using map build array from big array
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var tasks = [
{
'id' : '001',
'name' : 'Write for Envato Tuts+',
'duration' : 120
},
{
'id' : '002',
'name' : 'Work out',
},
{
'id' : '003',
'name' : 'Procrastinate on Duolingo',
'duration' : 240
}
];
console.log("-- Daftar Task --");
console.log(tasks);
console.log("\n");
var task_names = tasks.map(function (task, index, array) {
return task.name;
});
console.log("using map");
console.log(task_names);
console.log("\n");
var fildata = tasks.filter(function(task){
return task.duration == 120;
});
console.log("using filter");
console.log(fildata);
console.log("\n");
// sort duration and sum it number
var total = tasks.map(function (task, index, array) {
if(typeof task.duration !== 'undefined') {
return task.duration;
}else{
return 0;
}
}).reduce(function (a,b) {
return a+b;
});
console.log("using reduce");
console.log("Total duration: "+total);
JavaScript
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