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多行字符串的长度

tag-icon • tag-icon bash shell-script text-processing
多行字符串的长度

我有一个多行字符串，如下所示

"this is a sample
this is a second sample
same length the 1 above
this is a third sample"

有什么方法可以找到哪些行具有最大长度（以字符数计）以及长度是多少。在上面的示例中，这将是第二行和第三行。

答案1

string="this is a sample
this is a second sample
same length the 1 above
this is a third sample"

printf '%s\n' "$string" | awk -v max=-1 '
  {l = length}
  l > max {max = l; output = "Max length: " max RS}
  l == max {output = output NR ": " $0 RS}
  END {if (max >= 0) printf "%s", output}'

输出：

Max length: 23
2: this is a second sample
3: same length the 1 above

答案2

echo "this is a sample
this is a second sample
this is a third sample" | \
while read line; do 
  echo ${#line} $line
done | sort -n

为您提供具有长度的行列表，按长度排序

答案3

总统计数据顶部使用 GNU 的最长行awk解决方案：

awk 'BEGIN{ PROCINFO["sorted_in"]="@ind_num_desc" }
     { len=length; a[len]=(a[len])? a[len]", "NR:NR }
     END{ for(i in a) printf "Length: %s, row number(s): %s\n",i,a[i] }' file

输出：

Length: 23, row number(s): 2, 3
Length: 22, row number(s): 4
Length: 16, row number(s): 1

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