如何不断的读取行 [英] How to incrementally read the lines

问题描述

我想编写一个脚本，从文件中读取行，其中符合重量^和p ^开始。
我能够得到的重量^但我无法才能计算P ^ ...
并有20重量^与对应的p ^现在我必须让各10重量^其对应的p ^在两个不同的文件，

我怎样才能做到这一点？

 猫$（LS单位 -  *  -  slides.txt |排序-n）| grep的ST ^|拆分-l 200
 

我在上面已经code使用

 重量^等等等等
    p ^等等等等等等等等
    p ^等等等等等等等等
    p ^等等等等等等等等
    p ^等等等等等等等等
    p ^等等等等等等等等等等等等
    p ^等等等等等等等等等等等等等等等等
    p ^等等等等等等等等等等等等
    p ^等等等等等等等等等等等等
    p ^等等等等等等等等等等等等
 

解决方案

看来你之前一些空间p ^ 。我复制你的pested例如，这grep的工作得很好
的grep -E[] *（重量\\ ^ | P \\ ^）＆LT;文件＆gt; 它考虑到可能存在的空白的n个开始前行了。您可以附加的xargs 它

i want to write a script that reads lines from file where the line starts with wt^ and p^. i am able to get the wt^ but i am not able to get p^... and there are 20 wt^ with corresponding p^ now i have to get 10 each wt^ with its corresponding p^ in two different files,

how can i do this?

cat $( ls unit-*-slides.txt | sort -n ) | grep "st^" | split -l 200

i have used above code

wt^blah blah
    p^blah blah blah blah
    p^blah blah blah blah
    p^blah blah blah blah
    p^blah blah blah blah
    p^blah blah blah blah blah blah
    p^blah blah blah blah blah blah blah blah
    p^blah blah blah blah blah blah
    p^blah blah blah blah blah blah
    p^blah blah blah blah blah blah

解决方案

it seems you have some spaces before p^. I copy pested your example and this grep worked fine grep -E "[ ]*(wt\^|p\^)" <file> it takes into account that there might be n number of whitespace before the beginning of the line. You can append xargs with it

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