1
我正試圖在只有一個(+)開頭的文本文件中找到一些行。Bash腳本:如何查找以一個字符開頭的行?
我的文件:
--- step31.php 2017-03-10 18:34:59.430949110 +0330
+++ step32.php 2017-03-10 18:34:59.430949110 +0330
@@ -1,6 +1,6 @@
<?php
defined('_JEXEC') or die;
-JLoader::register('BannersHelper', JPATH_COMPONENT . '/helpers/banners.php');
+JLoader::register('BannersHelper', JPATH_ADMINISTRATOR . '/components/com_banners/helpers/banners.php');
class BannersViewBanner extends JViewLegacy{
protected $form;
protected $item;
@@ -32,7 +32,7 @@
JToolbarHelper::save2copy('banner.save2copy');}
if (empty($this->item->id)) {
JToolbarHelper::cancel('banner.cancel');} else {
- if ($this->state->params->get('save_history', 0) && $user->authorise('core.edit')) {
+ if ($this->state->params->get('save_history', 0) && $canDo->get('core.edit')) {
JToolbarHelper::versions('com_banners.banner', $this->item->id);}
所需的輸出:
+JLoader::register('BannersHelper', JPATH_ADMINISTRATOR . '/components/com_banners/helpers/banners.php');
+ if ($this->state->params->get('save_history', 0) && $canDo->get('core.edit')) {
我用grep '^+'
但輸出是:
+++ step32.php 2017-03-10 18:34:59.430949110 +0330
+JLoader::register('BannersHelper', JPATH_ADMINISTRATOR . '/components/com_banners/helpers/banners.php');
+ if ($this->state->params->get('save_history', 0) && $canDo->get('core.edit')) {
假設你想選擇以單加(不是兩個或更多的加號)開始的行,那麼'grep'^ + [^ +]'...'?除非你想要只包含一個加號的行:'grep -E'^ +([^ +] | $)'...' –