JavaScript之Array 中everysomemapfilter reduce

JavaScript之Array 中every,some,map,filter, reduce1 1.every和some every表示数组中的每一项都必须通过才会返回true some表示只要数组元素某一项满足即可 var arr = [1, 2, 3, 4, 5, 6, 7,8, 9]; var a = arr.every(item=> item > 6); console.log(a); // false var b = arr.some(item=> item > 6); console.log(b); // true 2.map() – 映射 var newArr = array