紅寶石多行正則表達式

Question

我有一個紅寶石多行字符串（稱爲efixes），看起來像：

ID STATE LABEL  INSTALL TIME  UPDATED BY ABSTRACT 
=== ===== ========== ================= ========== ====================================== 
1 S hayo32.02 xxxxxxx xxxxxxxx   xxxxxxxxxxxxxxx 
2 S 23434.23 xxxxxxx xxxxxxxx   xxxxxxxxxxxxxxx 

STATE codes: 
S = STABLE 
M = MOUNTED 
U = UNMOUNTED 
Q = REBOOT REQUIRED 
B = BROKEN 
I = INSTALLING 
R = REMOVING 
T = TESTED 
P = PATCHED 
N = NOT PATCHED 
SP = STABLE + PATCHED 
SN = STABLE + NOT PATCHED 
QP = BOOT IMAGE MODIFIED + PATCHED 
QN = BOOT IMAGE MODIFIED + NOT PATCHED 
RQ = REMOVING + REBOOT REQUIRED 

我只想顯示以數字開頭的行。我有麻煩，似乎沒有匹配。我在這裏找到了這個解決方案（我現在還沒有真正理解）：

efixes_array = efixes.split("\n").select{|x| /\A[0-9]/.match(x)} 
io.puts efixes_array.collect{|x| x.scan(/\A[0-9]/)}.flatten 

它只匹配數字。我想顯示整個行。最終的結果是，我想顯示「LABELS」欄下的內容。

Answer 1

這條線從您的示例代碼

efixes.split("\n").select{|x| /\A[0-9]/.match(x)}

返回與該以數字開頭的所有行的陣列。