Falsy Bouncer (algorithm)

Topic

True Monkey King!

Deletes all false values in the array.

In JavaScript, false values are false, NULL, 0, "", Undefined, and NaN.

Tips

Boolean Objects

Array.filter ()

Ideas

We can use Boolean() functions for type conversions. If its argument is 0,-0, null, undefined, false, NaN, "", the value of the resulting Boolean object will be false, that is, the "false value" in the title.

Solution Method One

Bouncer (arr) {  //Don ' t show a false ID to this bouncer.  return Arr.filter (function (Boolean (item);});}    

Solution Two

Bouncer (arr) {  //Don ' t show a false ID to this bouncer.  return Arr.filter (Boolean);}   

Test

bouncer([7, "ate", "", false, 9])should return [7, "ate", 9].

bouncer(["a", "b", "c"])Should return ["a", "B", "C"].

bouncer([false, null, 0, NaN, undefined, ""])should return [].

bouncer([1, null, NaN, 2, undefined])should return [1, 2].

Falsy Bouncer (algorithm)