Execute command when matches a pattern in vim

There are some situations while working in vim to add/delete/replace some keywords/lines based on matched pattern. Like remove ^M from a file and we explained various methods to do so.
User may face few other situations where they can use vim commands like %s or :g efficiently.

  1. Find a pattern globally and delete the matched lines
    Ex: Delete all lines which matches “No match” in a file

[vim]:g/No match/d

  1. Delete all blank lines from a file


  1. Delete lines which have one or more spaces only

[vim]:g /^\s*$/d
[vim]:g!/\S/d or v/\S/d

  1. Delete all lines which doesn’t match the pattern
    Delete all lines except lines which have the ‘2013-10-29’ date format in the line

[/vim] or

  1. Copy all lines matching a pattern to end of file.


  1. Move all lines matching a pattern to end/top of file.

[/vim] or
Source:  http://vim.wikia.com/wiki/Power_of_g
I hope it will solve another vim users problem in their day-to-day activities.

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