awk的反向线条和文字 [英] Awk reverse both lines and words

问题描述

我是新来的编程语言和东西
所以我有awk的所有行扭转和以及在这些线路中的全部的话，从一个文件并打印出来。

I'm new to programming language and stuff so I have to reverse with awk all the lines and as well all the words in those lines, from a file and print them out.

文件1逆转：

AA BB CC

富做的

和在文件1的输出打印应该是这样的：

And the output printing of the "File1" should be this:

因为这样做富

CC BB AA

我在每一行试过这个字反转：

I tried this for word reverse in each line:

为（I = NF; I＆GT; 1;我 - ）的printf（％S，$ I）;的printf（％S \\ n，$ 1）


但如果我想打印反转线我必须这样做。

but if I want to print the reversed lines I have to do this

{a[NR]=$0
}END{for(i=NR; i; i--) print a[i]}

我需要两个文件工作，并在终端以下命令：

I need to work with two files with this command in terminal:

awk -f commandFile FileToBePrinted

问题是我在这一切beginer，我不知道如何这两个结合起来。
谢谢！

The problem is I'm beginer in all this and I don't know how to combine those two. Thanks!

推荐答案

千电子伏的解决方案看起来扭转每个字的文本。你比如输出不显示，但他的关键点是使用功能。

Kev's solution looks to reverse the text in each word. You example output doesn't show that, but his key point is to use a function.

您有code你需要，你只需要重新安排它一点。

You have the code you need, you just need to rearrange it a little.

cat file1
aa bb cc
foo do as

cat commandFile

function reverse( line ) {
  n=split(line, tmpLine)
  for (j=n; j>0; j--) {
    printf("%s ",tmpLine[j] )
  }

}
# main loop
{ a[NR]=$0 }

# print reversed array
END{ for(i=NR; i>0; i--) printf( "%s\n",  reverse(a[i]) ) }

运行

 awk -f commandFile file1

输出

as do foo
cc bb aa

有一对夫妇的我做了，用细微的变化 N =分（线，tmpLine）...打印tmpLine [J] ，是分析的常用方法输入的函数中的一行打印出来。我不认为$ 1经销商也有从一个数组（你一个[I]值）传递一个取值范围，所以我改成了split..tmpLine [J]。我还发现，从端部的'我'变量被关在范围中的函数逆转，所以我改变了到J来消除歧义的情况。

There were a couple of minor changes I made, using n=split(line, tmpLine) ... print tmpLine[j], is a common method of parsing a line of input in a function to print it out. I don't think the $1 vars have scope from a value passed in from an array (your a[i] value), so I changed it to split..tmpLine[j]. I also found that the 'i' variable from END section was kept in scope in the function reverse, so I changed that to j to disambiguate the situation.

我必须弄清楚一些事情，所以下面是我使用的调试版本。

I had to figure out a few things, so below is the debug version that I used.

如果你将有机会获得呆子，那么你就应该好好学习如何使用调试器可用。如果你使用的系统上的awk / GAWK / NAWK没有一个调试器，那么这是理解什么是您的code发生的一种方法。如果你重定向你的程序输出到文件或管道，如果你的系统支持的/ dev /标准错误的符号，你可以打印调试行出现，即。

If you're going to have access to gawk, then you'll do well to learn how to use the debugger that is available. If you're using awk/gawk/nawk on systems without a debugger, then this is one method for understanding what is happening in your code. If you're redirecting your programs output to a file or pipe, AND if you system supports "/dev/stderr" notation, you could print the debug lines there, i.e.

 #dbg print "#dbg0:line=" line > "/dev/stderr"

有些系统有其他的符号来访问标准错误，所以如果你会更这样做，这是值得找出哪些是可用的。

Some systems have other notations for accessing stderr, so if you'll be doing this much, it is worthwhile to find out what is available.

cat commandFile.debug
function reverse( line ) {
  n=split(line, tmpLine)
  #dbg print "#dbg0:line=" line
  #dbg print "#dbg1:n=" n "\tj=" j "\ttmpLine[j]=" tmpLine[j]
  for (j=n; j>0; j--) {
    #dbg print "#dbg2:n=" n "\tj=" j "\ttempLine[j]=" tmpLine[j]
    printf("%s ",tmpLine[j] )
  }

}
# main loop
{ a[NR]=$0 }

# print reversed array
#dbg END{ print "AT END";  for(i=NR; i>0; i--) printf( "#dbg4:i=%d\t%s\n%s\n", i, a[i] , reverse(a[i])
 ) }
END{ for(i=NR; i>0; i--) printf( "%s\n",  reverse(a[i]) ) }

我希望这有助于。

I hope this helps.

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