Question

我正在使用JavaScript比较单个数组和多维数组。在这里，我想比较那两个数组，并显示匹配的值。

arr[1,2,3]值。

这是我的代码::我采用了一个数组，另一个作为多维数组

var arr = [1,2,3];
var md2 = [[23,8,2],[1,5,8],[1,2,3],[8,5,2]];
for(var j=0; j<md2.length ; j++){
  if(arr == md2[j]){
    console.log(arr + " ... " + md2[j]);
  }
}

所需的O / P：-[1,2,3]应该匹配并显示在控制台中

Answer 1

您可以使用.find()和.every()方法在多维数组中查找数组：

var arr1 = [1,2,3];
var arr2 = [1,2,5];
var md2 = [[23,8,2],[1,5,8],[1,2,3],[8,5,2]];

var searchAndPrint = (a1, a2) => {
  let arr = a1.find(a => a.every((v, i) => v === a2[i]));
  
  if(arr)
    console.log(arr);
  else
    console.log("No Results");
};

searchAndPrint(md2, arr1);
searchAndPrint(md2, arr2);

Answer 2

您无法在js中比较arrays。如果您想比较简单数组，可以将它们转换为string进行比较。此方法不适用于包含objects的数组。

var arr = [1,2,3];
var md2 = [[23,8,2],[1,5,8],[1,2,3],[8,5,2]];
for(var j=0; j<md2.length ; j++){
  if(arr.toString() === md2[j].toString()){
    console.log(arr + " ... " + md2[j]);
  }
}

Answer 3

您可以使用JSON.stringify比较数组。

var arr = [1,2,3];
var md2 = [[23,8,2],[1,5,8],[1,2,3],[8,5,2]];
for(var j=0; j<md2.length ; j++){
  if(JSON.stringify(arr) === JSON.stringify(md2[j])){
    console.log(arr + " ... " + md2[j]);
  }
}

Answer 4

要检查，您需要直接检查长度和项目，因为没有相同的对象引用。

import os
import time
import random

# Define the board
board = [" "," "," "," "," "," "," "," "," "," "]
#Define the print_board function
def print_board():
    print ("   |   |  ")
    print (" "+board[1]+" | "+board[2]+" | "+board[3]+" ")
    print ("   |   |  ")
    print ("---|---|---")
    print ("   |   |  ")
    print (" "+board[4]+" | "+board[5]+" | "+board[6]+" ")
    print ("   |   |  ")
    print ("---|---|---")
    print ("   |   |  ")
    print (" "+board[7]+" | "+board[8]+" | "+board[9]+" ")
    print ("   |   |  ")

os.system("clear")
print(a)
print_board()


n1=str(input("Enter Player 1 name")
n2=str(input("Enter Player 2 name")
b=str(input("Choose your symbol")

if b== "X" or "x":
    choice = input("Please select the place for your symbol X")
    board(choice) = "X"

在JavaScript中比较一维数组与多维数组

4 个答案: