向数组的对象里添加新属性

向数组的对象里添加新属性

(item => {
= 1;
})
(a:就是添加的属性 1是值)
(arr)

数组对象里添加一个新属性

var array=[
			{name:"名称", age:"年龄"},
		   	{name:"名称", age:"年龄"},
		   	{name:"名称", age:"年龄"}
		   	]
for(var i=0; i<; i++){
	array[i].sex="性别";
}

/*([{name:"名称", age:"年龄", sex:"性别"},
			   {name:"名称", age:"年龄", sex:"性别"},
 			   {name:"名称", age:"年龄", sex:"性别"}])*/

若是数组元素添加到数组每个对象中

var arrlist = [1,2,3]
var array=[
			{name:"名称", age:"年龄"},
		   	{name:"名称", age:"年龄"},
		   	{name:"名称", age:"年龄"}
		   	]
for(var i=0; i< ; i++){
   	array[i].home=arrlist[i];
}
/*([{name:"名称", age:"年龄", sex:"性别",home:'1'},
			   {name:"名称", age:"年龄", sex:"性别",home:'2'},
 			   {name:"名称", age:"年龄", sex:"性别",home:'3'}])*/

替换数组对象里的某一个属性值

var array=[{name:"名称", age:"年龄"},
		   {name:"名称", age:"年龄"},
		   {name:"名称", age:"年龄"}]
for(var i=0; i<; i++){
	array[i].age="替换内容";
}

/*([{name:"名称", age:"替换内容"},
			   {name:"名称", age:"替换内容"},
 			   {name:"名称", age:"替换内容"])
 也可变成动态的值去添加，替换			   */

保留两位小数

var xiao = 12.3892
var two=(2);
(two) //12.39