.map(函数);--->数组中的每个元素都要执行这个函数,把执行后的结果重新的全部的放在一个新的数组中 .reverse();--->反转数组 .sort();---排序的,可能不稳定,如果不稳定,请写MDN中的那个固定的代码 .arr.slice(开始的索引,结束的索引);把截取的数组的值放在一个新的数组中,但是不包含结束的索引对应的元...
The reason I said I was confused at first is because I pulled over my knowledge ofstartsWith, where the second parameter is the starting index. So I assumed the second parameter withendsWithwould follow the same pattern and it would be the reverse ending index 😅 That's why people always...
个人博客网:https://wushaopei.github.io/(你想要这里多有) 一、Math 1、Math对象的案例 varresult=Math.max(10,20,30,40);console.log(result);//40//例子:自己定义一个对象,实现系统的max的方法functionMyMath() {//添加了一个方法this.getMax=function() {//所有数字中的最大值varmax=arguments[0]...
path.reverse():""; this.strExmp = oRslt["Exmp"]; this.strLabelPrefix = oRslt["LPfx"]; this.bIncludeDocNum = oRslt["DocN"]; this.strInitDocNum = oRslt["DNum"]; this.bIncludePageNum = oRslt["PgNm"]; this.strPageNumPrefix = oRslt["PPfx"]; this.bPageNumPost...
reserve() The reverse() method reverses an array in place 让数组顺序倒了过来 concat() var new_array = old_array.concat(value1[, value2[, ...[, valueN]]]) 数组拼接 The concat() method returns a new array comprised of the array on which it is called joined with the array(s) and...
//1. length属性表示一个字符串的长度varstr="JavaScript"; console.log(str.length);//10//2. concat() 方法将一个或多个字符串与原字符串连接合并,形成一个新的字符串并返回。varstr="JavaScript"; console.log(str.concat("HTML","CSS"));//JavaScriptHTMLCSS//3. indexOf() 方法找字符串,从某个...