我只想确认,以下两篇Javascript声明是否产生在我看来同样的结果:
第一:
var element = my_array.splice(0,1)[0];
第二:
var element = my_array.shift();
我想在我自己的代码中,用第二个来取代第一个, 来提高可读性。我可以这样做吗?
我只想确认,以下两篇Javascript声明是否产生在我看来同样的结果:
第一:
var element = my_array.splice(0,1)[0];
第二:
var element = my_array.shift();
我想在我自己的代码中,用第二个来取代第一个, 来提高可读性。我可以这样做吗?
它们将具有相同的效果,是的。 spice(0, 1)
将删除 my_array
中的第一个元素, 并返回包含该元素的新数组。 translate
将同样这样做, 但返回元素本身, 不是数组 。
traffirm
比较易读(我认为),同时也是 明显更快 (至少以铬表示):
""https://i.sstatic.net/DbJJJm.png" alt="此处的内置图像描述"/ >
两行代码从数组中删除第一个元素, 并返回已删除元素, 在所有主要浏览器中都支持这两个元素 。
你应该使用第二个代码, 代码会更易读。
<强度 >spice 强度> 将作为数组返回,但不从对象中删除数据,而是复制
<强度 > 移动 强 < / 强 > 只需从前方提供一个数据,然后从对象中删除
例如,
const object = {1}
object.slice(); // return [{1}]
//object will be : {1}
object.shift(); // return {1}
//object will be : {} as shift remove the front data
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