Question

我有下一个文件myfile.txt

window.ShowDialog()

我想在普通视图中执行此文件：

"field1","val1","val2","val3"
"field2","val1","val2","val3"
"field3","val1","va
  l2","va
  l3"
"field4","val1","val2","val3"

所以，我试图用下一个命令来做到这一点：

"field1","val1","val2","val3"
"field2","val1","val2","val3"
"field3","val1","val2","val3"
"field4","val1","val2","val3"

但有些不对劲。请帮助我，我不是unix命令的大师

Answer 1

试试这个：

filename=$1

while read -r line
do
   found=$found$(echo $line | grep '[^"]')
   if [[ -n $found && $found == *\" ]]; then
       echo $found;
       found=''
   fi
done < "$filename"

变量$found总是以这种方式附加到自身，您将加入“断行”。
然后检查$found是否为空（-n是否为空），然后检查$found是否以@Barmar建议的报价结尾

如果它以一个结尾的引号结束，那么你echo $found将变量设置为空

Answer 2

sed 解决方案：

sed -Ez 's/[[:space:]]+//g; s/""/","/g; s/(([^,]+,){3})([^,]+),/\1\3\n/g; $a\\' myfile.txt

-z - 将输入视为由空（零）字符而不是换行符分隔的行
s/[[:space:]]+//g - 删除行之间/行内的空格
s/""/","/g - 分隔包裹/破坏的相邻字段
s/(([^,]+,){3})([^,]+),/\1\3\n/g - 在每个第4个字段设置换行符（记录分隔符）
$a\\ - 在内容的末尾附加最后一个换行符

输出：

"field1","val1","val2","val3"
"field2","val1","val2","val3"
"field3","val1","val2","val3"
"field4","val1","val2","val3"

Answer 3

在不知道输入数量的字段的情况下，您可以使用FPAT和gensub来使用此gnu-awk解决方案：

awk -v RS= -v FPAT='("[^"]*"|[^,"]+),?' -v OFS= '{
      for (h=1; h<=NF; h++) $h = gensub(/([^"])\n[[:blank:]]*/, "\\1", "g", $h); } 1' file

"field1","val1","val2","val3"
"field2","val1","val2","val3"
"field3","val1","val2","val3"
"field4","val1","val2","val3"

要将更改保存回文件使用：

awk -i inplace -v RS= -v FPAT='("[^"]*"|[^,"]+),?' -v OFS= '{
       for (h=1; h<=NF; h++) $h = gensub(/([^"])\n[[:blank:]]*/, "\\1", "g", $h); } 1' file

如何通过unix命令连接行

3 个答案: