[英]String containing certain characters causing UITextView to wrap too soon
[英]How to search for a String containing certain Characters in a Set?
如何搜索Set
以获取以下结果?
let brands: Set = ["apple", "microsoft", "hp", "lenovo", "asus", "qualcomm", "intel", "kingston"]
findValueinSet(brands, withCharacters: "a", "u") // returns "asus"
您可以同时过滤集合和数组
filter(setOrArray, predicate)
无论哪种情况,结果都是一个数组。 给定集合的所有字符是否包含在字符串中,可以使用
searchCharacters.isSubsetOf(string)
一起:
let brands: Set<String> = ["apple", "microsoft", "hp", "lenovo", "asus", "qualcomm", "intel", "kingston"]
let searchCharacters = Set("au")
let filtered = filter(brands) { searchCharacters.isSubsetOf($0) }
println(filtered) // [qualcomm, asus]
如果brands
是数组或String
集合,则此方法有效。
注意:您不应在Swift源代码中使用68k元素定义文字数组。 最好使用资源文件(简单的文本文件或属性列表),然后在运行时从那里加载数组。
这将返回一个集合中的数组,其中包含包含另一个集合中的字母的字符串:
let brands: Set<String> = ["apple", "microsoft", "hp", "lenovo", "asus", "qualcomm", "intel", "kingston"]
let filters: Set<Character> = ["a", "u"]
func predicate(item: String, filters:Set<Character>) -> Bool {
for single in filters {
if contains(item, single) {
return true
}
}
return false
}
let found = filter(brands, {predicate($0, filters)})
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