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Go 100 mistakes - #50: Checking an error type inaccurately

时间：2024-02-21 22:00:13浏览次数：25

标签：Checking 50 mistakes inaccurately error Go

标签：Checking,50,mistakes,inaccurately,error,Go
From： https://www.cnblogs.com/zhangzhihui/p/18026299

Go 100 mistakes - #45: Returning a nil receiver
We’veseeninthissectionthatinGo,havinganilreceiverisallowed,andaninterfaceconvertedfromanilpointerisn’tanilinterface.Forthatreason,whenwehave toreturnaninterface,weshouldreturnnotanilpointerbuta......
Go 100 mistakes - #42: Not knowing which type of receiver to use
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Go 100 mistakes - #41: Substrings and memory leaks
WeneedtokeeptwothingsinmindwhileusingthesubstringoperationinGo. First,theintervalprovidedisbasedonthenumberofbytes,notthenumberofrunes. Second,asubstringoperationmayleadtoamemoryleakastheresultings......
Go 100 mistakes - #39: Under-optimized string concatenation
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Go 100 mistakes - #37: Inaccurate string iteration
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Go 100 mistakes - #35: Using defer inside a loop
Wewillimplementafunctionthatopensasetoffileswherethefilepathsare receivedviaachannel.Hence,wehavetoiterateoverthischannel,openthefiles,and handletheclosure.Here’sourfirstversion:Thereisasignificantproblemwithth......
P5057 [CQOI2006] 简单题
原题链接题解区间修改+单点查询对于一个点，查询的时候翻转的次数如果是奇数，是1，如果是偶数，是0所以题目转变成对区间上的点加一，然后求单点的奇偶性树状数组对一串序列加1，相当于对其差分序列的\([l]++，[r+1]--\)code#include<bits/stdc++.h>usingnamespacestd;inta[10000......
2024.2.20闲话——luogu5021随机选取边的正确性
推歌：生きる(feat.可不)——水野あつ这首歌听完之后接着转去咖喱乌冬了，歌词甚至能接上，没绷住。刚刚写证明中间把wxy的杯子碰倒洒键盘上了，抢救键盘的过程中碰到缝就有水，有点涩。但是这个键盘里面怎么这么脏啊？下面来证luogu5021在菊花树中以任何顺序选取边并采取贪心策略的......
luogu5021题解
形式化题意：在一棵树上找\(m\)条没有重复边的路径，使得最短的路径最大，求这个最短路径的最大值。看到这个最大值就想二分答案。\(1\lem\len-1\)，我们可以将长度的下限为最短的那条边，此时所有边都是符合要求的路径。长度的上限为所有路径的长度除以\(m\)，向下取整。我们在判断......
Go 100 mistakes - #32: Ignoring the impact of using pointer elements in range lo
Thissectionlooksataspecificmistakewhenusingarangeloopwithpointerelements.Ifwe’renotcautiousenough,itcanleadustoanissuewherewereferencethe wrongelements.Let’sexaminethisproblemandhowtofixit.Beforewebegin,let’scla......

Go 100 mistakes - #50: Checking an error type inaccurately

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