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✅205. 同构字符串 #82

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bazinga-web opened this issue Aug 5, 2020 · 2 comments
Open

✅205. 同构字符串 #82

bazinga-web opened this issue Aug 5, 2020 · 2 comments

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@bazinga-web
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bazinga-web commented Aug 5, 2020

205. 同构字符串

给定两个字符串 s 和 t,判断它们是否是同构的。

如果 s 中的字符可以被替换得到 t ,那么这两个字符串是同构的。

所有出现的字符都必须用另一个字符替换,同时保留字符的顺序。两个字符不能映射到同一个字符上,但字符可以映射自己本身。

示例 1:

输入: s = "egg", t = "add"
输出: true

示例 2:

输入: s = "foo", t = "bar"
输出: false

示例 3:

输入: s = "paper", t = "title"
输出: true

说明:

你可以假设 s 和 t 具有相同的长度。

@bazinga-web bazinga-web changed the title 193. 有效电话号码 205. 同构字符串 Aug 5, 2020
@bazinga-web
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/**
 * @param {string} s
 * @param {string} t
 * @return {boolean}
 */
var isIsomorphic = function(s, t) {
    let mapS = {}, mapT = {};
    for (let i = 0; i < s.length; i++) {
        if (!mapS[s[i]]) mapS[s[i]] = t[i];
        if (!mapT[t[i]]) mapT[t[i]] = s[i];
        if (mapS[s[i]] != t[i] || mapT[t[i]] != s[i]) return false;
    }
    return true;
};

@Ray-56
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Ray-56 commented Aug 6, 2020

/**
 * @param {string} s
 * @param {string} t
 * @return {boolean}
 */
var isIsomorphic = function(s, t) {
    const mapS = new Map();
    const mapT = new Map();
    for (let i = 0; i < s.length; i++) {
        if (!mapS.has(s[i])) mapS.set(s[i], t[i]);
        if (!mapT.has(t[i])) mapT.set(t[i], s[i]);
        if (mapS.get(s[i]) !== t[i] || mapT.get(t[i]) !== s[i]) return false;
    }
    
    return true;
};

@Ray-56 Ray-56 changed the title 205. 同构字符串 ✅205. 同构字符串 Aug 6, 2020
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