目录
字符串转数组(push)
let str1 = 'test'
let srt2 = '111'
let list = [ ]
list.push(str1)
list.push(srt2)
console.info("list",list)
打印如下
数组转字符串(join(","))
// list:['test','111']
let str3 = list.join(',') // 逗号分隔
console.info('str3', str3)
打印如下
字符串转对象
1)字符串作为对象的value
let str1 = 'test'
let srt2 = '111'
let objectData = {
key1: str1,
key2: srt2
}
console.info("objectData",objectData)
打印如下
2)字符串作为对象的key
let str1 = 'test'
let srt2 = '111'
let objectData = {}
objectData[str1] = '测试'
objectData[srt2] = '成功'
console.info("objectData",objectData)
打印如下
对象转数组
let dataList = []
let objectData1 = {
test: '测试',
111:'成功'
}
let objectData2 = {
key1: 'value1',
key2:'value2'
}
dataList.push(objectData1)
dataList.push(objectData2)
console.info("dataList",dataList)
打印如下
对象属性操作
1)添加属性
let objectData = {
key1: 'value1',
key2:'value2'
}
objectData.key3 = 'value3'
console.info("objectData",objectData)
打印如下
2)对象合并Object.assign()
Object.assign
方法的第一个参数是目标对象,后面的参数都是源对象
let test= { a: 1 };
let source1 = { b: 2 };
let source2 = { c: 3 };
Object.assign(test, source1, source2);
console.info("test",test)
打印如下
3) 删除属性
let objectData = {
key1: 'value1',
key2:'value2',
key3:'value3'
}
delete objectData.key3
console.info("objectData",objectData)
打印如下
4)修改属性名
// 将key3改为test
let objectData = {
key1: 'value1',
key2:'value2',
key3:'value3'
}
// 先把想要修改属性对应的value拿到
let str = objectData.key3
objectData.test = str
// 删除key3
delete objectData.key3
console.info("objectData",objectData)
打印如下
4) 取对象属性值 (可以用Object.keys方法)
let objectData = {
key1: 'value1',
key2:'value2',
key3:'value3'
}
Object.keys(objectData).map((key)=>{
console.info("objectData[key]",objectData[key]) // 获取到属性对应的值,做一些处理
})
打印如下