How to convert an array of key-value tuples into an object

An array of many sub arrays. Converting each sub array into an object:

var arr = [
	['name', 'aaa'],
	['title', 'bbbb'],
	['address', 'cccc'],
	['tel', '123']
]

var obj = {};
arr.forEach(function(data){
    obj[data[0]] = data[1]
});

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