我可以通过管道将 ispell 输出传送到数组吗？

Question

我需要以某种方式将 ispell -l 的输出放入一个数组中，以便我可以循环它们。

到目前为止，

cat $1 | ispell -l

我已经尝试将它们逐行读取到数组中，但这对我没有

任何建议？

Answer 1

它实际上比迄今为止提供的任何答案都要容易得多。您不需要调用任何外部二进制文件（例如 cat）或执行任何循环。

只需执行以下操作：

array=( $(ispell -l < $1) )

Answer 2

最近的 bash 附带了 mapfile 或 readarray：（

   readarray stuff < <(ispell -l < "$1")
   echo "number of lines: ${#stuff[@]}"

此示例有效返回 ispell -l <​​ "$1"|wc -l< /em>)

请注意错误，例如 ls | readarray，它不会工作，因为由于管道的原因，readarray 将位于子 shell 中。仅使用输入重定向。

---

   mapfile [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array]
   readarray [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array]
          Read lines from the standard input into the indexed array variable array, or from file descriptor fd if the -u option is supplied.  The vari‐
          able MAPFILE is the default array.  Options, if supplied, have the following meanings:
          -n     Copy at most count lines.  If count is 0, all lines are copied.
          -O     Begin assigning to array at index origin.  The default index is 0.
          -s     Discard the first count lines read.
          -t     Remove a trailing newline from each line read.
          -u     Read lines from file descriptor fd instead of the standard input.
          -C     Evaluate callback each time quantum lines are read.  The -c option specifies quantum.
          -c     Specify the number of lines read between each call to callback.

          If  -C  is specified without -c, the default quantum is 5000.  When callback is evaluated, it is supplied the index of the next array element
          to be assigned as an additional argument.  callback is evaluated after the line is read but before the array element is assigned.

          If not supplied with an explicit origin, mapfile will clear array before assigning to it.

          mapfile returns successfully unless an invalid option or option argument is supplied, array is invalid or unassignable, or if array is not an
          indexed array.

Answer 3

shell 中没有数组这样的东西。 （Bash 和 zsh 具有数组扩展；但是如果您发现自己认为 bash 或 zsh 扩展对脚本有帮助，那么正确的选择是用 perl 或 python 重写。/题外话）

您真正想要的是以下之一这些构造：

ispell -l < "$1" | while read line; do
    ... take action on "$line" ...
done

或者

for word in $(ispell -l < "$1"); do
    ... take action on "$word" ...
done

我需要更多地了解您想要做什么以及 ispell -l 的输出格式（我没有安装它，现在没有时间构建它）来告诉您以上哪一个是正确的选项。

Answer 4

#!/bin/bash

declare -a ARRAY_VAR=(`cat $1 | ispell -l`)

for var in ${ARRAY_VAR[@]}
do
    place your stuff to loop with ${VAR} here
done

Answer 5

您可以将 ispell 的结果通过管道传递给 awk

ispell -l $file | awk '
{
  print "Do something with $0"
  #Or put to awk array
  array[c++]=$0
}
END{
  print "processing the array here if you want"
  for(i=1;i<=c;i++){
     print i,array[i]
  }
}
'

awk 在迭代文件方面比 shell 具有更好的性能。