2.3 KiB
2.3 KiB
id | title | localeTitle | isRequired | challengeType |
---|---|---|---|---|
adf08ec01beb4f99fc7a68f2 | Falsy Bouncer | Falsy Bouncer | true | 5 |
Description
false
en JavaScript son false
, null
, 0
, ""
, undefined
y NaN
.
Sugerencia: intente convertir cada valor a un booleano.
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Instructions
Tests
tests:
- text: ' <code>bouncer([7, "ate", "", false, 9])</code> debe devolver <code>[7, "ate", 9]</code> .'
testString: 'assert.deepEqual(bouncer([7, "ate", "", false, 9]), [7, "ate", 9], "<code>bouncer([7, "ate", "", false, 9])</code> should return <code>[7, "ate", 9]</code>.");'
- text: ' <code>bouncer(["a", "b", "c"])</code> debe devolver <code>["a", "b", "c"]</code> .'
testString: 'assert.deepEqual(bouncer(["a", "b", "c"]), ["a", "b", "c"], "<code>bouncer(["a", "b", "c"])</code> should return <code>["a", "b", "c"]</code>.");'
- text: ' <code>bouncer([false, null, 0, NaN, undefined, ""])</code> debe devolver <code>[]</code> .'
testString: 'assert.deepEqual(bouncer([false, null, 0, NaN, undefined, ""]), [], "<code>bouncer([false, null, 0, NaN, undefined, ""])</code> should return <code>[]</code>.");'
- text: ' <code>bouncer([1, null, NaN, 2, undefined])</code> debe devolver <code>[1, 2]</code> .'
testString: 'assert.deepEqual(bouncer([1, null, NaN, 2, undefined]), [1, 2], "<code>bouncer([1, null, NaN, 2, undefined])</code> should return <code>[1, 2]</code>.");'
Challenge Seed
function bouncer(arr) {
// Don't show a false ID to this bouncer.
return arr;
}
bouncer([7, "ate", "", false, 9]);
Solution
function bouncer(arr) {
return arr.filter(e => e);
}
bouncer([7, "ate", "", false, 9]);