Explanation: for each line I append to value under key shown in 1st filed ($1) space and 2nd field ($2), if it was not yet present, space followed by content of 2nd field is place. After all lines are processed for each key in array I printf that key and value under that key, note that space is not required in 1st argument as it is already 1st character of each value.
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我将使用gnu
awk进行此任务以下方式，让input1.txtcontent beand
input2.txt2.txtbe be提供
输出
说明：我将每行我附加到第1个提交中显示的密钥（
$ 1）和第二个字段（$ 2），如果尚不存在第二场是地方。在对数组中的每个键处理所有键iprintf该键下的所有键后，请注意第一个参数中不需要空格，因为它已经是每个值的第一个字符。（在GAWK 4.2.1中测试）
I would use GNU
AWKfor this task following way, letinput1.txtcontent beand
input2.txtcontent bethen
gives output
Explanation: for each line I append to value under key shown in 1st filed (
$1) space and 2nd field ($2), if it was not yet present, space followed by content of 2nd field is place. After all lines are processed for each key in array Iprintfthat key and value under that key, note that space is not required in 1st argument as it is already 1st character of each value.(tested in gawk 4.2.1)