Slice
- array.slice(1,3) extracts a section without changing it.
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Filter Method
- Keeps only the elements that match a condition.
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Reduce Method
- Reduces array to a single value using a function, like a sum.
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ForEach Method
- Runs a function for each element in an array.
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Find Method
- Returns the first item that passes a test.
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Spread Operator
- …array unpacks elements into another array or function.
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Rest Parameter
- Collects multiple inputs into a single array parameter.
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Object
- Objects group related data together, like {name:"Liam", age:14}.
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Object Keys
- Object.keys(obj) returns an array of all keys.
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