public int strStr(String haystack, String needle) { if(haystack == null || needle == null) { return -1; } for (int i = 0; i <= (haystack.length()-needle.length()); i++) { int m = i; for (int j = 0; j < needle.length(); j++) { if (needle.charAt(j) ==
VB (空字串).Null.Empty.与 Nothing 的区别 http://blog.sina.com.cn/s/blog_3f39ffb50100bguw.html 变量 A.B.C.D 分别等于 0."".Null. Empty. Nothing 的哪一个?Dim ADim B As StringDim C As IntegerDim D As ObjectA 等于 Empty, 因为尚未初始化的「不定型变量」都等于 Empty.但如果检测 A = ""
JavaScript 实现 let str = 'AAABBAACCAAAADDE' function continuousString(str) { let finalObj = {} let tempObj = {} let count = 0 for (let i = 0; i < str.length; i++) { const code = str[i] if (code === str[i + 1]) { // 初次时候,两个相等 if (!tempObj[code]) { temp