filter

var users = [
	{name: 'BY', age: 45},
    {name: 'SJ', age: 26},
    {name: 'ES', age: 27},
    {name: 'YJ', age: 49},
    {name: 'DH', age: 42},
    {name: 'JE', age: 37},
    {name: 'YH', age: 48},
]

function filter(list, predi) {
	var _list = []
	for (let i = 0; i < list.length; i++) {
        if (predi(list[i])) {
        	_list.push(list[i])
        }
    }
	return _list
}

var result = filter(users, function(val) {
	return val.age > 40
})
console.log(result)