💡tips

🔴 主題

• fill 2D array

• IIFE

• arr.containsSubarray() - closure with internal parameter ⭐️

💈範例

// filter using `thisArg`
const arr = [1,0,2,0,3,0,4,5,6,7,8,9,10,11,12,13,14];

// ⭐️ requires a normal function, doesn't work with arrow functions.
//                          ╭───  ⭐️  ───╮
const filtered = arr.filter(function(item) {
  if (this.count < 10 && item > 0) {          // ⭐️ this == thisArg
    this.count++;
    return true;
  }
  return false;
}, {count: 0});
// ╰── ⭐️ ──╯ <--- `thisArg`

🗣 討論

• JS - Get top 5 max elements from array

• How to limit for 10 results the array.filter?