Commit555086b

zongyanqi

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add Easy_387_First_Unique_Character_in_a_String

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	`1`	`+/**`
	`2`	`+ * Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.`
	`3`	`+`
	`4`	`+ Examples:`
	`5`	`+`
	`6`	`+ s = "leetcode"`
	`7`	`+ return 0.`
	`8`	`+`
	`9`	`+ s = "loveleetcode",`
	`10`	`+ return 2.`
	`11`	`+ Note: You may assume the string contain only lowercase letters.`
	`12`	`+`
	`13`	`+`
	`14`	`+ */`
	`15`	`+`
	`16`	`+/**`
	`17`	`+ *@param {string} s`
	`18`	`+ *@return {number}`
	`19`	`+ */`
	`20`	`+varfirstUniqChar=function(s){`
	`21`	`+`
	`22`	`+for(vari=0;i<s.length;i++){`
	`23`	`+varch=s[i];`
	`24`	`+if(s.lastIndexOf(ch)===s.indexOf(ch))returni;`
	`25`	`+}`
	`26`	`+return-1;`
	`27`	`+};`
	`28`	`+`
	`29`	`+console.log(firstUniqChar('leetcode'));`
	`30`	`+console.log(firstUniqChar('loveleetcode'));`

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