返回值一般都是给shell程序使用, 如果指向在终端使用grep查找, 则不用关心其返回值) grep操作会返回其状态,对于一般函数来讲,就是函数内部的return和exit等。 返回值通过变量$?获取。 grep的man手册中是这样定义返回值的: EXIT STATUS The exit status is 0 if selected lines are found, and 1 if not found...
Grep or sed - printing line only with exact match Hello. In my script, some command return : q | kernel-default | package | 3.19.0-1.1.g8a7d5f9 | x86_64 | openSUSE-13.2-Kernel_stable_standard | kernel-default | package | 3.19.0-1.1.g8a7d5f9 | i586 | openSUSE-13.2-Kernel_st...
return $first + $second + $third; } # 办法2 sub sumarg { # $_[0] 表示参数数组@_的第一个元素。其余类推。 my $first = $_[0]; my $second = $_[1]; my $third = $_[2]; # 返回其和值。缺点: 同sumvar. 只是通过这里学习 $_[0] 这种用法。 return $first + $second + $thir...
Help with a GREP to find only first match in a paragraph. AK09M Participant , /t5/indesign-discussions/help-with-a-grep-to-find-only-first-match-in-a-paragraph/td-p/12952278 May 19, 2022 May 19, 2022 Copy link to clipboard Copied Hi I need a GREP ...
/usr/include/boost/endian/detail/lightweight_test.hpp:// TODO: Should all test macros return bool? See BOOST_TEST_MEM_EQ usage in fp_exaustive_test,cpp /usr/include/boost/detail/named_template_params.hpp: // iterator_adaptor_test.cpp when using this method. ...
[ ] bracketsare used to match any of a set of characters. $ grep "Class [123]" Students.txt This command will return any lines that say ‘Class 1’, ‘Class2’, or ‘Class 3’. [-] brackets with a hyphencan be used to specify a range of characters, either numerical or alphabetic...
If -o is combined with -v (invert the sense of the match to find non-matching lines), no output is generated, but the return code is set appropri- ately. If the matched portion of the line is SunOS 5.11 Last change: 10 User Commands PCREGREP(1) empty, nothing is output unless ...
m <- do.call(rbind, lapply(seq_along(res),function(i) {if(result[i] == -1)return("") st <- attr(result,"capture.start")[i, ] substring(res[i], st, st + attr(result,"capture.length")[i, ] -1) })) colnames(m) <- attr(result,"capture.names") ...
Press ESC to return control to the query pattern prompt (the globs are saved). When a glob is preceded by a ! or a ^, skips files whose name matches the glob When a glob contains a /, full pathnames are matched. Otherwise basenames are matched. When a glob ends with a /, ...
when used with the--byte-offsetoption, displays byte offsets as UNIX-style byte offsets (that is, carriage return characters are ignored). displays the version number ofgrep. displays all linesnotmatching apattern. only match lines where the pattern matches a whole word. To be a whole word...