主题
includes
js
_.includes(collection, value, [fromIndex=0])检查 value 是否在 collection 中。如果 collection 是字符串,则检查它是否为 value 的子字符串,否则使用 SameValueZero 进行相等性比较。如果 fromIndex 为负,则将其用作距 collection 末尾的偏移量。
¥Checks if value is in collection. If collection is a string, it's checked for a substring of value, otherwise SameValueZero is used for equality comparisons. If fromIndex is negative, it's used as the offset from the end of collection.
新增于
¥Since
0.1.0
参数
¥Arguments
collection(数组|对象|字符串):要检查的集合。¥
collection(Array|Object|string): The collection to inspect.value(*):要搜索的值。¥
value()*: The value to search for.[fromIndex=0](数值):要从中搜索的索引。¥
[fromIndex=0](number): The index to search from.
返回
¥Returns
(布尔):如果找到 value,则返回 true,否则返回 false。
¥(boolean): Returns true if value is found, else false.
示例
¥Example
js
_.includes([1, 2, 3], 1);
// => true
_.includes([1, 2, 3], 1, 2);
// => false
_.includes({ 'a': 1, 'b': 2 }, 1);
// => true
_.includes('abcd', 'bc');
// => true