Update flatten helper without recursion #5454
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Connormiha
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src/helpers.coffee
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| if '[object Array]' is Object::toString.call element | ||
| stack.push(element) | ||
| else | ||
| flattened.push(element) |
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Perhaps instead we should use https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat? I don’t think we even need to feature-detect it, support goes very far back.
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Yes, we can use this if old browser/Node.js support is not required.
exports.flatten = flatten = (array) ->
array.flat(10)10 - is max depth
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Yes, we can use this if old browser/Node.js support is not required.
You can look in our GitHub Actions to see our support matrix, but basically everywhere we support can run .flat. You can use .flat(Infinity) to go as far down as necessary.
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I changed it and built.
npx cake build
npx cake build:browserThere was a problem hiding this comment.
CI is failing. Try cake release?
I've rewritten the
flattenalgorithm. Instead of a recursive approach, i'm using a stack. This way, we avoid unnecessary function calls and the creation of intermediate arrays.flattenedin each call and new array after eachconcat.In cases of deep recursion or with a large number of arrays, this algorithm is more efficient and generates less work for the garbage collector.