#Opera

Ubuntu18.10 编译libevent出现错误: creating symbolic link XXXXXX : Operation not supported

今天在VirtualBox虚拟机下的Ubuntu18.10编译libevent源代码时,按照github中使用cmake方式:$mkdirbuild&&cdbuild$cmake…#DefaulttoUnixMakefiles.$make$makeverify#(optional)$makeinstal...

Not equal <> != operator on NULL

https://stackoverflow.com/questions/5658457/not-equal-operator-on-null<>isStandardSQL-92;!=isitsequivalent.Bothevaluateforvalues,whichNULLisnot--NULLisapl...

Shell脚本报错unary operator expected

在匹配字符串时用了类似这样的语句if[ $timeofday = "yes"]; then  echo "Good morning"  exit 0报错的原因是:如果变量timeofday的值为空,那么就if语...

phpmailer发送邮件出现错误:stream_socket_enable_crypto(): SSL operation failed with code 1.

如果开了调试,调试进去会看到错误提示: [cpp] viewplain copy smtp_code:"stream_socket_enable_crypto(): SSL operation failed with code&n...

django.db.utils.OperationalError: (1050, "Table '表名' already exists)解决方法

 django.db.utils.OperationalError:(1050,"Table'表名'alreadyexists)解决方法找到解决方案,执行:[python] viewplain copy python manage.py migrate&nbs...

loadrunner出现报错operands of = have illegal types pointer to char and `int

原始代码:voidsplit(char*p,char*str){/*传入一个数组进行p和一个以什么进行分割的str,返回切片后的值*/inti=0,j=0;chartmp[32][32]={0};char*p1=(char*)malloc(1024);while((p1=strchr(p,*str))!=NULL)//...
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