function sortByFoo(tab)
{
// TODO: Fill in the code here, using Array.sort.
return tab;
}
// Sort by .foo attribute
console.log(sortByFoo(
[{foo: 5}, {foo: 7}, {foo: 4}, {foo: 3}, {foo: 2}, {foo: 1}, {foo: 6}]
)[5].foo === 6);
// Does not crash on an empty array
console.log(sortByFoo([]).length === 0);
// For objects without a `foo` attribute, its value should be considered equal to '0'
console.log(sortByFoo([{foo: 42}, {bar: 7}, {foo: -5}])[1].bar === 7);
要求补充程序,使得在浏览器中显示三次true
------解决方案--------------------
- JScript code
function sortByFoo(tab) { tab.sort(function (t1, t2) { return (t1.foo || 0) - (t2.foo || 0); }); return tab; }
------解决方案--------------------
- JScript code
function sortByFoo(tab){ // TODO: Fill in the code here, using Array.sort. tab.sort(function(elem1, elem2){ var foo1 = elem1.foo || 0, foo2 = elem2.foo || 0; return foo1 > foo2 ? 1 : foo1 === foo2 ? 0 : -1; }); return tab; } // Sort by .foo attribute console.log(sortByFoo( [{foo: 5}, {foo: 7}, {foo: 4}, {foo: 3}, {foo: 2}, {foo: 1}, {foo: 6}] )[5].foo === 6); // Does not crash on an empty array console.log(sortByFoo([]).length === 0); // For objects without a `foo` attribute, its value should be considered equal to '0' console.log(sortByFoo([{foo: 42}, {bar: 7}, {foo: -5}])[1].bar === 7);