#read onefileline by lineforlinein$(cattest1.txt);doecho$line ;done; #whilereadsplitline by spacewhileread linedoforwordin$linedoecho$worddone;done<test1.txt #stringsplitor substring input=type=abcdefgecho$input
此外,第二章对printf的描述中列出的转义序列被替换为它们所代表的字符: $ echo $'\'line1\'\n\'line2\'' 'line1' 'line2' 引用的参数可以包含文字换行符: $ sa "Argument containing `> a newline"` `:Argument containing` `a newline:` ![Image](https://gitee.com/OpenDocCN/vkdoc-linux-...
line: " ' 在不输入基点的情况下获取第一点...startPnt = ThisDrawing.Utility.GetPoint(, prompt1) ' 使用上面输入的点作为基点 endPnt = ThisDrawing.Utility.GetPoint...(startPnt, prompt2) ' 使用输入的两个点创建一条直线 ThisDrawing.ModelSpace.AddLine startPnt, endPnt ThisDrawing.Application.Zoom...
结尾出现的由<space>、<tab>、或者<newline> 构成的序列就会被忽略;而由IFS中任意字符组成的序列如果不是出现在头部或尾部就成为单词的分隔符。如果IFS中任意字符组成的序列如果不是出现在头部或尾部就成为单词的分隔符。如果IFS 的值不是默认的并且含有由空格和制表符这 两个空白符(称为IFS分隔符)构成的空白符...
Like SPACE, but scrolls a full screenful, even if it reaches end-of-file in the process. ENTER or RETURN or ^N or e or ^E or j or ^J Scroll forward N lines, default 1. The entire N lines are displayed, even if N is more than the screen size. ...
如果是在原来的字符串上做替换，那么就有可能覆盖修改在该字符串后面的内存。如果是创建新的字符串并在...
sed -E 's/[[:space:]]+/,/g' orig.txt > modified.txt # The character class [:space:] will match all whitespace (spaces, tabs, etc.). If you just want to replace a single character, eg. just space, use that only. # EDIT: Actually [:space:] includes carriage return, so this...
trim_string() { # Usage: trim_string " example string " : "${1#"${1%%[![:space:]]*}"}" : "${_%"${_##*[![:space:]]}"}" printf '%s\n' "$_" }用法示例:$ trim_string " Hello, World " Hello, World $ name=" John Black " $ trim_string "$name" John Black...
The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard. Backslash escape sequences, if present, are decoded as follows: \a alert (bell) \b backspace \e \E an escape character \f form feed \n new line \r carriage return \t horizontal...
read is a bash built-in command that reads a line from the standard input (or from the file descriptor) and split into words.