The Global Command

Both Ex commands and command-line commands are the same. They are the commands that start with a colon (:).

:g/pattern/command

The global command works by executing command against each line that matches the pattern

:g/console/d
remove all lines containing "console"
在运行g命令时，Vim对文件进行两次扫描。在第一次运行时，它扫描每一行并标记与/console/模式匹配的行。一旦标记了所有匹配的行，它将第二次执行，并在标记的行上执行d命令。

run the global command on non-matching lines:
:g!/pattern/command
or
:v/pattern/command

:g/one|two/d
delete the lines containing either "one" or "two

:g/[0-9]/d
or
:g/\d/d
delete the lines containing any single digits

:g/0{3,6}/d
match the lines containing between three to six zeroes

.,3
between the current line and line 3

3,$
between line 3 and the last line

+n
n lines after the current line.

:g/./normal A;
add a ";" to the end of each line
/./ 是 “非空行”的模式。它匹配至少有一个字符的行，所以它匹配带有"const"和"console"的行，而不匹配空行。

• 宏
  qa0A;<Esc>q
  在寄存器a中创建一个宏，这些行末尾添加一个逗号
  :g/const/normal @a
  使用

• Recursive Global Command
  :g/console/g/two/d
  delete the second console.log
  首先，g将查找包含模式“console”的行，并将找到3个匹配项。然后第二个g将从这三个匹配中寻找包含模式“2”的行。最后，它将删除该匹配。

• 改变分隔符

:g@console@d
delete the lines containing "console"

g@one@s+const+let+g
using the substitute command with the global command, you can have two different delimiters

• 默认的命令
  如果未指定命令，会执行输出命令
  :g/console
  print at the bottom of the screen all the lines containing "console".

• Reversing The Entire Buffer
  :g/^/m 0
  reverse the entire file

• Aggregating All TODOs

编写代码时，有时我会在正在编辑的文件中编写TODOs
const one = 1;
console.log("one: ", one);
// TODO: feed the puppy

const two = 2;
// TODO: feed the puppy automatically
console.log("two: ", two);

const three = 3;
console.log("three: ", three);
// TODO: create a startup selling an automatic puppy feeder
跟踪所有创建的todo可能很难。
要将所有TODOs复制到文件末尾，以便更容易地进行内省，运行:
:g/TODO/t $

结果：
const one = 1;
console.log("one: ", one);

const two = 2;
console.log("two: ", two);

const three = 3;
console.log("three: ", three);

// TODO: feed the puppy
// TODO: feed the puppy automatically
// TODO: create a startup selling an automatic puppy feeder

:g/console/d _
删除并不存储到寄存器中

减少多个空行为一个空行

:g/^$/,/./-1j

通常，全局命令接受以下格式：：g / pattern / command。 但是，您也可以使用以下格式运行全局命令：：g / pattern1 /，/ pattern2 / command。 这样，Vim将在pattern1和pattern2中应用命令：
/pattern1/是/^$/
它表示空行(带有零字符的行)。
/pattern2/ is /./ with -1 line modifier
表示非空行(至少有一个字符的行)。-1表示上面的一行。
command is j, the join command (:j).
在这个上下文中，这个全局命令连接所有给定的行。

:g/^$/,/./j
将多个空行减少为无行

• Advanced Sort
  const arrayB = [
  "i",
  "g",
  "h",
  "b",
  "f",
  "d",
  "e",
  "c",
  "a",
  ]

const arrayA = [
"h",
"b",
"f",
"d",
"e",
"a",
"c",
]
you need to sort the elements inside the arrays, but not the arrays themselves

:g/[/+1,/]/-1sort

结果：
const arrayB = [
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
]

const arrayA = [
"a"
"b",
"c",
"d",
"e",
"f",
"h",
]

• :g/[/
  is the global command pattern.
• /[/+1
  第一个模式。它匹配左方括号“[”。+1指的是它下面的一行 。
• /]/-1
  第二种模式。它匹配右方括号“]”。-1指的是它上面的一行。
• /[/+1,/]/-1
  then refers to any lines between "[" and "]".
• sort
  is a command-line command to sort.