使用 Linux 刪除少於 4 個字符的單詞

Question

我已閱讀以下內容並嘗試根據我的需要重新設計命令邏輯。 但是，我只是沒能把它做好。

在bash中刪除長度小於2的單詞

試過： echo $example | sed -e 's/ [a-zA-Z0-9]\\{4\\} / /g' echo $example | sed -e 's/ [a-zA-Z0-9]\\{4\\} / /g'

使用 sed 刪除所有大於 6 個字符的單詞

試過： sed -e s'/[A-Za-z]\\{,4\\}//g'

---

請使用簡單的awk或sed命令幫助我執行以下操作：

Here is an example line of fantastic data

並得到：

Here example line fantastic data

Answer 1

$ echo Here is an example line of fantastic data | sed -E 's/\b\(\w\)\{,3\}\b\s*//g'
Here is an example line of fantastic data

Answer 2

如果將句子存儲在變量中，則可以在 for 循環中遍歷它。 然后您可以評估每個單詞是否大於 2 個字符。

sentence="Here is an example line of fantastic data";
for word in $sentence; do
    if [ ${#word} -gt 2]; then
        echo -n $word;
        echo -n " ";
    fi
done

Answer 3

這是一個 BASH 示例，說明如果文件中有很多句子，這是最常見的情況，該怎么做？

SCRIPT（刪除兩個字母或更短的單詞）

#!/bin/bash

while read line
do

    echo "$line" | sed -E 's/\b\w{1,2}\b//g' 

done < <( cat sentences.txt )

輸入

$  cat sentences.txt
Edgar Allan Poe (January 19, 1809 to October 7, 1849) was an
American writer, poet, critic and editor best known for evocative
short stories and poems that captured the imagination and interest
of readers around the world. His imaginative storytelling and tales
of mystery and horror gave birth to the modern detective story.

Many of Poe’s works, including “The Tell-Tale Heart” and
“The Fall of the House of Usher,” became literary classics. Some
aspects of Poe’s life, like his literature, is shrouded in mystery,
and the lines between fact and fiction have been blurred substantially
since his death.

輸出

$ ./grep_tests.sh
Edgar Allan Poe (January , 1809  October , 1849) was
American writer, poet, critic and editor best known for evocative
short stories and poems that captured the imagination and interest
 readers around the world. His imaginative storytelling and tales
 mystery and horror gave birth  the modern detective story.

Many  Poe’ works, including “The Tell-Tale Heart” and
“The Fall  the House  Usher,” became literary classics. Some
aspects  Poe’ life, like his literature,  shrouded  mystery,
and the lines between fact and fiction have been blurred substantially
since his death.