How can I display an alert for only the numbers stored in this array? Any help is greatly appreciated.
var clenk = [0, null, 42, undefined, "", true, false, NaN, "", "foo bar"];
var filteredArr = clenk.filter(function(val) {
return !(val === isNaN);
});
alert(filteredArr);
If you're facing issues with the isNaN() function, you can try the following code snippet:
var clenk = [0, null, 42, undefined, "", true, false, NaN, "", "foo bar"];
var filteredArr = clenk.filter(function(val) {
return !isNaN(parseFloat(val));
});
alert(filteredArr);Learn how to use the typeof operator in JavaScript to determine the type of data stored in a variable called val.
var myArr = [0, null, 42, undefined, "", true, false, NaN, "", "foo bar"];
var filteredArray = myArr.filter(function(val) {
return (typeof val === "number" && !isNaN(val));
});
alert(filteredArray);
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