我有一個里面有哈希的數(shù)組：var variable = [];var a = [  { "type": "type1", "a": "a" },   { "type": "type2", "a": "b"},   { "type": "type1", "a": "c"},  { "type": "type1", "a": "d"},  { "type": "type2", "a": "e"},]我如何能夠遍歷數(shù)組和散列并根據(jù)具有鍵值的數(shù)組和散列來過濾它們并將"type1"其"type"推送到變量以便我得到：var variable = [];var a = [  { "type": "type1", "a": "a" },    { "type": "type1", "a": "c"},  { "type": "type1", "a": "d"},]我試過下面的代碼，它正確地執(zhí)行了過濾器，但輸出是錯誤的：for (var i = 0; i < a.length; i++) {    for (var key in a[i]) {        if (a[i]["type"] == "type1"){          variable.push({            "type": a[i][key]          })        }    }}輸出：{type: "type1"}{type: "a"}{type: "type1"}{type: "c"}{type: "type1"}{type: "d"}