如何从 javascript 中的关联数组中删除整个元素

Question

我不太擅长 javascript.I 有一个关联数组，我在其中放置一些 values.Now 来遍历数组我正在使用 foreach loop.Inside foreach 循环，如果满足条件，我想删除整个元素，并且 efficiency.However 的数组中没有空 space 我不知道如何从 foreach 循环中获取数组的索引。

here is my code:
for(var j = 0 ; j < i; j++){
        obstacles.push({ width:35, height:35, x:initialX, y:initialY});
    }

 //to iterate through the array
  obstacles.forEach(o => {
          o.x -= 2;
          context.fillRect(o.x, o.y, o.width, o.height); //create a rectangle with the elements inside the associative array
          //I need to get the index and delete the entire element and afterwards the array should resize with the other elements' index updated

        }

Answer 1

要从数组中移除符合特定条件的元素，Array.filter就派上用场了。参见 MDN

let arr1 = [1,2,3,4,5,6,7,8,9,10];
// [...] to stuff to arr1
arr1 = arr1.filter(val => val % 2 === 0);
console.log(arr1);

如何从 javascript 中的关联数组中删除整个元素

how to delete an entire element from an associative array in javascript

javascript

arrays

associative