Apply new format to snippets and template
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@ -5,9 +5,9 @@ tags: array,function,intermediate
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Returns the index of the last element for which the provided function returns a truthy value.
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Use `Array.prototype.map()` to map each element to an array with its index and value.
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Use `Array.prototype.filter()` to remove elements for which `fn` returns falsy values, `Array.prototype.pop()` to get the last one.
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`-1` is the default value when not found.
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- Use `Array.prototype.map()` to map each element to an array with its index and value.
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- Use `Array.prototype.filter()` to remove elements for which `fn` returns falsy values, `Array.prototype.pop()` to get the last one.
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- `-1` is the default value when not found.
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```js
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const findLastIndex = (arr, fn) =>
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@ -20,4 +20,4 @@ const findLastIndex = (arr, fn) =>
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```js
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findLastIndex([1, 2, 3, 4], n => n % 2 === 1); // 2 (index of the value 3)
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findLastIndex([1, 2, 3, 4], n => n === 5); // -1 (default value when not found)
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```
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```
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