var map = new Array();//二维数组 var map2 = new Array();//一维数组 for (var i = 0; i < e.Data.length; i++) { map[i]= {value:e.Data[i].market_value,name:e.Data[i].name};//二维数组 map2.push(e.Data[i].name);//一维数组 } console.log(JSON.stringify(map)); console.log(JS
Description Given a two-dimensional array of positive and negative integers, a sub-rectangle is any contiguous sub-array of size 1*1 or greater located within the whole array. The sum of a rectangle is the sum of all the elements in that rectangle. I
for splitValue in set(dataset[:, featureIndex].tolist()): 首先set是一个无序,无重复的数据结构,所以很多时候使用它来进行去重:但是set接收的函数是原生array,这个怎么办?我现在有的numpy里面的matrix:于是我查了一下,直接使用matrix.tolist(),但是发现返回值有问题: import os os.chdir("D:\\galaxy\\aliyunsvn\\code\\MLInAction\\dataset&quo
<code class="language-python">import operator from functools import reduce a = [[1,2,3], [4,6], [7,8,9,8]] print(reduce(operator.add, a)) [1, 2, 3, 4, 6, 7, 8, 9, 8]</code> a = [[1,2,3], [5, 8], [7,8,9]] l=[] for m in range(0,3): for