javascript - 有没有优雅的函数可以在数组中查找数组？ JavaScript

Question

例如，我想检查数组是否包含值数组而不是值

var arr = [1, 2, 3];
arr.contains([1, 2]); // returns true
// and
arr.contains([1, 5]); // must be false

有一个名为 contains in underscore _.contains 的方法，但它的工作方式类似于 javascript 中的 .indexof() 而不是它返回 true 和false 并且只查找值而不查找数组

还有一个方法Array.prototype.includes()在 javascript 中也接受单个输入而不是数组

Answer 1

actually I want to check if second array has all the keys present in first array I want to check with AND

for example [1,2,3,4].contains([1,4]) must return true where as [1,2,3,4].contains([1,9]) must return false, hope this makes sense, I'm for now using underscores intersection and second array with intersection result it must be same, its still long procedure....

您可以在 for 循环中使用 Array.prototype.includes()

var arr = [1,2,3,4];

function contains(arr) {
  for (var i = 0, included = true; i < arr.length
       ; included = included && this.includes(arr[i]), i++);
  return included
}

Array.prototype.contains = contains;

console.log(arr.contains([1, 4]), arr.contains([9, 1]), arr.contains([1, 5]))