[高难度]文本指定范围处理后原位置插入

chendeshen

Input文件： sample.txt
-----------------------
shit|dog|44446|ride|cscscs|450|ioio
port|yard|45.3|ooo|lead|78543.34|rrr


固定函数：
function doSomething
{
    echo `printf "%.15E" $1`
}


要求：已“|”为分隔符的第3和第6个区间（3，6若可作为可变参数better~）执行function doSomething，其余原样输出，如下：

Output文件：result.txt
-----------------------
shit|dog|4.444600000000000E+04|ride|cscscs|4.500000000000000E+02|ioio
port|yard|4.530000000000000E+01|ooo|lead|7.854334000000000E+04|rrr

jason680

回复 1# chendeshen

try this way ...

$ eval $(sed -r '1s/^/echo -e "/;2,$s/^/"\\n/;s/$/x"/;s/([^|]+)/`doSomething \1`/3;s/([^|]+)/`doSomething \1`/6' sample.txt)
shit|dog|4.444600000000000E+04|ride|cscscs|4.500000000000000E+02|ioiox
port|yard|4.530000000000000E+01|ooo|lead|7.854334000000000E+04|rrrx
   

BTW, it seems be X-Y problem
http://bbs.chinaunix.net/forum.php?mod=viewthread&tid=4118053&fromuid=24785593

lifayi2008

楼上的看不懂

zxy877298415

回复 3# lifayi2008
其他的貌似都重复打印了！


   

love_shift

1. root@ubuntu:~# awk -F"|" 'function dosomething(thing){ return sprintf("%.15E",thing) }{$3=dosomething($3);$6=dosomething($6)}1' file
   
2. shit dog 4.444600000000000E+04 ride cscscs 4.500000000000000E+02 ioio
   
3. port yard 4.530000000000000E+01 ooo lead 7.854334000000000E+04 rrr
   
4. root@ubuntu:~# more file
   
5. shit|dog|44446|ride|cscscs|450|ioio
   
6. port|yard|45.3|ooo|lead|78543.34|rrr

复制代码

xdxduser

#!/bin/bash -x

function doSomething() {
        echo `printf "%0.15E" $1`
}

function change() {
        local arr=$1; shift
        local num=$(echo $arr | awk -F'|' '{print NF}')

        for ((i = 0; i < $num; i++))
        do
                field[$i]=$(echo $arr | awk -F'|' '{print $'$(($i+1))'}')
        done
        field[2]=$(doSomething ${field[2]})
        field[5]=$(doSomething ${field[5]})

        echo ${field[@]} | awk 'BEGIN{OFS="|"}{NF=NF;print $0}' >> result.txt
}

for line in `cat $1`
do
        change $line
done

初学者，求各位大神精简。。。
能直接在awk里定义函数的方法最好不过了。。。

lifayi2008

{:2_166:} 没写好 明天 再改改回复 4# zxy877298415


   

chendeshen

回复 5# love_shift


$ cat sample.txt
shit|dog|44446|ride|cscscs|450|ioio
port|yard|45.3|ooo|lead|78543.34|rrr

$ awk -F"|" 'function dosomething(thing){ return sprintf("%.15E",thing) }{$3=dosomething($3);$6=dosomething($6)}1' sample.txt
shit dog 4.444600000000000E+04 ride cscscs 4.500000000000000E+02 ioio
port yard 4.530000000000000E+01 ooo lead 7.854334000000000E+04 rrr


System: RHEL

chendeshen

回复 2# jason680


   
$ cat  456.sh
function doSomething
{
    echo `printf "%.15E" $1`
}
eval $(sed -r '1s/^/echo -e "/;2,$s/^/"\\n/;s/$/x"/;s/([^|]+)/`doSomething \1`/3;s/([^|]+)/`doSomething \1`/6' sample.txt




$ ./456.sh
./456.sh: line 5: unexpected EOF while looking for matching `)'
./456.sh: line 6: syntax error: unexpected end of file


System: RHEL

ly5066113

回复 1# chendeshen


try:

1. awk -v n="3 6" 'BEGIN{FS=OFS="|";split(n,a," ")}{for(i in a)$a[i]=sprintf("%.15E",$a[i])}1' sample.txt

复制代码