网页编程/JS 数组

数组排序

var points = [40, 100, 1, 5, 25, 10]
points.sort((a, b) => a-b)
console.log(points)

可运行代码

数组 Map Reduce

array = [{x:1},{x:2},{x:4}]
newValue = 2
result = array.map(item => item.x==newValue)
  .reduce((a,b)=>a||b)
console.log(result)

可运行代码

数组 Filter

array = [{x:1},{x:2},{x:4}]
newValue = 1
newArray = array.filter(item => item.x>newValue)
console.log(newArray)

可运行代码

数组 Push/Pop

var fruits = ["Orange"]
fruits.push("Kiwi")
console.log(fruits)
fruits.pop()
console.log(fruits)

可运行代码

数组 Shift/Unshift

var fruits = ["Orange", "Kiwi"]
console.log(fruits)
fruits.shift()
console.log(fruits)
fruits.unshift("Apple")
console.log(fruits)

可运行代码