size() 标准库string里面有个函数size,用来返回字符串中的字符个数,具体用法如下: string st("The expense of spirit\n");cout << "The size of "<<st<<"is"<<st.size()<< "characters, including the newline"<<endl; 那么s
开始是 javax.validation.UnexpectedTypeException: No validator could be found for type: java.lang.Integer, 不能理解为什么,后面想到自己之前代码是好好的,修改了bean 之后才出现这个问题的. 具体来说: @NotEmpty private int cnt; 我加上了这个NotEmpty 后出现的, 于是,去掉吧.结果又出现了其他错误: javax.validation.UnexpectedType
来源——tr帮助说明 TR() User Commands TR() NAME tr - translate or delete characters SYNOPSIS tr [OPTION]... SET1 [SET2] DESCRIPTION Translate, squeeze, and/or delete characters from standard input, writing to standard output. 翻译 n. 性格,品质:特性:角色:[计] 字符 vt. 印,刻
escapes 来源 [root@centos7 ~]# help echo echo: echo [-neE] [arg ...] Write arguments to the standard output. Display the ARGs on the standard output followed by a newline. Options: -n do not append a newline -e enable interpretation of the following ba