How to Flatten Nested Objects with a One-Line Solution?

One-Line Solution to Flatten Nested Objects

In the realm of data manipulation, flattening nested objects is a common task. You may need to transform a complex object with multiple levels of nesting into a simpler one with a single level of keys and values. One efficient approach is to utilize a concise one-liner:

Object.assign({}, ...function _flatten(o) { return [].concat(...Object.keys(o).map(k => typeof o[k] === 'object' ? _flatten(o[k]) : ({[k]: o[k]})))}(yourObject))

Let's break down this one-liner:

• The premise is to recursively traverse the object and construct an array of nested one-property objects.
• The Object.assign method is then used to combine these objects into a single flattened object.
• The _flatten function is a recursive helper that descends into nested objects, creating one-property objects based on key-value pairs.
• This process continues until all nested objects have been flattened.

To use this one-liner, simply pass your nested object into the yourObject placeholder. The resulting flattened object will be accessible as the output of the expression.

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