- Object.keys()
var a = {a:1, b:2, c:3};
var b = Object.keys(a); //["a", "b", "c"] - Object.values()
var a = {a:1, b:2, c:3};
var b = Object.values(a); //[1, 2, 3] - [].map()
var a = [1, 2, 3, 4, 5, 6];
var b = a.map(function (item) {
return item + 10;
}); //[11, 12, 13, 14, 15, 16] - [].filter()
var a = [1, 2, 3, 4, 5, 6];
var b = a.filter(function (item) {
if (item % 2 === 1) {
return true;
}
}); // [1, 3, 5]
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