标签:str UNC array string var target color === obj
// 今天跟成哥学习了类数组的相关用法,涨见识了,记录一下~
类数组:
//属性要为索引(数字)属性,必须要有length属性,最好要加上push
Array.prototype.push = function(target){ obj[obj.length] = target; obj.length++; }
var obj = {
"2" : " a",
"3" : "b",
"length" : 2,
"push" : Array.prototype.push
//"splice":Array.prototype.splice
//当加上这个splice属性后,此对象会以数组的形式显现,但仍然是对象。
}
obj.push(‘c‘); ====> obj[obj.length] = target; 所以 obj[2] = "c" obj.length = 3
obj.push(‘d‘); ====> obj[obj.length] = target; 所以 obj[3] = "d" obj.length = 4
======> 最后的
obj {
"2" : "c",
"3" : "d",
"length" : 4,
}
标签:str UNC array string var target color === obj
原文地址:https://www.cnblogs.com/rabbit-lin0903/p/11318553.html