检查数组中是否存在项目

Question

我需要检查主数组中是否存在特定值。

Example:

elem

Answer 1

if(listCategoryId.indexOf(actualCategoryId) != -1) {
  console.log('exists')
}

Answer 2

如果Array.prototype.indexOf()返回大于或等于0的索引，则该数组包含指定的元素。否则它将返回-1：

＆＃13;

＆＃13;

var hideFilters = function() {
  var listCategoryId = ['1000014', '1000015', '1000016', '1000017', '1000018', '1000019', '1000021', '1000086'];

  var actualCategoryId = '1000018';

  if (listCategoryId.indexOf(actualCategoryId) > -1) {
    console.log('is equal');
  } else {
    console.log('fuen... fuen...');
  }
};

hideFilters();

＆＃13;

＆＃13;

＆＃13;

Answer 3

您可以使用 $.inArray

var listCategoryId = ['1000014', '1000015', '1000016', '1000017', '1000018', '1000019', '1000021', '1000086'];

var actualCategoryId = '1000018';

if ($.inArray(actualCategoryId, listCategoryId) != -1) {
  console.log('exists');
}

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