在javascript中查找数组中连续数字之间的差异

本文介绍了在javascript中查找数组中连续数字之间的差异的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有以下数组

A = [1,2,3,3,0]

如果我想计算数组中连续数字之间的差异。我可以在Matlab中使用内置函数（ diff ）

B = diff（A）返回

B = [1,1,0，-3]

我想知道javascript中有任何类似的内置函数吗？

解决方案

没有这样的内置函数，但写一个很简单：

function diff（ary）{ var newA = []; for（var i = 1; i< ary.length; i ++）newA.push（ary [i] - ary [i - 1]）$ ​​b $ b返回newA; } var A = [1,2,3,3,0]; console.log（diff（A））// [1,1,0，-3]

这里是小提琴： jsfiddle/ewbmrjyr/1/ / p>

I have the following array

A=[1,2,3,3,0]

and if I want to calculate difference between consecutive numbers in an array. I could do it in Matlab with using built-in function (diff)

B=diff(A) returns

B = [1,1,0,-3]

I would like to know there is any similar built-in function in javascript?

解决方案

There's no such built-in function, but writing one is simple:

function diff(ary) { var newA = []; for (var i = 1; i < ary.length; i++) newA.push(ary[i] - ary[i - 1]) return newA; } var A = [1, 2, 3, 3, 0]; console.log(diff(A)) // [1, 1, 0, -3]

here is the fiddle: jsfiddle/ewbmrjyr/1/