替换 VIM 中从 = 到行尾的所有内容 [英] Substituting everything from = to end of the line in VIM

问题描述

假设我有几行:

$repeat_on =  $_REQUEST['repeat_on'];    
$opt_days = $_REQUEST['opt_day'];  
$opt_days = explode(",", $opt_days);

...等等.

假设我使用视觉模式选择所有行:如何替换从 = 到行尾的所有内容，使其看起来像:

Let's say I use visual mode to select all the lines: how can I replace everything from = to the end of the line so it looks like:

$repeat_on = NULL;    
$opt_days =  NULL;
$opt_days =  NULL;

推荐答案

选择块后，使用这个替代:

With the block selected, use this substitute:

s/=.*$/= NULL;

替换正则表达式通过将 = 和行尾之间的任何内容(包括 =)替换为 = NULL; 来更改每一行.

The substitution regex changes each line by replacing anything between = and the end of the line, including the =, with = NULL;.

命令的第一部分是与要替换的内容匹配的正则表达式:=.*$.

The first part of the command is the regex matching what is to be replaced: =.*$.

• = 是字面意思.
• 点. 表示任何字符.
• 所以 .* 表示:0 个或多个任意字符.
• 这由 $ 终止，用于 行尾，但这在这里实际上不是必需的:也可以在没有 $ 的情况下尝试.

• The = is taken literally.
• The dot . means any character.
• So .* means: 0 or more of any character.
• This is terminated by $ for end of line, but this actually isn't necessary here: try it also without the $.

所以正则表达式将匹配每一行中第一个=之后的区域，并将该区域替换为替换，即=NULL;.我们需要在替换中包含 = 以将其添加回来，因为它是要替换的匹配的一部分.

So the regex will match the region after the first = in each line, and replace that region with the replacement, which is = NULL;. We need to include the = in the replacement to add it back, since it's part of the match to be replaced.

当您选择了一个块，并点击 : 输入命令时，命令行将自动以视觉选择范围作为前缀，如下所示:

When you have a block selected, and you hit : to enter a command, the command line will be automatically prefixed with a range for the visual selection that looks like this:

:'<,'>

继续输入上面的命令，你的命令行将是:

Continue typing the command above, and your command-line will be:

:'<,'>s/=.*$/= NULL;

将替换应用到选定的视觉块.

Which will apply the replacement to the selected visual block.

如果您需要在一行中进行多个替换，则需要添加 g 标志:

If you'll need to have multiple replacements on a single line, you'll need to add the g flag:

:'<,'>s/=.*$/= NULL;/g

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