent options selected by recipient of a survey. The Set type takes the following basic form:

{ident[,ident]}

For example:

{a,b,c}

Sets do not support whitespace between the ident values.

It is possible to combine sets for example:

Set e1 = {a,b,c};
Set e2 = {g,h,i};
e1 = e1 + {d};                // Result is {a,b,c,d}
e1 = e1 - {a};                // Result is {b,c,d}
e1 = e1 + e2;                 // Result is {b,c,g,h,i}

It is also possible to test whether a Set is present in a value is:

Set e1 = {a,b,c};
Set e2 = e1 & {a};            // Result is {a}
e2 = e1 & {h};                // Result {}
e2 = e1 | {h};                // Result is {a,h}

Sets are case insensitive:

Set e1 = {A,b,c};
Set e2 = {g,h,i};
e1 = e1 + {D};                // Result is {a,b,c,D}
e1 = e1 - {a};                // Result is {b,c,d}
e1 = e1 + e2;                 // Result is {b,c,g,h,i}