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