semi colon
comma
comma2
mixed

function foo(msg, msg2) {
    console.log( msg || 'foo' + msg2 || 'bar');
}

function semi() {
    // with semi colon
    debugger;
    foo(); foo(); foo();
}

function comma() {
    // with space
    debugger;
    foo(), foo(), foo();
}

function comma2() {
    // without space
    debugger;
    foo(),foo(),foo();
}

function mixed() {
    debugger;
    var bar1 = 'bar1', bar2 = 'b2';

    // mix 1
    foo();foo(bar1),foo(bar1,bar2);

    // mix 2
    foo(bar2);foo(bar1),foo();

    // mix 3
    foo(),foo(bar1),foo();

    // mix 4
    foo(),foo(bar1),foo(bar1,bar2);

    // mix 5
    var cha = [foo(),foo(bar1)];
    console.log(cha);

    // mix 6
    var cha2 = [foo,foo];
    cha2[0](),cha2[1]('test'),cha2[0](bar1);
}