8 lines
244 B
Markdown
8 lines
244 B
Markdown
### Count occurrences of a value in array
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Use `reduce()` to increment a counter each time you encounter the specific value inside the array.
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```js
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var countOccurrences = (arr, value) => arr.reduce((a, v) => v===value ? a + 1 : a + 0, 0);
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```
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