我试图解决 leetcode 的一个编码问题
给定一个字符串单词数组（没有重复项），返回给定单词列表中的所有串联单词。
串联单词定义为完全由给定数组中至少两个较短单词（不一定不同）组成的字符串。
示例1：
Input: words = ["cat","cats","catsdogcats","dog","dogcatsdog","hippopotamuses","rat","ratcatdogcat"]
Output: ["catsdogcats","dogcatsdog","ratcatdogcat"]
示例2：
Input: words = ["cat","dog","catdog"]
Output: ["catdog"]
这是我的代码
var findAllConcatenatedWordsInADict = function (words) {
let set = new Set(words)
let res = []
let cache = {}
for (let word of words) {
if (dfs(word)) res.push(word)
}
return res
function dfs(word) {
// if (!word) return true
if (cache[word] !== undefined) return cache[word]
for (let i = 1; i < word.length; i++) {
let prefix = word.substring(0, i)
let suffix = word.substring(i)
if (set.has(prefix)) {
if ( set.has(suffix) || dfs(suffix)) {
cache[word] = true
return true
}
}
}
cache[word] = false
return false
}
};
但是以下测试用例失败了 -
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任何帮助/提示将不胜感激
对象具有
constructortoStringMapObject.create(null)var findAllConcatenatedWordsInADict = function (words) {
let set = new Set(words)
let res = []
let cache = new Map;
for (let word of words) {
if (dfs(word)) res.push(word)
}
return res
function dfs(word) {
if (cache.has(word)) return cache.get(word);
for (let i = 1; i < word.length; i++) {
let prefix = word.substring(0, i)
let suffix = word.substring(i)
if (set.has(prefix)) {
if ( set.has(suffix) || dfs(suffix)) {
cache.set(word, true);
return true
}
}
}
cache.set(word, false);
return false
}
};