1.获取字符串中的元音getYuan(str){letarr=str.match(/[aeiou]/gi)returnarr}2.对字符串进行特殊处理#parseComments(value){varexpexp=/(#|#)((?!#).)*(#|#)/gvalue=value.replace(/<[^>]*?>(.*?)/gi,'').replace(/(.*?)<\/[^>]*?>/gi,'').replace(exp,(item)=>{letnewVal=''+item+''returnnewVal})返回值}3.将每个数字平方this.squareNum(9119)squareNum(str){//letstrArr=(str+'').split('')//console.log(strArr)//letcontent=strArr.map((item)=>{//returnNumber(item)*Number(item)//}).join('')//console.log('content',content)letstrArr=(str+'').split('')letcontent=strArr.map((item)=>{returnNumber(item)*Number(item)}).join('')返回内容}3.console.log('is2','is2'.replace(/1/gi,''))//2;删除非数字字符串console.log('sdf34','sdf34'.replace(/\d/g,''))//自卫队;去掉数字4.数组的深拷贝(1)slice方法拷贝数组letcopy=[1,2,3]letdeepCopy=copy.slice()copy[2]=4console.log('copy',copy)//[1,2,4]console.log('deepCopy',deepCopy)//[1,2,3](2)concat方法复制数组letcopy=[1,2,3]letdeepCopy=[].concat(copy)copy[2]=4console.log('copy',copy)//[1,2,4]console.log('deepCopy',deepCopy)//[1,2,3](3)遍历数组forEach或for循环(4)传播操作符方法复制数组letcopy=[1,2,3]letdeepCopy=[...copy]copy[2]=4console.log('copy',copy)console.log('deepCopy',deepCopy)(5)转json再转objectletcopy=[1,2,3]letdeepCopy=JSON.parse(JSON.stringify(copy))copy[2]=4console.log('copy',copy)console.log('deepCopy',deepCopy)5.对象深拷贝(1)forloopletcopy={name:'小英子',sex:'女',age:25}letres={}for(letiincopy){console.log('i=====',i)res[i]=copy[i]}console.log('res',res)copy.name='小游子'console.log('res',res)(2)转成json再转成对象0-9?
