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有标题和行号的猫？

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有标题和行号的猫？

我有这样的文件

$ cat trapetz
x = 0:0.0001:7pi
plot(x, sin(x).*cos(x))
Area = trapz(x, sin(x).*cos(x))
$ cat simpson 
f = inline(sin(x).*cos(x));
Area2 = quad(f, 0, 7pi, 1e-16)

我想要这样的东西

$ cat -b -t MISSING? trapetz simpson 
     traapetz 
     1  x = 0:0.0001:7pi
     2  plot(x, sin(x).*cos(x))
     3  Area = trapz(x, sin(x).*cos(x))
     simpson
     1  f = inline(sin(x).*cos(x));
     2  Area2 = quad(f, 0, 7pi, 1e-16)

或者如果有一些简单的方法在那里添加厕所就更好了：

$ find |tee |...|wc... I feel now reinventing the wheel, there must be some ready...
     traapetz: xyz chars
     1  x = 0:0.0001:7pi
     2  plot(x, sin(x).*cos(x))
     3  Area = trapz(x, sin(x).*cos(x))
     simpson: zyx chars
     1  f = inline(sin(x).*cos(x));
     2  Area2 = quad(f, 0, 7pi, 1e-16)

但我得到

$ cat -b -t trapetz simpson 
     1  x = 0:0.0001:7pi
     2  plot(x, sin(x).*cos(x))
     3  Area = trapz(x, sin(x).*cos(x))
     4  f = inline(sin(x).*cos(x));
     5  Area2 = quad(f, 0, 7pi, 1e-16)

并不是真正需要 cat，而是一些简单的工具来共享和显示上面的代码片段，而不是 Pastebin。我想要一些标准的命令行东西。我正在尝试为 codegolf.se 创建简单的拼图粘贴，以便人们可以轻松地重现事物......

答案1

快速 shell 脚本：

#!/bin/sh
# usage: scriptname file1 file2 ...

for file in "$@"
do
    [ -f "$file" ] || continue
    set -- `wc "$file"`
    echo "${file}: lines $1 words $2 bytes $3"
    cat -b -t "$file"
done

它的行为类似于您的示例输出，因此丢失的文件将被默默地忽略。

答案2

一个非常粗略的 awk 实现：

BEGIN{
    OLDFILENAME="";
}
FNR==1{
    if (OLDFILENAME != "") {
        printf("#### Processed (chars: %s - lines: %s)\n", FWC, FLC);
    }
    printf("#### Processing: %s\n", FILENAME);
    OLDFILENAME=FILENAME;
    FWC=0;
    FLC=0;
}
{
    printf("%04d - %s\n", FNR, $0);
    FWC = FWC + length($0);
    FLC = FLC + 1;
}
END{
    if (OLDFILENAME != "") {
        printf("#### Processed (chars: %s - lines: %s)\n", FWC, FLC);
    }
}

执行awk -f AWKFILE trapetz simpson得到：

#### Processing: trapetz
0001 - x = 0:0.0001:7pi
0002 - plot(x, sin(x).*cos(x))
0003 - Area = trapz(x, sin(x).*cos(x))
#### Processed (chars: 70 - lines: 3)
#### Processing: simpson
0001 - f = inline(sin(x).*cos(x));
0002 - Area2 = quad(f, 0, 7pi, 1e-16)
#### Processed (chars: 57 - lines: 2)

答案3

tail -n +1 trapetz simpson将打印每个文件，并带有给出文件名的前导标题。nl trapetz simpson打印行号但不打印文件名。你需要使用awk或一些贝壳胶将两者结合起来。

for x in trapetz simpson; do
  echo "$x: $(wc -c <"$x") bytes"
  nl "$x"
done

这是一个 awk 解决方案，它在底部打印字节数：

awk '
    FNR == 1 && NR != 1 {print "end", fn, chars, "characters"; bytes=0}
    END {print "end", fn, chars, "characters"}
    FNR == 1 {print "begin", FILENAME; fn=FILENAME}
    1 {chars += 1 + length; printf "%7d ", FNR; print}
' trapetz simpson

答案4

该命令列表：

echo -e "trapetz\nsimpson" | xargs -I fn sh -c "wc -c fn | sed 's/\(.*\) \(.*\)/\2: \1 chars/';cat -b -t fn"

产生这个输出

trapetz: 73 chars
     1  x = 0:0.0001:7pi
     2  plot(x, sin(x).*cos(x))
     3  Area = trapz(x, sin(x).*cos(x))
simpson: 59 chars
     1  f = inline(sin(x).*cos(x));
     2  Area2 = quad(f, 0, 7pi, 1e-16)

软件版本有：

  • bash 4.2.53
  • GNU sed 4.2.2
  • xargs 4.5.11
  • 猫8.21

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