closures.js

var arr = ['f', 'e', 'd']

var lazy = (function(){
    var counter = 0;

    return function(){

        console.log(arr[counter]);

        counter += 1;

    };
    
})();

lazy();
lazy();
lazy();



var arr = ['f', 'e', 'd'];

var lazy = (function(){
    var counter = 0;
    var myInterval;

    return myInterval = setInterval(function(){

        console.log(arr[counter]);

        counter += 1;
        
        if (counter >=  arr.length) {

            clearInterval(myInterval);

        }

    }, 1000);
    
})();



var arr = ['f', 'e', 'd'];

for (var i = 0; i < arr.length; i++) {

    setTimeout(function(i) {
    
        return function() {

            console.log(arr[i]);

        }
    
    }(i), 1000 * i);

}



var lazy = (function() {
    var cache = [];
    var found;

    return function(name){
        
        found = cache.filter(function(val) {

            return val.name == name;

        });

        if (found.length == 0){
            var pushed = cache.push({
                'name': name,
                'counter': 0
            });
            
            found = cache[pushed - 1];
        
        } else {
        
            found = found[0];
        
        }
        
        console.log(found.name[found.counter]);

        found.counter += 1;

        if (!found.name[found.counter]) {

            found.counter = 0;

        }

    }

})();

lazy('fed');
lazy('eri');
lazy('eri');
lazy('eri');
lazy('eri');
lazy('fed');
lazy('fed');