Question

I want to loop through an object and run all functions called init().

I have the following code but it is repetitive. How do I effectively make MC and Su instances of a variable?

Here is the repetitive code.

MC.initAll = function() {
    for ( var key in MC ) {
        if( MC.hasOwnProperty( key ) ) {
            if( MC[key].hasOwnProperty( 'init' ) ) {
                MC[key].init();
            }
        }
    }
    for ( var key in Su ) {
        if( Su.hasOwnProperty( key ) ) {
            if( Su[key].hasOwnProperty( 'init' ) ) {
                Su[key].init();
            }
        }
    }
}

There are many options…

• Put them in an array and then pop them out via a for loop.

• Make them object properties and loop through the object properties.

• Make a function call and pass them in as parameters.

• Use an Object Map per fritz below

Which is best or is there a better way?

Answer 1

Try

var iterate = [MC, Su], l = iterate.length, i, key;
for( i=0; i<l; i++) {
    for( key in iterate[i]) {
        if( iterate[i].hasOwnProperty(key) && iterate[i][key].hasOwnProperty("init")) {
            iterate[i][key].init();
        }
    }
}