I'm doing a function that extracts all the numbers from one array and stores them in another, but when I get to 0 it does not recognize it as a number, here my code:
function filter_list(l) {
return l.filter(function(e){
if(typeof e == "number") return e;
});
}
Array passed as parameter: [1, 'a', 'b', 0,15] Array returned: [1,15], but it should be: [1, 0, 15]
Thanks and best regards.
You are doing the filter wrong.
The filter function returns a boolean and depending on the returned value it takes or removes the element from the array.
when you return a 0 it is equal to return false or null , as it is in the other cases where you do not return a value.
The correct use of the serial:
function filter_list(l) {
return l.filter(function(e){
return typeof e == "number";
});
}
console.log(
filter_list([1,'a','b',0,15])
); Removing the clause if and returning the boolean directly.