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Call a function on each element of a List and return a new List instance from the results.
list.map( callback(item, index, listReference), context )
Parameters
- callback
{function(*, Number, can.List)}:A function to call with each element of the list.
- context
{Object}:An optional object to use as
thisinside the callback.
Returns
{can.List}:
A new can.List instance.
var list = new List([1, 10, 100, 1000, 10000, 100000]);
var newList = list.map(function(element, index, listReference) {
var result;
switch(index) {
case 0: {
result = false;
break;
}
case 1: {
result = undefined;
break;
}
case 2: {
result = element;
break;
}
case 3: {
result = element * 5;
break;
}
default: {
result = listReference[index] /= 2;
break;
}
}
return result;
});
console.log(list); // [ 1, 10, 100, 1000, 5000, 50000]
console.log(newList); // [false, undefined, 100, 5000, 5000, 50000]