Underscore.JS lastIndexOf方法 语法 _.lastIndexOf(array, value, [fromIndex])JavaScriptCopy lastIndexOf方法返回数组中值的索引。如果传递了fromIndex参数,则搜索将从数组的fromIndex开始。 示例 var _ = require('underscore'); var list = [1, 2, 3, 4, 5, 6, 3, 4] //Example: get last index of 3 result = _.lastIndexOf(list, 3); console.log(result) //Example: get last index of 3 starting from 4th index result = _.lastIndexOf(list, 3, 4 ); console.log(result)JavaScriptCopy 将上述程序保存在 tester.js 中。运行以下命令来执行该程序。 命令 >node tester.jsJavaScriptCopy 输出 6 2JavaScriptCopy