js 2023. String pair equal to the target string after connection

To give you one Numbers Array of strings nums And a Numbers character string target , Please return nums[i] + nums[j] （ Two string connections ） The result is equal to the target The subscript (i, j) （ Need to meet i != j） Number of .

Example 1：

Input ：nums = [“777”,“7”,“77”,“77”], target = “7777”
Output ：4
explain ： Subscript pairs that meet the requirements include ：

• (0, 1)：“777” + “7”
• (1, 0)：“7” + “777”
• (2, 3)：“77” + “77”
• (3, 2)：“77” + “77”
  Example 2：

Input ：nums = [“123”,“4”,“12”,“34”], target = “1234”
Output ：2
explain ： Subscript pairs that meet the requirements include

• (0, 1)：“123” + “4”
• (2, 3)：“12” + “34”

source ： Power button （LeetCode）

/** * @param {string[]} nums * @param {string} target * @return {number} */
var numOfPairs = function(nums, target) {
    
    let count  = 0
    for(let i =0;i<nums.length;i++){
    
        for(let j =0;j<nums.length;j++){
    
            if(nums[i]+""+nums[j]==target && i !=j){
    
                count++
            }
        }
    }
    return count
    console.log(count)
};