function f(){/* this is a comment. */const x=[1,2,3,4];const y={a:1,b:2,c:3};const z=[[1,2,3],[4,5,6],[7,8,9]];if(x[0]===y.a){return x;}return "none";}
function g(x){switch(x){case 1:return'j';case 2:return's';default:return'';}}
const f=({a,b,c}={a:1,b:2,c:3})=>(a+b+c);

function f(){/* this is a comment. */const x=[1,2,3,4];const y={a:1,b:2,c:3};const z=[[1,2,3],[4,5,6],[7,8,9]];if(x[0]===y.a){return x;}return "none";}
function g(x){switch(x){case 1:return'j';case 2:return's';default:return'';}}
const h=({a,b,c}={a:1,b:2,c:3})=>(a+b+c);

fix syntax error in the example