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jonvuri/Object-mutating reducer patterns

Created April 16, 2018 19:19
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Object-mutating reducer patterns
{ type: 'CHANGE_NUMBER', payload: 2 }
{ a: 1 } -> { a: 2 }
Object.assign({}, state, { a: 2 })
{ ...state, { a: 2 }}
set(lensProp('a'), 2)(state)
assign('a', 2, state)
merge( state, { a: 2, b: 4 } )
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